#
aa1cfba7 |
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20-Oct-2023 |
Thomas Perrot <thomas.perrot@bootlin.com> |
ARM: at91: pm: set soc_pm.data.mode in at91_pm_secure_init() In non secure mode, soc_pm.data.mode is set when entering pm in at91_pm_begin(). This value is used (not only) to determine if the system is going into slow clock mode (at91_suspend_entering_slow_clock()). This function is called from various drivers to check this and act accordingly. If not set, the driver might enter an incorrect suspend mode. When using secure suspend mode, at91_pm_begin() is not called and thus soc_pm.data.mode is not set. Since when using secure suspend, only one suspend mode is supported, set this value directly in at91_pm_secure_init(). Signed-off-by: Clément Léger <clement.leger@bootlin.com> Signed-off-by: Thomas Perrot <thomas.perrot@bootlin.com> Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com> Link: https://lore.kernel.org/r/20231020130219.1255937-1-thomas.perrot@bootlin.com Signed-off-by: Claudiu Beznea <claudiu.beznea@tuxon.dev>
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#
d4b564a5 |
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17-Jul-2023 |
Rob Herring <robh@kernel.org> |
ARM: at91: Explicitly include correct DT includes The DT of_device.h and of_platform.h date back to the separate of_platform_bus_type before it was merged into the regular platform bus. As part of that merge prepping Arm DT support 13 years ago, they "temporarily" include each other. They also include platform_device.h and of.h. As a result, there's a pretty much random mix of those include files used throughout the tree. In order to detangle these headers and replace the implicit includes with struct declarations, users need to explicitly include the correct includes. A couple of other includes are unused and can be dropped too. Signed-off-by: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20230717225429.3211307-1-robh@kernel.org Signed-off-by: Claudiu Beznea <claudiu.beznea@tuxon.dev>
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#
ccd4923d |
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18-May-2023 |
Claudiu Beznea <claudiu.beznea@microchip.com> |
ARM: at91: pm: fix imbalanced reference counter for ethernet devices The of_find_device_by_node() function is returning a struct platform_device object with the embedded struct device member's reference counter incremented. This needs to be dropped when done with the platform device returned by of_find_device_by_node(). at91_pm_eth_quirk_is_valid() calls of_find_device_by_node() on suspend and resume path. On suspend it calls of_find_device_by_node() and on resume and failure paths it drops the counter of struct platform_device::dev. In case ethernet device may not wakeup there is a put_device() on at91_pm_eth_quirk_is_valid() which is wrong as it colides with put_device() on resume path leading to the reference counter of struct device embedded in struct platform_device to be messed, stack trace to be displayed (after 5 consecutive suspend/resume cycles) and execution to hang. Along with this the error path of at91_pm_config_quirks() had been also adapted to decrement propertly the reference counter of struct device embedded in struct platform_device. Fixes: b7fc72c63399 ("ARM: at91: pm: add quirks for pm") Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com> Link: https://lore.kernel.org/r/20230518062511.2988500-1-claudiu.beznea@microchip.com
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#
a5752075 |
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31-Aug-2022 |
Claudiu Beznea <claudiu.beznea@microchip.com> |
pinctrl: at91: move gpio suspend/resume calls to driver's context Move gpio suspend/resume execution local to driver and let it execute as close as possible to the moment the machine specific PM code is executed (by setting it to .noirq member of dev_pm_ops). With this the at91_pinctrl_gpio_suspend()/at91_pinctrl_gpio_resume() calls were removed from arch/arm/mach-at91/pm.c and also a header has been removed. The patch has been checked on sama5d3_xplained, sam9x60ek, sama5d2_xplained, sama7g5ek boards. Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Link: https://lore.kernel.org/r/20220831135636.3176406-3-claudiu.beznea@microchip.com Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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#
7a94b83a |
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26-Aug-2022 |
Claudiu Beznea <claudiu.beznea@microchip.com> |
ARM: at91: pm: fix DDR recalibration when resuming from backup and self-refresh On SAMA7G5, when resuming from backup and self-refresh, the bootloader performs DDR PHY recalibration by restoring the value of ZQ0SR0 (stored in RAM by Linux before going to backup and self-refresh). It has been discovered that the current procedure doesn't work for all possible values that might go to ZQ0SR0 due to hardware bug. The workaround to this is to avoid storing some values in ZQ0SR0. Thus Linux will read the ZQ0SR0 register and cache its value in RAM after processing it (using modified_gray_code array). The bootloader will restore the processed value. Fixes: d2d4716d8384 ("ARM: at91: pm: save ddr phy calibration data to securam") Suggested-by: Frederic Schumacher <frederic.schumacher@microchip.com> Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Link: https://lore.kernel.org/r/20220826083927.3107272-4-claudiu.beznea@microchip.com
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#
91d60e25 |
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22-Jun-2022 |
Fabio Estevam <festevam@denx.de> |
ARM: at91: pm: Mark at91_pm_secure_init as __init at91_pm_secure_init() is used inside sama5d2_pm_init(), which has the __init notation. Pass the __init notation to at91_pm_secure_init() as well to fix the following section mismatch warning: WARNING: modpost: vmlinux.o(.text.unlikely+0x2138): Section mismatch in reference from the function at91_pm_secure_init() to the (unknown reference) .init.rodata:(unknown) Fixes: f2f5cf78a333 ("ARM: at91: pm: add support for sama5d2 secure suspend") Signed-off-by: Fabio Estevam <festevam@denx.de> Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Link: https://lore.kernel.org/r/20220622114810.1186330-1-festevam@gmail.com
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1c40169b |
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22-May-2022 |
Claudiu Beznea <claudiu.beznea@microchip.com> |
ARM: at91: pm: use proper compatibles for sama7g5's rtc and rtt Use proper compatible strings for SAMA7G5's RTC and RTT IPs. These are necessary for configuring wakeup sources for ULP1 PM mode. Fixes: 6501330f9f5e ("ARM: at91: pm: add pm support for SAMA7G5") Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Link: https://lore.kernel.org/r/20220523092421.317345-4-claudiu.beznea@microchip.com
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#
64152266 |
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22-May-2022 |
Claudiu Beznea <claudiu.beznea@microchip.com> |
ARM: at91: pm: use proper compatibles for sam9x60's rtc and rtt Use proper compatible strings for SAM9X60's RTC and RTT IPs. These are necessary for configuring wakeup sources for ULP1 PM mode. Fixes: eaedc0d379da ("ARM: at91: pm: add ULP1 support for SAM9X60") Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Link: https://lore.kernel.org/r/20220523092421.317345-3-claudiu.beznea@microchip.com
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#
ddc980da |
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22-May-2022 |
Claudiu Beznea <claudiu.beznea@microchip.com> |
ARM: at91: pm: use proper compatible for sama5d2's rtc Use proper compatible strings for SAMA5D2's RTC IPs. This is necessary for configuring wakeup sources for ULP1 PM mode. Fixes: d7484f5c6b3b ("ARM: at91: pm: configure wakeup sources for ULP1 mode") Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Link: https://lore.kernel.org/r/20220523092421.317345-2-claudiu.beznea@microchip.com
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#
f2f5cf78 |
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02-May-2022 |
Clément Léger <clement.leger@bootlin.com> |
ARM: at91: pm: add support for sama5d2 secure suspend When running with OP-TEE, the suspend control is handled securely. Suspend can be entered using PSCI support. Since the sama5d2 supports multiple suspend modes, add a new CONFIG_ATMEL_SECURE_PM which will send a SMC call to select the suspend mode at init time. "atmel.pm_modes" boot argument is still supported for compatibility purposes but the standby value is actually ignored since PSCI suspend is used and it only support one mode (suspend). Signed-off-by: Clément Léger <clement.leger@bootlin.com> Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
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#
b7fc72c6 |
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06-May-2022 |
Claudiu Beznea <claudiu.beznea@microchip.com> |
ARM: at91: pm: add quirks for pm SoCs supporting ULP0 or ULP1 modes and variants of Cadence Ethernet IP (controlled by macb driver) may behave buggy when Wake-on-Lan (WoL) is configured and WoL packet is received while in ULP0/ULP1. On some SoCs Ethernet interface is not working after resume. On other SoCs the CPU goes to abort on resume path when switching execution from internal SRAM to DRAM. For ULP1 + WoL the issue is related a particular restart sequence of the internal clocks when resuming. These clocks are automatically managed by PMC and may happen that GMAC peripheral clock is restarted few clock cycles before internal clocks causing blocking of Ethernet's DMA. As a consequence Ethernet TX transactions are stopped and RX transactions are partially stopped (packets are received by MAC, RX counters incremented but the data is not transferred to DRAM). The workaround for this is to disable Ethernet's peripheral clock when going to ULP1. Same behavior has been reproduced on ULP0 for some platforms (SAMA5D2, SAMA5D3) and the same workaround solves the issue. The problem has been solved on pm.c as quirk to avoid polluting the MACB driver with AT91 specific issues as this driver is generic to multiple vendors. At probe pointers to struct device_node are retrieved and on the at91_pm_enter() the quirk specifics are applied: for all Ethernet interfaces that were parsed the peripheral clocks are disabled. A special handling is done for modes in dns_modes mask as these are considered modes that blocks the system if WoL packet are received but for which applying quirk will lead to not waking up on WoL packets: in situation where Ethernet interface(s) has suspend mode in dns_modes mask and Ethernet interface(s) is the only available wakeup source the suspend is canceled. Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
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#
9750d3b4 |
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06-May-2022 |
Claudiu Beznea <claudiu.beznea@microchip.com> |
ARM: at91: pm: use kernel documentation style Use kernel documentation style. Along with it fix the naming of struct at91_pm_sfrbu_regs in documentation. Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
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#
b568c71d |
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06-May-2022 |
Claudiu Beznea <claudiu.beznea@microchip.com> |
ARM: at91: pm: introduce macros for pm mode replacement Introduce macros to replace standby/suspend mode if they depends on controllers that failed to map (or other errors). Macros keep track of the complementary mode to avoid having set the same AT91 PM mode for both suspend and standby. Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
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#
22cbf077 |
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06-May-2022 |
Claudiu Beznea <claudiu.beznea@microchip.com> |
ARM: at91: pm: keep documentation inline with structure members Move documentation of bu to keep the same order as in the structure itself. Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
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#
9584e726 |
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13-Jan-2022 |
Claudiu Beznea <claudiu.beznea@microchip.com> |
ARM: at91: PM: add cpu idle support for sama7g5 Add CPU idle support for SAMA7G5. Support will make use of PMC_CPU_RATIO register to divide the CPU clock by 16 before switching it to idle and use automatic self-refresh option of DDR controller. Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Acked-by: Stephen Boyd <sboyd@kernel.org> Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com> Link: https://lore.kernel.org/r/20220113144900.906370-5-claudiu.beznea@microchip.com
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#
bb29e409 |
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14-Oct-2021 |
Wan Jiabing <wanjiabing@vivo.com> |
ARM: at91: pm: Add of_node_put() before goto Fix following coccicheck warning: ./arch/arm/mach-at91/pm.c:643:1-33: WARNING: Function for_each_matching_node_and_match should have of_node_put() before goto Early exits from for_each_matching_node_and_match should decrement the node reference counter. Signed-off-by: Wan Jiabing <wanjiabing@vivo.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com> Link: https://lore.kernel.org/r/20211014084555.21422-1-wanjiabing@vivo.com
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#
ac809e78 |
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30-Aug-2021 |
Claudiu Beznea <claudiu.beznea@microchip.com> |
ARM: at91: pm: switch backup area to vbat in backup mode Backup area is now switched to VDDIN33 at boot (with the help of bootloader). When switching to backup mode we need to switch backup area to VBAT as all the other power sources are cut off. The resuming from backup mode is done with the help of bootloader, so there is no need to do something particular in Linux to restore backup area power source. Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com> Link: https://lore.kernel.org/r/20210830100927.22711-1-claudiu.beznea@microchip.com
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#
1605de1b |
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23-Aug-2021 |
Claudiu Beznea <claudiu.beznea@microchip.com> |
ARM: at91: pm: do not panic if ram controllers are not enabled In case PM is enabled but there is no RAM controller information in DT the code will panic. Avoid such scenarios by not initializing platform specific PM code in case RAM controller is not provided via DT. Reported-by: Eugen Hristev <eugen.hristev@microchip.com> Fixes: 827de1f123ba0 ("ARM: at91: remove at91_dt_initialize and machine init_early()") Fixes: 892e1f4a3ae58 ("ARM: at91: pm: add sama7g5 ddr phy controller") Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com> Link: https://lore.kernel.org/r/20210823131915.23857-2-claudiu.beznea@microchip.com
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#
ad9bc2e3 |
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15-Apr-2021 |
Claudiu Beznea <claudiu.beznea@microchip.com> |
ARM: at91: pm: add sama7g5 shdwc Add SAMA7G5 SHDWC. Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com> Link: https://lore.kernel.org/r/20210415105010.569620-25-claudiu.beznea@microchip.com
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#
6501330f |
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15-Apr-2021 |
Claudiu Beznea <claudiu.beznea@microchip.com> |
ARM: at91: pm: add pm support for SAMA7G5 Add support for SAMA7G5 power management modes: standby, ulp0, ulp1, backup. Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com> Link: https://lore.kernel.org/r/20210415105010.569620-24-claudiu.beznea@microchip.com
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#
ccdbdf33 |
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15-Apr-2021 |
Claudiu Beznea <claudiu.beznea@microchip.com> |
ARM: at91: pm: add sama7g5's pmc Add SAMA7G5's PMC to compatible list. Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com> Link: https://lore.kernel.org/r/20210415105010.569620-22-claudiu.beznea@microchip.com
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#
f205adb6 |
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15-Apr-2021 |
Claudiu Beznea <claudiu.beznea@microchip.com> |
ARM: at91: pm: add backup mode support for SAMA7G5 Adapt at91_pm_backup_init() to work for SAMA7G5. Also, set the LPM pin to shutdown controller. This will signal to PMIC that it needs to switch to the state corresponding to backup mode. Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com> Link: https://lore.kernel.org/r/20210415105010.569620-21-claudiu.beznea@microchip.com
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#
d2d4716d |
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15-Apr-2021 |
Claudiu Beznea <claudiu.beznea@microchip.com> |
ARM: at91: pm: save ddr phy calibration data to securam The resuming from backup mode is done with the help of bootloader. The bootloader reconfigure the DDR controller and DDR PHY controller. To speed-up the resuming process save the PHY calibration data into SECURAM before suspending (securam is powered on backup mode). This data will be later used by bootloader in DDR PHY reconfiguration process. Also, in the process or recalibration the first 8 words of the memory may get corrupted. To solve this, these 8 words are saved in the securam and restored by bootloader in the process of PHY configuration. Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com> Link: https://lore.kernel.org/r/20210415105010.569620-20-claudiu.beznea@microchip.com
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#
892e1f4a |
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15-Apr-2021 |
Claudiu Beznea <claudiu.beznea@microchip.com> |
ARM: at91: pm: add sama7g5 ddr phy controller SAMA7G5 self-refresh procedure accesses also the DDR PHY registers. Adapt the code so that the at91_dt_ramc() to look also for DDR PHYs, in case it is mandatory. Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com> Link: https://lore.kernel.org/r/20210415105010.569620-19-claudiu.beznea@microchip.com
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#
2c26cb4d |
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15-Apr-2021 |
Claudiu Beznea <claudiu.beznea@microchip.com> |
ARM: at91: pm: add sama7g5 ddr controller Add SAMA7G5 DDR controller to the list of DDR controller compatibles. At the moment there is no standby support. Adapt the code for this. Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com> Link: https://lore.kernel.org/r/20210415105010.569620-18-claudiu.beznea@microchip.com
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629ba8ee |
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15-Apr-2021 |
Claudiu Beznea <claudiu.beznea@microchip.com> |
ARM: at91: pm: do not initialize pdev There is no need to initialize pdev. Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com> Link: https://lore.kernel.org/r/20210415105010.569620-6-claudiu.beznea@microchip.com
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#
404956f4 |
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15-Apr-2021 |
Claudiu Beznea <claudiu.beznea@microchip.com> |
ARM: at91: pm: check for different controllers in at91_pm_modes_init() at91_pm_modes_init() checks for proper nodes in device tree and maps them accordingly. Up to SAMA7G5 all AT91 SoCs had the same mapping b/w power saving modes and different controllers needed in the final/first steps of suspend/resume. SAMA7G5 is not aligned with the old SoCs thus the code is adapted for this. This patch prepares the field for next commits. Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com> Link: https://lore.kernel.org/r/20210415105010.569620-5-claudiu.beznea@microchip.com
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#
0a7a2443 |
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15-Apr-2021 |
Claudiu Beznea <claudiu.beznea@microchip.com> |
ARM: at91: pm: document at91_soc_pm structure Document at91_soc_pm structure. Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com> Link: https://lore.kernel.org/r/20210415105010.569620-4-claudiu.beznea@microchip.com
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#
fe4c09e5 |
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15-Apr-2021 |
Claudiu Beznea <claudiu.beznea@microchip.com> |
ARM: at91: pm: move the setup of soc_pm.bu->suspended Move the setup of soc_pm.bu->suspended in platform_suspend::begin function so that the PMC code in charge with clocks suspend/resume to differentiate b/w standard PM mode and backup mode. Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Reviewed-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com> Link: https://lore.kernel.org/r/20210415105010.569620-3-claudiu.beznea@microchip.com
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#
f19dd1df |
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15-Apr-2021 |
Claudiu Beznea <claudiu.beznea@microchip.com> |
ARM: at91: pm: move pm_bu to soc_pm data structure Move pm_bu to soc_pm data structure. Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com> Link: https://lore.kernel.org/r/20210415105010.569620-2-claudiu.beznea@microchip.com
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#
41dbf4a1 |
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02-Mar-2021 |
Lee Jones <lee.jones@linaro.org> |
ARM: at91: pm: Move prototypes to mutually included header Both the caller and the supplier's source file should have access to the include file containing the prototypes. Fixes the following W=1 kernel build warning(s): drivers/pinctrl/pinctrl-at91.c:1637:6: warning: no previous prototype for ‘at91_pinctrl_gpio_suspend’ [-Wmissing-prototypes] 1637 | void at91_pinctrl_gpio_suspend(void) | ^~~~~~~~~~~~~~~~~~~~~~~~~ drivers/pinctrl/pinctrl-at91.c:1661:6: warning: no previous prototype for ‘at91_pinctrl_gpio_resume’ [-Wmissing-prototypes] 1661 | void at91_pinctrl_gpio_resume(void) | ^~~~~~~~~~~~~~~~~~~~~~~~ Cc: Russell King <linux@armlinux.org.uk> Cc: Nicolas Ferre <nicolas.ferre@microchip.com> Cc: Alexandre Belloni <alexandre.belloni@bootlin.com> Cc: Ludovic Desroches <ludovic.desroches@microchip.com> Signed-off-by: Lee Jones <lee.jones@linaro.org> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20210303124149.3149511-1-lee.jones@linaro.org
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#
faf6dc64 |
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04-Aug-2020 |
Alexandre Belloni <alexandre.belloni@bootlin.com> |
ARM: at91: pm: remove unnecessary at91sam9x60_idle cpu_do_idle() is already the default action for arm_pm_idle, there is no need to open code it. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com> Link: https://lore.kernel.org/r/20200804115622.63232-1-alexandre.belloni@bootlin.com
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#
e222f943 |
|
05-Aug-2020 |
Claudiu Beznea <claudiu.beznea@microchip.com> |
ARM: at91: pm: of_node_put() after its usage Put node after it has been used. Fixes: 13f16017d3e3f ("ARM: at91: pm: Tie the USB clock mask to the pmc") Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/1596616610-15460-4-git-send-email-claudiu.beznea@microchip.com
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#
39add360 |
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05-Aug-2020 |
Claudiu Beznea <claudiu.beznea@microchip.com> |
ARM: at91: pm: add per soc validation of pm modes Not all SoCs supports all the PM mode. User may end up settings, e.g. backup mode, on a non SAMA5D2 device, but the mode to not be valid. If backup mode is used on a devices not supporting it there will be no way of resuming other than rebooting. Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/1596616610-15460-3-git-send-email-claudiu.beznea@microchip.com
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#
e70bfc2f |
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05-Aug-2020 |
Claudiu Beznea <claudiu.beznea@microchip.com> |
ARM: at91: pm: add support for ULP0 fast wakeup ULP0 fast improves suspend/resume time with few milliseconds the drawback being the power consumption. The mean values measured for suspend/resume time are as follows (measured on SAMA5D2 Xplained board), ULP0 compared with fast ULP0: - ulp0 fast: suspend time: 169 ms, resume time: 216 ms - ulp0 : suspend time: 197 ms, resume time: 258 ms Current consumption while suspended (measured on SAMA5D2 Xplained board): - ulp0 fast: 730uA - ulp0 : 270uA Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/1596616610-15460-2-git-send-email-claudiu.beznea@microchip.com
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#
f87a4f02 |
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04-Jun-2020 |
yu kuai <yukuai3@huawei.com> |
ARM: at91: pm: add missing put_device() call in at91_pm_sram_init() if of_find_device_by_node() succeed, at91_pm_sram_init() doesn't have a corresponding put_device(). Thus add a jump target to fix the exception handling for this function implementation. Fixes: d2e467905596 ("ARM: at91: pm: use the mmio-sram pool to access SRAM") Signed-off-by: yu kuai <yukuai3@huawei.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20200604123301.3905837-1-yukuai3@huawei.com
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#
0be298a9 |
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20-Jan-2020 |
Claudiu Beznea <claudiu.beznea@microchip.com> |
ARM: at91: pm: add pmc_version member to at91_pm_data This will be used to differentiate b/w different PLLs settings to be applied in the final/first steps of the suspend/resume process by doing PLL specific configurations. Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Acked-by: Stephen Boyd <sboyd@kernel.org> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/1579522208-19523-5-git-send-email-claudiu.beznea@microchip.com
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6ec1587b |
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20-Jan-2020 |
Claudiu Beznea <claudiu.beznea@microchip.com> |
ARM: at91: pm: use proper master clock register offset SAM9X60's PMC has different master clock register offset than the other SoCs' PMC. Due to this, specify master clock register offset based on PMC compatible and pass it to pm_suspend.S since it is also needed in there. When PM part for SAM9X60 was published the SAM9X60's PMC (commit f6deae46039c ("clk: at91: add sam9x60 pmc driver")) wasn't integrated. Fixes: 01c7031cfa73 ("ARM: at91: pm: initial PM support for SAM9X60") Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/1579522208-19523-2-git-send-email-claudiu.beznea@microchip.com
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ec6e618c |
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11-Dec-2019 |
Claudiu Beznea <claudiu.beznea@microchip.com> |
ARM: at91: pm: use of_device_id array to find the proper shdwc node Use of_device_id array to find the proper shdwc compatibile node. SAM9X60's shdwc changes were not integrated when commit eaedc0d379da ("ARM: at91: pm: add ULP1 support for SAM9X60") was integrated. Fixes: eaedc0d379da ("ARM: at91: pm: add ULP1 support for SAM9X60") Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Link: https://lore.kernel.org/r/1576062248-18514-3-git-send-email-claudiu.beznea@microchip.com Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
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6b9dfd98 |
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11-Dec-2019 |
Claudiu Beznea <claudiu.beznea@microchip.com> |
ARM: at91: pm: use SAM9X60 PMC's compatible SAM9X60 PMC's has a different PMC. It was not integrated at the moment commit 01c7031cfa73 ("ARM: at91: pm: initial PM support for SAM9X60") was published. Fixes: 01c7031cfa73 ("ARM: at91: pm: initial PM support for SAM9X60") Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Link: https://lore.kernel.org/r/1576062248-18514-2-git-send-email-claudiu.beznea@microchip.com Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
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#
eb0df9b7 |
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29-Nov-2019 |
Claudiu Beznea <claudiu.beznea@microchip.com> |
ARM: at91: pm: move SAM9X60's PM under its own SoC config flag Move SAM9X60's PM part under SoC config flag. This allows the building of SAM9X60 platform withouth depending on CONFIG_SOC_AT91SAM9 flag, allowing us to select only necessary config flags for SAM9X60. Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Link: https://lore.kernel.org/r/1575035505-6310-4-git-send-email-claudiu.beznea@microchip.com Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
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95701b1c |
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22-May-2019 |
Philippe Mazenauer <philippe.mazenauer@outlook.de> |
arm: add missing include platform-data/atmel.h Include corresponding headerfile <linux/platform-data/atmel.h> for function at91_suspend_entering_slow_clock(). ../arch/arm/mach-at91/pm.c:279:5: warning: no previous prototype for ‘at91_suspend_entering_slow_clock’ [-Wmissing-prototypes] int at91_suspend_entering_slow_clock(void) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Signed-off-by: Philippe Mazenauer <philippe.mazenauer@outlook.de> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
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2874c5fd |
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27-May-2019 |
Thomas Gleixner <tglx@linutronix.de> |
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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ba5e60c9 |
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02-Apr-2019 |
Peng Hao <peng.hao2@zte.com.cn> |
arm/mach-at91/pm : fix possible object reference leak of_find_device_by_node() takes a reference to the struct device when it finds a match via get_device. When returning error we should call put_device. Reviewed-by: Mukesh Ojha <mojha@codeaurora.org> Signed-off-by: Peng Hao <peng.hao2@zte.com.cn> Signed-off-by: Ludovic Desroches <ludovic.desroches@microchip.com>
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eaedc0d3 |
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14-Feb-2019 |
Claudiu Beznea <claudiu.beznea@microchip.com> |
ARM: at91: pm: add ULP1 support for SAM9X60 Add ULP1 support for SAM9X60. In pm_suspend.S enable RC oscillator in PMC if it is not enabled. At resume the state before suspend is restored. Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Acked-by: Stephen Boyd <sboyd@kernel.org> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Signed-off-by: Ludovic Desroches <ludovic.desroches@microchip.com>
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#
a958156d |
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14-Feb-2019 |
Claudiu Beznea <claudiu.beznea@microchip.com> |
ARM: at91: pm: add support for per SoC wakeup source configuration Add support for per SoC wakeup source configuration. In this way we could have per SoC wakeup sources, shutdown controller and power management controller configurations for ULP1 power management mode. Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Signed-off-by: Ludovic Desroches <ludovic.desroches@microchip.com>
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2fa86e52 |
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14-Feb-2019 |
Claudiu Beznea <claudiu.beznea@microchip.com> |
ARM: at91: pm: keep at91_pm_backup_init() only for SAMA5D2 SoCs In at91_pm_backup_init() return if it is not about SAMA5D2 SoCs. Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Signed-off-by: Ludovic Desroches <ludovic.desroches@microchip.com>
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01c7031c |
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14-Feb-2019 |
Claudiu Beznea <claudiu.beznea@microchip.com> |
ARM: at91: pm: initial PM support for SAM9X60 Add initial PM support for SAM9X60. This include idle, WFI and ULP0. Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Signed-off-by: Ludovic Desroches <ludovic.desroches@microchip.com>
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#
c3f5b8fd |
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14-Feb-2019 |
Claudiu Beznea <claudiu.beznea@microchip.com> |
ARM: at91: pm: introduce at91_soc_pm structure To have per SoC PM information add a new structure which embed a member of type struct at91_pm_data. This will allow easy addition of new information without contaminate struct at91_pm_data that is passed to the last phase suspend function (at91_suspend_sram_fn). Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Signed-off-by: Ludovic Desroches <ludovic.desroches@microchip.com>
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95590a62 |
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16-Aug-2018 |
zhong jiang <zhongjiang@huawei.com> |
ARM: at91: pm: call put_device instead of of_node_put in at91_pm_config_ws of_find_device_by_node takes a reference to the struct device when it finds a match via get_device. but it fails to put_device in at91_pm_config_ws, for_each_matching_node_and_match will get and put the node properly, there is no need to call the of_put_node. Therefore, just call put_device instead of of_node_put in at91_pm_config_ws. Fixes: d7484f5c6b3b ("ARM: at91: pm: configure wakeup sources for ULP1 mode") Suggested-by: Claudiu Beznea <Claudiu.Beznea@microchip.com> Signed-off-by: zhong jiang <zhongjiang@huawei.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
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#
1e1f808f |
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08-Aug-2018 |
Claudiu Beznea <claudiu.beznea@microchip.com> |
ARM: at91: pm: remove pm_bu initialization in at91_pm_backup_init() There is no need to initialize pm_bu since it is used only if backup mode is selected. In case backup mode initialization fails (which means pm_bu is invalid) the ULP0 mode will be selected. Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
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#
d7484f5c |
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17-Jul-2018 |
Claudiu Beznea <claudiu.beznea@microchip.com> |
ARM: at91: pm: configure wakeup sources for ULP1 mode Since for ULP1 PM mode of SAMA5D2 the wakeup sources are limited and well known add a method to check if these wakeup sources are defined by user (either via DT or filesystem). In case there are no wakeup sources defined for ULP1 the PM suspend will fail, otherwise these will be configured in fast startup registers of PMC. Since wakeup sources of ULP1 need also to be configured in SHDWC registers the code was a bit changed to map the SHDWC also in case ULP1 is requested by user (this was done in the initialization phase). In case the ULP1 initialization fails the ULP0 mode is used (this mode was also used in case backup mode initialization failed). Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
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#
5b56c182 |
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17-Jul-2018 |
Wenyou Yang <wenyou.yang@atmel.com> |
ARM: at91: pm: Add ULP1 mode support In the ULP1 mode, in order to achieve the lowest power consumption with the system in retention mode and be able to resume on the wake up events, all the clocks are shut off, inclusive the embedded 12MHz RC oscillator, and the number of wake up sources is limited as well. When the wake up event is asserted, the embedded 12MHz RC oscillator restarts automatically. The ULP1 (Ultra Low-power mode 1) is introduced by SAMA5D2. The previous size of pm_suspend.o was 2148 bytes. With the addition of ULP1 mode the new size of pm_suspend.o raised at 2456 bytes. Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com> Signed-off-by: Ludovic Desroches <ludovic.desroches@microchip.com> [claudiu.beznea@microchip.com: aligned with 4.18-rc1] Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
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#
514e2a29 |
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17-Jul-2018 |
Claudiu Beznea <claudiu.beznea@microchip.com> |
ARM: at91: pm: Use ULP0 naming instead of slow clock Switch to use ULP0 naming instead of slow clock naming for power modes, to be as closed as possible to datasheet. This commit does the necessary renaming and macro addition to be as close as possible to the namings from [1]. [1] https://lore.kernel.org/lkml/1470650705-31418-3-git-send-email-wenyou.yang@atmel.com Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
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#
91f87180 |
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07-Jun-2018 |
Alexandre Belloni <alexandre.belloni@bootlin.com> |
ARM: at91: fix USB clock detection handling Add more compatibles to be able to correct the USB clock detection. at91sam9261 and at91sam9263 have the same PMC_SCSR layout as at91sam9260. at91sam9rl doesn't have any USB clock. Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
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#
093d79f6 |
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24-Aug-2017 |
Alexandre Belloni <alexandre.belloni@bootlin.com> |
ARM: at91: Replace uses of virt_to_phys with __pa_symbol The PM code wrongly uses virt_to_phys() instead of __pa_symbol() and was not updated by commit 64fc2a947a98 ("ARM: 8641/1: treewide: Replace uses of virt_to_phys with __pa_symbol") because it was not yet in tree. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
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dbeb0c8e |
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23-Aug-2017 |
Arnd Bergmann <arnd@arndb.de> |
ARM: at91: don't select CONFIG_ARM_CPU_SUSPEND for old platforms My previous patch fixed a link error for all at91 platforms when CONFIG_ARM_CPU_SUSPEND was not set, however this caused another problem on a configuration that enabled CONFIG_ARCH_AT91 but none of the individual SoCs, and that also enabled CPU_ARM720 as the only CPU: warning: (ARCH_AT91 && SOC_IMX23 && SOC_IMX28 && ARCH_PXA && MACH_MVEBU_V7 && SOC_IMX6 && ARCH_OMAP3 && ARCH_OMAP4 && SOC_OMAP5 && SOC_AM33XX && SOC_DRA7XX && ARCH_EXYNOS3 && ARCH_EXYNOS4 && EXYNOS5420_MCPM && EXYNOS_CPU_SUSPEND && ARCH_VEXPRESS_TC2_PM && ARM_BIG_LITTLE_CPUIDLE && ARM_HIGHBANK_CPUIDLE && QCOM_PM) selects ARM_CPU_SUSPEND which has unmet direct dependencies (ARCH_SUSPEND_POSSIBLE) arch/arm/kernel/sleep.o: In function `cpu_resume': (.text+0xf0): undefined reference to `cpu_arm720_suspend_size' arch/arm/kernel/suspend.o: In function `__cpu_suspend_save': suspend.c:(.text+0x134): undefined reference to `cpu_arm720_do_suspend' This improves the hack some more by only selecting ARM_CPU_SUSPEND for the part that requires it, and changing pm.c to drop the contents of unused init functions so we no longer refer to cpu_resume on at91 platforms that don't need it. Fixes: cc7a938f5f30 ("ARM: at91: select CONFIG_ARM_CPU_SUSPEND") Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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#
0527873b |
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11-May-2017 |
Arnd Bergmann <arnd@arndb.de> |
ARM: remove duplicate 'const' annotations' gcc-7 warns about some declarations that are more 'const' than necessary: arch/arm/mach-at91/pm.c:338:34: error: duplicate 'const' declaration specifier [-Werror=duplicate-decl-specifier] static const struct of_device_id const ramc_ids[] __initconst = { arch/arm/mach-bcm/bcm_kona_smc.c:36:34: error: duplicate 'const' declaration specifier [-Werror=duplicate-decl-specifier] static const struct of_device_id const bcm_kona_smc_ids[] __initconst = { arch/arm/mach-spear/time.c:207:34: error: duplicate 'const' declaration specifier [-Werror=duplicate-decl-specifier] static const struct of_device_id const timer_of_match[] __initconst = { arch/arm/mach-omap2/prm_common.c:714:34: error: duplicate 'const' declaration specifier [-Werror=duplicate-decl-specifier] static const struct of_device_id const omap_prcm_dt_match_table[] __initconst = { arch/arm/mach-omap2/vc.c:562:35: error: duplicate 'const' declaration specifier [-Werror=duplicate-decl-specifier] static const struct i2c_init_data const omap4_i2c_timing_data[] __initconst = { The ones in arch/arm were apparently all introduced accidentally by one commit that correctly marked a lot of variables as __initconst. Fixes: 19c233b79d1a ("ARM: appropriate __init annotation for const data") Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Nicolas Pitre <nico@linaro.org> Acked-by: Florian Fainelli <f.fainelli@gmail.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Acked-by: Krzysztof Hałasa <khalasa@piap.pl> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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#
28732238 |
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26-Apr-2017 |
Alexandre Belloni <alexandre.belloni@bootlin.com> |
ARM: at91: pm: fallback to slowclock when backup mode fails If the backup sram allocation fails, ensure we can suspend by falling back to the usual slow clock mode. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Acked-by: Wenyou Yang <wenyou.yang@atmel.com>
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#
7693e18e |
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26-Apr-2017 |
Alexandre Belloni <alexandre.belloni@bootlin.com> |
ARM: at91: pm: allow selecting standby and suspend modes While we can only select between "standby" and "mem" states for power management, the atmel platforms can actually support more modes. For both standby and mem, allow selecting which mode will be used using the atmel.pm_modes kernel parameter. By default, keep the current modes. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Acked-by: Wenyou Yang <wenyou.yang@atmel.com>
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24a0f5c5 |
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26-Sep-2016 |
Alexandre Belloni <alexandre.belloni@bootlin.com> |
ARM: at91: pm: Add sama5d2 backup mode The sama5d2 has a mode were it is possible to cut power to the SoC while keeping the RAM in self refresh. Resuming from that mode needs support in the firmware/bootloader. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Acked-by: Wenyou Yang <wenyou.yang@atmel.com>
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e56d75a9 |
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01-Feb-2017 |
Alexandre Belloni <alexandre.belloni@bootlin.com> |
ARM: at91: pm: Remove at91_pm_set_standby Merge at91_pm_set_standby() in at91_dt_ramc as this is the only callsite. That moves it to the init section. Acked-by: Wenyou Yang <wenyou.yang@atmel.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
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#
13469192 |
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01-Feb-2017 |
Alexandre Belloni <alexandre.belloni@bootlin.com> |
ARM: at91: pm: Merge all at91sam9*_pm_init The PM initialization is now identical for all at91sam9. Merge the functions. Acked-by: Wenyou Yang <wenyou.yang@atmel.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
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13f16017 |
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01-Feb-2017 |
Alexandre Belloni <alexandre.belloni@bootlin.com> |
ARM: at91: pm: Tie the USB clock mask to the pmc The USB clocks mask (uhp_udp_mask) depends on the pmc. Tie it to the pmc id instead of the SoC. Acked-by: Wenyou Yang <wenyou.yang@atmel.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
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aab02d61 |
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01-Feb-2017 |
Alexandre Belloni <alexandre.belloni@bootlin.com> |
ARM: at91: pm: Tie the memory controller type to the ramc id Instead of relying on the SoC type to select the memory controller type, use the device tree ids as they are parsed anyway. Acked-by: Wenyou Yang <wenyou.yang@atmel.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
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#
56387634 |
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01-Feb-2017 |
Alexandre Belloni <alexandre.belloni@bootlin.com> |
ARM: at91: pm: Workaround DDRSDRC self-refresh bug with LPDDR1 memories. As already explained for pm_suspend.S, the DDRSDR controller fails to put LPDDR1 memories in self-refresh. Force the controller to think it has DDR2 memories during the self-refresh period, as the DDR2 self-refresh spec is equivalent to LPDDR1, and is correctly implemented in the controller. Acked-by: Wenyou Yang <wenyou.yang@atmel.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
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5a2d4f05 |
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01-Feb-2017 |
Alexandre Belloni <alexandre.belloni@bootlin.com> |
ARM: at91: pm: Simplify at91rm9200_standby Since 2008, AT91_MC_SDRAMC_LPR is set to 0 at kernel initialization. There is no use saving, changing and restoring it. Acked-by: Wenyou Yang <wenyou.yang@atmel.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
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#
65cc1a59 |
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31-Jan-2017 |
Alexandre Belloni <alexandre.belloni@bootlin.com> |
ARM: at91: pm: Use struct at91_pm_data in pm_suspend.S The number of register we can safely pass to at91_pm_suspend_in_sram is limited. Instead, pass the address to the at91_pm_data structure. The offsets are automatically generated to avoid hardcoding them. Acked-by: Wenyou Yang <wenyou.yang@atmel.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
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#
9e07c3ce |
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31-Jan-2017 |
Alexandre Belloni <alexandre.belloni@bootlin.com> |
ARM: at91: pm: Move global variables into at91_pm_data Instead of having separate global variables to hold IP addresses, move them to struct at91_pm_data. Acked-by: Wenyou Yang <wenyou.yang@atmel.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
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#
4d767bc3 |
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31-Jan-2017 |
Alexandre Belloni <alexandre.belloni@bootlin.com> |
ARM: at91: pm: Move at91_ramc_read/write to pm.c Those macros are only used in pm.c, move them there so we can remove the test on __ASSEMBLY__. Acked-by: Wenyou Yang <wenyou.yang@atmel.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
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#
9824c447 |
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31-Jan-2017 |
Alexandre Belloni <alexandre.belloni@bootlin.com> |
ARM: at91: pm: Cleanup headers Remove unnecessary header inclusions and reorder the remaining ones. Acked-by: Wenyou Yang <wenyou.yang@atmel.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
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#
60b89f19 |
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14-Mar-2017 |
Nicolas Ferre <nicolas.ferre@microchip.com> |
ARM: at91: pm: cpu_idle: switch DDR to power-down mode On some DDR controllers, compatible with the sama5d3 one, the sequence to enter/exit/re-enter the self-refresh mode adds more constrains than what is currently written in the at91_idle driver. An actual access to the DDR chip is needed between exit and re-enter of this mode which is somehow difficult to implement. This sequence can completely hang the SoC. It is particularly experienced on parts which embed a L2 cache if the code run between IDLE calls fits in it... Moreover, as the intention is to enter and exit pretty rapidly from IDLE, the power-down mode is a good candidate. So now we use power-down instead of self-refresh. As we can simplify the code for sama5d3 compatible DDR controllers, we instantiate a new sama5d3_ddr_standby() function. Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com> Cc: <stable@vger.kernel.org> # v4.1+ Fixes: 017b5522d5e3 ("ARM: at91: Add new binding for sama5d3-ddramc") Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
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#
6cc7fbdf |
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26-Sep-2016 |
Alexandre Belloni <alexandre.belloni@bootlin.com> |
ARM: at91: pm: remove useless extern definition at91_ramc_base is local to pm.c, remove its definition in pm.h Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
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#
ab6778ee |
|
17-Jun-2016 |
Ben Dooks <ben.dooks@codethink.co.uk> |
ARM: at91: fix warnings in pm.c Fix a pair of missing statics on un-exported functions and include <linux/platform_data/atmel.h> to provide the declaration of at91_suspend_entering_slow_clock() to fix the following sparse warnings: arch/arm/mach-at91/pm.c:127:5: warning: symbol 'at91_suspend_entering_slow_clock' was not declared. Should it be static? arch/arm/mach-at91/pm.c:358:6: warning: symbol 'at91rm9200_idle' was not declared. Should it be static? arch/arm/mach-at91/pm.c:367:6: warning: symbol 'at91sam9_idle' was not declared. Should it be static? Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
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#
fbc7edca |
|
29-Sep-2015 |
Alexandre Belloni <alexandre.belloni@bootlin.com> |
ARM: at91: pm: move idle functions to pm.c Avoid using code from clk/at91 for PM. This also has the bonus effect of setting arm_pm_idle for sama5 platforms. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
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#
5737b73e |
|
29-Sep-2015 |
Alexandre Belloni <alexandre.belloni@bootlin.com> |
ARM: at91: pm: find and remap the pmc To avoid relying on at91_pmc_read(), find the pmc node and remap it locally. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
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#
997ff83b |
|
29-Sep-2015 |
Alexandre Belloni <alexandre.belloni@bootlin.com> |
ARM: at91: pm: simply call at91_pm_init at91_pm_init() doesn't return a value, as is the case for its callers, simply call it instead of returning its non-existent return value. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
|
#
8423536f |
|
01-Dec-2015 |
Ludovic Desroches <ludovic.desroches@atmel.com> |
ARM: at91: fix pinctrl driver selection Move the selection of the pinctrl driver to SoC family level since we have two pinctrl drivers. It is useless to select one which is not compatible with the SoC. [abelloni: fixed pm.c when only sama2d2 is selected] Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
|
#
73858173 |
|
04-Sep-2015 |
Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com> |
genalloc: add name arg to gen_pool_get() and devm_gen_pool_create() This change modifies gen_pool_get() and devm_gen_pool_create() client interfaces adding one more argument "name" of a gen_pool object. Due to implementation gen_pool_get() is capable to retrieve only one gen_pool associated with a device even if multiple gen_pools are created, fortunately right at the moment it is sufficient for the clients, hence provide NULL as a valid argument on both producer devm_gen_pool_create() and consumer gen_pool_get() sides. Because only one created gen_pool per device is addressable, explicitly add a restriction to devm_gen_pool_create() to create only one gen_pool per device, this implies two possible error codes returned by the function, account it on client side (only misc/sram). This completes client side changes related to genalloc updates. [akpm@linux-foundation.org: gen_pool_get() cleanup] Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com> Cc: Philipp Zabel <p.zabel@pengutronix.de> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Russell King <linux@arm.linux.org.uk> Cc: Nicolas Ferre <nicolas.ferre@atmel.com> Cc: Alexandre Belloni <alexandre.belloni@free-electrons.com> Cc: Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com> Cc: Shawn Guo <shawnguo@kernel.org> Cc: Sascha Hauer <kernel@pengutronix.de> Cc: Mauro Carvalho Chehab <mchehab@osg.samsung.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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#
19c233b7 |
|
27-Jul-2015 |
Nicolas Pitre <nico@fluxnic.net> |
ARM: appropriate __init annotation for const data Init data marked const should be annotated with __initconst for correctness and not __initdata. In some cases the array gathering references to that data has to be marked const as well. This fixes LTO builds that otherwise fail with section mismatch errors. Signed-off-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Olof Johansson <olof@lixom.net>
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#
0030edf2 |
|
30-Jun-2015 |
Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com> |
genalloc: rename dev_get_gen_pool() to gen_pool_get() To be consistent with other genalloc interface namings, rename dev_get_gen_pool() to gen_pool_get(). The original omitted "dev_" prefix is removed, since it points to argument type of the function, and so it does not bring any useful information. [akpm@linux-foundation.org: update arch/arm/mach-socfpga/pm.c] Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> Cc: Philipp Zabel <p.zabel@pengutronix.de> Cc: Shawn Guo <shawn.guo@linaro.org> Cc: Sascha Hauer <kernel@pengutronix.de> Cc: Alexandre Belloni <alexandre.belloni@free-electrons.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: Mauro Carvalho Chehab <mchehab@osg.samsung.com> Cc: Vinod Koul <vinod.koul@intel.com> Cc: Takashi Iwai <tiwai@suse.de> Cc: Jaroslav Kysela <perex@perex.cz> Cc: Mark Brown <broonie@kernel.org> Cc: Nicolas Ferre <nicolas.ferre@atmel.com> Cc: Alan Tull <atull@opensource.altera.com> Cc: Dinh Nguyen <dinguyen@opensource.altera.com> Cc: Kevin Hilman <khilman@linaro.org> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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#
d7d45f25 |
|
16-Mar-2015 |
Alexandre Belloni <alexandre.belloni@bootlin.com> |
ARM: at91/pm: use the atmel-mc syscon defines Use the defines from atmel-mc.h instead of at91rm9200_sdramc.h Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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#
a18d0699 |
|
16-Mar-2015 |
Alexandre Belloni <alexandre.belloni@bootlin.com> |
ARM: at91/pm: move the standby functions to pm.c The standby functions are now only used in pm.c, move them there. Also, they are not inlined as a pointer to those functions is passed to the cpuidle driver. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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#
23b84082 |
|
13-Mar-2015 |
Alexandre Belloni <alexandre.belloni@bootlin.com> |
ARM: at91: remove hardware.h hardware.h is now mostyl unused, move the remaining declarations to pm.c and remove it. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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#
f56d8f7c |
|
13-Mar-2015 |
Alexandre Belloni <alexandre.belloni@bootlin.com> |
ARM: at91: remove useless mach/cpu.h mach/cpu.h is not used anymore, remove it. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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#
385acc0d |
|
08-Mar-2015 |
Wenyou Yang <wenyou.yang@atmel.com> |
ARM: at91/pm: flush data cache and clean, invalidate and disable the L2 cache Flush data cache, and clean, invalidate and disable the L2 cache before going to suspend. Restore the L2 cache configuration and re-enable the L2 cache after waking up. Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com> Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Tested-by: Sylvain Rochet <sylvain.rochet@finsecur.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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#
e32d995c |
|
08-Mar-2015 |
Wenyou Yang <wenyou.yang@atmel.com> |
ARM: at91/pm: remove unused void (*at91_pm_standby)(void) Because the standby mode use the same sram function as the suspend to memory mode, void (*at91_pm_standby)(void) doesn't need, remove it. Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com> Tested-by: Sylvain Rochet <sylvain.rochet@finsecur.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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#
5726a8b9 |
|
08-Mar-2015 |
Wenyou Yang <wenyou.yang@atmel.com> |
ARM: at91/pm: rename function name: at91_slow_clock() --> at91_pm_suspend_sram_fn() As the file name is renamed, rename the function name at91_slow_clock() --> at91_pm_suspend_sram_fn(), rename the function handler's name at the same time. Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com> Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Tested-by: Sylvain Rochet <sylvain.rochet@finsecur.com> [nicolas.ferre@atmel.com: little update of the commit message] Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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#
23be4be5 |
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08-Mar-2015 |
Wenyou Yang <wenyou.yang@atmel.com> |
ARM: at91/pm: standby mode uses same sram function as suspend to memory mode To simply the PM code, the suspend to standby mode uses same sram function as the suspend to memory mode, running in the internal SRAM, instead of the respective code for each mode. For the suspend to standby mode, the master clock doesn't switch to the slow clock, and PLLA and the main oscillator doesn't turn off as well. Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com> Tested-by: Sylvain Rochet <sylvain.rochet@finsecur.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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#
d94e688c |
|
08-Mar-2015 |
Wenyou Yang <wenyou.yang@atmel.com> |
ARM: at91/pm: move the copying the sram function to the sram initialization phase To decrease the suspend time, move copying the sram function to the sram initialization phase, instead of every time go to suspend. In the meanwhile, substitute fncpy() for memcpy(). If there is no sram allocated for PM, the PM is not supported. Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com> Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Tested-by: Sylvain Rochet <sylvain.rochet@finsecur.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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#
09fc78a6 |
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08-Mar-2015 |
Wenyou Yang <wenyou.yang@atmel.com> |
ARM: at91/pm: remove CONFIG_AT91_SLOW_CLOCK config option The slow clock always exists, selecting CONFIG_AT91_SLOW_CLOCK config is unnecessary for the suspend to memory mode. For this mode the master clock should always switch to the slow clock. Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com> Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Tested-by: Sylvain Rochet <sylvain.rochet@finsecur.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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#
047794e1 |
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03-Mar-2015 |
Wenyou Yang <wenyou.yang@atmel.com> |
ARM: at91: pm: change at91_pm_set_standby() to static Since at91_pm_set_standby() will not be used out of the pm.c file, change its attribute from extern to static, remove its declaration as well. Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com> Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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#
4a031f7d |
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03-Mar-2015 |
Alexandre Belloni <alexandre.belloni@bootlin.com> |
ARM: at91: pm: fix SRAM allocation On some platforms, there are multiple SRAM nodes defined in the device tree but some of them are disabled, leading to allocation failure. Try to find the first enabled SRAM node and allocate from it. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Tested-by: Wenyou Yang <wenyou.yang@atmel.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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#
444d2d33 |
|
18-Feb-2015 |
Uwe Kleine-König <u.kleine-koenig@pengutronix.de> |
ARM: make of_device_ids const of_device_ids (i.e. compatible strings and the respective data) are not supposed to change at runtime. All functions working with of_device_ids provided by <linux/of.h> work with const of_device_ids. So mark the non-const structs in arch/arm as const, too. While at it also add some __initconst annotations. Acked-by: Jason Cooper <jason@lakedameon.net> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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#
ad3fc3e3 |
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27-Jan-2015 |
Nicolas Ferre <nicolas.ferre@microchip.com> |
ARM: at91/trivial: unify functions and machine names Remove the string "(Device Tree)" after the machine name because all AT91 machines use the DT nowadays. Also change some function names to unify following the convention: - at91sam9xxx aren't named sam9, 9xxx but with the full name - sama5 are the ones that don't have the at91 prefix anymore. Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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#
827de1f1 |
|
27-Jan-2015 |
Alexandre Belloni <alexandre.belloni@bootlin.com> |
ARM: at91: remove at91_dt_initialize and machine init_early() Move the ramc initialization to pm.c as it is the only user left. This allows us to get rid of at91_dt_initialize() that was the only one called by the init_early() function pointer of struct machine_desc. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> [nicolas.ferre@atmel.com: adapt patch to newer series] Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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#
bf02280e |
|
22-Jan-2015 |
Nicolas Ferre <nicolas.ferre@microchip.com> |
ARM: at91: fix PM initialization for newer SoCs Newer SoCs: at91sam9x5, at91sam9n12, sama5d3 and sama5d4 embed a DDR controller and have a different PMC status register layout than the at91sam9g45. Create another at91_sam9x5_pm_init() function to match this compatibility. Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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#
4db0ba22 |
|
15-Jan-2015 |
Alexandre Belloni <alexandre.belloni@bootlin.com> |
ARM: at91: pm: prepare for multiplatform Split at91_pm_init() in three variants that are called by the respective SoCs .init_machine. This allows to remove the of_machine_is_compatible() calls and move at91_pm_init() out of arch_initcall() which is required for multiplatform. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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#
a63ba411 |
|
15-Jan-2015 |
Alexandre Belloni <alexandre.belloni@bootlin.com> |
ARM: at91: pm: add UDP and UHP checks to newer SoCs Check UDP and UHP on sam9x5, sam9n12 and the sama5 series. Check UHP on the sam9g45. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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#
d2e46790 |
|
15-Jan-2015 |
Alexandre Belloni <alexandre.belloni@bootlin.com> |
ARM: at91: pm: use the mmio-sram pool to access SRAM Now that the SRAM is part of a genpool, use it to allocate memory to use for the slowclock implementation. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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#
f5598d34 |
|
15-Jan-2015 |
Alexandre Belloni <alexandre.belloni@bootlin.com> |
ARM: at91: pm: rework cpu detection Store SoC differences in a struct to remove cpu_is_* usage. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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#
85c4b31e |
|
01-Dec-2014 |
Arnd Bergmann <arnd@arndb.de> |
ARM: at91: remove old AT91-specific drivers GPIO and LED drivers were replaced by generic ones for DT boards. These drivers were remaining: delete them now. Modifications are also done on the corresponding header files. Signed-off-by: Arnd Bergmann <arnd@arndb.de> [nicolas.ferre@atmel.com: split patch] Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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#
1ccdde05 |
|
27-Nov-2014 |
Nicolas Ferre <nicolas.ferre@microchip.com> |
ARM: at91: remove legacy IRQ driver and related code Remove irc.c and associated header file. The related code was idendified by the CONFIG_OLD_IRQ_AT91 option that was removed previously. It has been spotted by following coccinelle semantic match: @rule1@ expression E; statement S; @@ ( - if (IS_ENABLED(CONFIG_OLD_IRQ_AT91)) S | - if (IS_ENABLED(CONFIG_OLD_IRQ_AT91) && E) S ) Cc: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> Acked-by: Boris BREZILLON <boris.brezillon@free-electrons.com>
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#
572e85e3 |
|
03-Jul-2014 |
Maxime Ripard <mripard@kernel.org> |
ARM: at91/pm: Remove show_reset_status function Both the reset and poweroff drivers are now implementing what the show_reset_status function used to do. Hence, we can remove this rather hackish function that prevents us from doing further cleanup. Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
|
#
07192604 |
|
10-Jul-2014 |
Boris Brezillon <bbrezillon@kernel.org> |
ARM: at91: enclose at91_aic_xx calls in IS_ENABLED(CONFIG_OLD_IRQ_AT91) blocks Enclose at91_aic_xx calls in IS_ENABLED(CONFIG_OLD_IRQ_AT91) blocks in order to prepare migration to the new AIC driver. In the new AIC driver the suspend/resume functions are called by the generic irq framework and are no longer needed in the PM specific code. Moreover, the new AIC driver no longer exposes the at91_aic_base variable which is used by the at91_aic_read functions. Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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#
cf2e933c |
|
27-Mar-2014 |
Linus Walleij <linus.walleij@linaro.org> |
ARM: at91: localize GPIO header This moves the <mach/gpio.h> header in the AT91 platform down into the machine directory and removes the reliance on MACH_NEED_GPIO_H from the AT91. This does not move the platform to GENERIC_GPIO but localize the remaining work to be done for this to the mach-at91 folder. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> [nicolas.ferre@atmel.com: adapt to newer kernel, add rsi-ews board] Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
|
#
ac11a1d4 |
|
14-Nov-2013 |
Uwe Kleine-König <u.kleine-koenig@pengutronix.de> |
ARM: at91: don't use <mach/timex.h> The platform specific <mach/timex.h> will be removed in a later patch. So move its only still used symbol to a different header specific for the only machine still using it. Also add a few explicit includes of <mach/hardware.h> that are implicitly available through <mach/timex.h>. Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
|
#
83301480 |
|
12-Dec-2013 |
Nicolas Ferre <nicolas.ferre@microchip.com> |
ARM: at91: remove AT91_PROGRAMMABLE_CLOCKS configuration option This AT91 specific Kconfig option removed the code that dealt with programmable clocks. Each AT91 SoC embeds programmable clocks and there is little gain to remove this code in case that such a clock is not used. If this option is not selected, it causes certain drivers to fail to build. We simply remove this option instead of adding code just to build a workaround. Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Kevin Hilman <khilman@linaro.org>
|
#
2edb90ae |
|
11-Oct-2013 |
Boris Brezillon <bbrezillon@kernel.org> |
ARM: at91: move at91_pmc.h to include/linux/clk/at91_pmc.h This patch moves at91_pmc.h header from machine specific directory (arch/arm/mach-at91/include/mach/at91_pmc.h) to clk include directory (include/linux/clk/at91_pmc.h). We need this to avoid reference to machine specific headers in clk drivers. Signed-off-by: Boris BREZILLON <b.brezillon@overkiz.com> Acked-by: Felipe Balbi <balbi@ti.com> Acked-by: Mike Turquette <mturquette@linaro.org> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
|
#
5ad945ea |
|
22-Sep-2013 |
Daniel Lezcano <daniel.lezcano@linaro.org> |
ARM: at91: cpuidle: Convert to platform driver Using the platform driver model is a good way to separate the cpuidle specific code from the low level pm code. It allows to remove the dependency between these two components. The platform_device is located in the pm code and a 'set' function has been added to set the standby function from the AT91_SOC_START initialization function. Each SoC with a cpuidle driver will set the standby function in the platform_data field at init time. Then pm code will register the cpuidle platform device. The cpuidle driver will register the platform_driver and use the device's platform_data as a standby callback in the idle path. The at91_pm_enter function contains a { if then else } based on cpu_is_xx similar to what was in cpuidle. This is considered dangerous when adding a new SoC. Like the cpuidle driver, a standby ops is defined and assigned when the SoC init function specifies what is its standby function and reused in the at91_pm_enter's 'case' block. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
|
#
546c830c |
|
01-Jun-2013 |
Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> |
ARM: at91: fix at91_extern_irq usage for non-dt boards Since 4b68520dc0ec96153bc0d87bca5ffba508edfcf ARM: at91: add AIC5 support we allocate the at91_extern_irq. This patch makes it static and stores the non-dt extern irq in the soc structure. It is then possible to use a at91_get_extern_irq() function to get the value for outside of the irq driver. It is useful for passing its value to at91_aic_init(). Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Acked-by: Ludovic Desroches <ludovic.desroches@atmel.com> [nicolas.ferre@atmel.com: rework commit message] Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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#
f5fa4098 |
|
25-Jan-2013 |
Arnd Bergmann <arnd@arndb.de> |
ARM: at91: suspend both memory controllers on at91sam9263 For the past three years, we have had a #warning in mach-at91 about the sdram_selfrefresh_enable or at91sam9_standby functions possibly not working on at91sam9263. In the meantime a function was added to do the right thing on at91sam9g45, which looks like it should also work on '9263. Signed-off-by: Arnd Bergmann <arnd@arndb.de> [nicolas.ferre@atmel.com: remove paragraph in commit message] Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
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#
647f8d94 |
|
08-Mar-2013 |
Ludovic Desroches <ludovic.desroches@atmel.com> |
ARM: at91: add gpio suspend/resume support when using pinctrl gpio suspend/resume and wakeup sources where not managed when using pinctrl so it was impossible to wake up the system with a gpio. Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com> Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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#
f0995d08 |
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29-Oct-2012 |
Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> |
arm: at91: move reset controller header to arm/arm/mach-at91 Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
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#
176bdd2c |
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29-Oct-2012 |
Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> |
arm: at91: move at91_shdwc.h to arch/arm/mach-at91 This is only used by old boards style or via core code. Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
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#
a510b9ba |
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29-Oct-2012 |
Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> |
arm: at91 move at91_aic.h to arch/arm/mach-at91 as this is only used board old style board old mach code Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
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#
9e0e4e11 |
|
30-Apr-2012 |
Arnd Bergmann <arnd@arndb.de> |
ARM: at91: unused variable in at91_pm_verify_clocks The code using the variable 'i' in this function is conditional which results in a harmless compiler warning. Using the IS_ENABLED macro instead of #ifdef makes the code look nicer and gets rid of the warning. Without this patch, building at91sam9263_defconfig results in: /home/arnd/linux-arm/arch/arm/mach-at91/pm.c: In function 'at91_pm_verify_clocks': /home/arnd/linux-arm/arch/arm/mach-at91/pm.c:137:6: warning: unused variable 'i' [-Wunused-variable] Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
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#
8fe82a55 |
|
21-Jun-2012 |
Ludovic Desroches <ludovic.desroches@atmel.com> |
ARM: at91: sparse irq support Enable sparse irq support for multisoc image. It involves to add the NR_IRQS_LEGACY offset to static SoC irq number definitions since NR_IRQS_LEGACY irq descs are allocated before AIC requests irq descs allocation. Move NR_AIC_IRQS macro to a more appropiate place with the purpose to remove mach/irqs.h later. Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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#
efd09165 |
|
12-Feb-2012 |
Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> |
ARM: at91: pm select memory controler at runtime Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> [nicolas.ferre@atmel.com: add cpuidle modification] Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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#
a7776ec6 |
|
02-Mar-2012 |
Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> |
ARM: at91: add ram controller DT support We can now drop the call to ioremap_registers() as we have the binding for the SDRAM/DDR Controller. Drop ioremap_registers() for sam9x5 too. Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Acked-by: Rob Herring <rob.herring@calxeda.com> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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#
b5514952 |
|
24-Nov-2011 |
Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> |
ARM: at91/PMC: make register base soc independent Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> Reviewed-by: Ryan Mallon <rmallon@gmail.com>
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#
fb7e197b |
|
22-Feb-2012 |
Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> |
ARM: at91/pm_slowclock: add runtime detection of memory contoller This will allow to have all SoC in one kernel image. Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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#
f363c407 |
|
12-Feb-2012 |
Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> |
ARM: at91: make sdram/ddr register base soc independent Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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#
1a269ade |
|
15-Nov-2011 |
Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> |
ARM: at91: move at91rm9200 sdramc defines to at91rm9200_sdramc.h This cleanup is done to allow to have multiple SoC in the same image. Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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#
8ff12ad3 |
|
22-Feb-2012 |
Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> |
ARM: at91/pm_slowclock: function slow_clock() accepts parameters Change slow_clock()/at91_slow_clock() prototype to accept the PMC base address and one or two RAM controller addresses by parameters. The r0, r1 and r2 registers are used differently and preserved during function call. Those values are defined in pm.c and slow_clock() function is called from there with its new parameters. This will allow to have a soc independent pm_slowclock. Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Ached-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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#
00482a40 |
|
24-Jan-2012 |
Daniel Lezcano <daniel.lezcano@linaro.org> |
ARM: at91: implement the standby function for pm/cpuidle This patch groups the self-refresh on/cpu_do_idle/self-refresh off into a single 'standby' function. The standby routine for rm9200 has been turned into an asm routine to have a better control of the self refresh and to prevent a memory access when running this code. Draining the write buffer is done automatically when switching for the self refresh on sam9, so the instruction is added to the rm9200 only. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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#
b59160f6 |
|
24-Jan-2012 |
Daniel Lezcano <daniel.lezcano@linaro.org> |
ARM: at91: remove wait_for_interrupt definition All the "wait_for_interrupt" definition are aliases to cpu_do_idle. Only the rm9200 has an asm routine to switch to wfi. But the cpu_do_idle for this platform has exactly the same asm routine. arch/arm/mm/proc-arm920.S .. ENTRY(cpu_arm920_do_idle) mcr p15, 0, r0, c7, c0, 4 @ Wait for interrupt .. Then it is safe to invoke cpu_do_idle for this platform. As all the wait_for_interrupts are definition for cpu_do_idle, let's remove it and replace its invokation by cpu_do_idle. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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#
9918ceaf |
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26-Jan-2012 |
Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> |
ARM: at91: code removal of CAP9 SoC Following removal announce and addition to feature-removal-schedule.txt, here is the actual source code deletion for Atmel CAP9 family. Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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#
e9f68b5c |
|
17-Nov-2011 |
Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> |
ARM: at91: make rstc soc independent Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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#
be6d4321 |
|
02-Nov-2011 |
Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> |
ARM: at91: make aic soc independent on all at91 have the Advanced Interrupt Controller starts at address 0xfffff000 Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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#
f22deee5 |
|
31-Oct-2011 |
Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> |
ARM: at91: make shutdown controler soc independent Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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#
2f8163ba |
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26-Jul-2011 |
Russell King <rmk+kernel@arm.linux.org.uk> |
ARM: gpio: convert includes of mach/gpio.h and asm/gpio.h to linux/gpio.h Convert arch/arm includes of mach/gpio.h and asm/gpio.h to linux/gpio.h before we start consolidating the individual platform implementations of the gpio header files. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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#
60063497 |
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26-Jul-2011 |
Arun Sharma <asharma@fb.com> |
atomic: use <linux/atomic.h> This allows us to move duplicated code in <asm/atomic.h> (atomic_inc_not_zero() for now) to <linux/atomic.h> Signed-off-by: Arun Sharma <asharma@fb.com> Reviewed-by: Eric Dumazet <eric.dumazet@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: David Miller <davem@davemloft.net> Cc: Eric Dumazet <eric.dumazet@gmail.com> Acked-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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#
2f55ac07 |
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16-Nov-2010 |
Lionel Debroux <lionel_debroux@yahoo.fr> |
suspend: constify platform_suspend_ops While at it, fix two checkpatch errors. Several non-const struct instances constified by this patch were added after the introduction of platform_suspend_ops in checkpatch.pl's list of "should be const" structs (79404849e90a41ea2109bd0e2f7c7164b0c4ce73). Patch against mainline. Inspired by hunks of the grsecurity patch, updated for newer kernels. Signed-off-by: Lionel Debroux <lionel_debroux@yahoo.fr> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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#
a2a571b7 |
|
22-Oct-2010 |
Nicolas Ferre <nicolas.ferre@microchip.com> |
AT91: pm: make sure that r0 is 0 when dealing with cache operations When using CP15 cache operations (c7), we make sure that Rd (r0) is actually 0 as ARM 926 TRM is saying. Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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#
8aeeda82 |
|
22-Oct-2010 |
Nicolas Ferre <nicolas.ferre@microchip.com> |
AT91: pm: use plain cpu_do_idle() for "wait for interrupt" For power management at91_pm_enter() routine, use the cpu_do_idle() for a rock solid "wait for interrupt" implementation. For AT91SAM9 ARM 926 based chips, we can exceed the cache line length as we can access RAM even while in self-refresh mode. We keep plain access to CP15 for at91rm9200 as this feature is not available: instructions have to be in a single cache line. Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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#
1ea60cf7 |
|
01-Nov-2009 |
Albin Tonnerre <albin.tonnerre@free-electrons.com> |
ARM: 5778/1: AT91: Add cpuidle support This patch adds the support for cpuidle on AT91 SoCs, taken from the cpuidle support in mach-kirkwood. cpuidle needs sdram_selfrefresh_enable and _disable, so move their definition to a separate header file instead of duplicating the code already used in pm.c. Tested-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Albin Tonnerre <albin.tonnerre@free-electrons.com> Acked-by: Andrew Victor <linux@maxim.org.za> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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#
b319ff80 |
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26-Jun-2009 |
Nicolas Ferre <nicolas.ferre@microchip.com> |
[ARM] 5570/1: at91: Support for at91sam9g10: core chip & board support From: Hong Xu <hong.xu@atmel.com> Here are the modification to at91sam9261 files dedicated to the support of at91sam9g10. This direction has been adopted to minimize code duplication. All at91sam9261 drivers are enabled in _devices and board- files. Modificaton to peripherals that support at91sam9g10 will be added in future patches. Signed-off-by: Hong Xu <hong.xu@atmel.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> Acked-by: Andrew Victor <linux@maxim.org.za> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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#
7f96b1ca |
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01-Apr-2009 |
Ryan Mallon <ryan@bluewatersys.com> |
[ARM] 5441/1: Use pr_err on error paths in at91 pm Change pr_debug to pr_err on error paths in the AT91 power management code. All of the errors will result in the cpu not going into the suspend state. This patch makes it possible to identify problems with suspend when power management debugging is not enabled. Signed-off-by: Ryan Mallon <ryan@bluewatersys.com> Acked-by: Andrew Victor <linux@maxim.org.za> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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#
d82ad6d6 |
|
22-Feb-2009 |
Andrei Birjukov <andrei.birjukov@artecdesign.ee> |
[ARM] at91: fix for Atmel AT91 powersaving We've discovered that our AT91SAM9260 board consumed too much power when returning from a slowclock low-power mode. RAM self-refresh is enabled in a bootloader in our case, this is how we saw a difference. Estimated ca. 30mA more on 4V battery than the same state before powersaving. After a small research we found that there seems to be a bogus sdram_selfrefresh_disable() call at the end of at91_pm_enter() call, which overwrites the LPR register with uninitialized value. Please find the suggested patch attached. This patch fixes correct restoring of LPR register of the Atmel AT91 SDRAM controller when returning from a power saving mode. Signed-off-by: Andrei Birjukov <andrei.birjukov@artecdesign.ee> Acked-by: Andrew Victor <linux@maxim.org.za> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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#
fced80c7 |
|
05-Sep-2008 |
Russell King <rmk@dyn-67.arm.linux.org.uk> |
[ARM] Convert asm/io.h to linux/io.h Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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#
a09e64fb |
|
05-Aug-2008 |
Russell King <rmk@dyn-67.arm.linux.org.uk> |
[ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach This just leaves include/asm-arm/plat-* to deal with. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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#
0f8469a5 |
|
03-Aug-2008 |
Russell King <rmk@dyn-67.arm.linux.org.uk> |
[ARM] Eliminate useless includes of asm/mach-types.h There are 43 includes of asm/mach-types.h by files that don't reference anything from that file. Remove these unnecessary includes. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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#
61352667 |
|
10-Jul-2008 |
sedji gaouaou <sedji.gaouaou@atmel.com> |
[ARM] 5130/4: Support for the at91sam9g20 Support for the at91sam9g20 : Atmel 400Mhz ARM 926ej-s SOC. AT91sam9g20 is an evolution of the at91sam9260 with a faster clock speed. We created a new board for this device but based the chip support directly on 9260 files with little updates. Here is the chip page on Atmel wabsite: http://atmel.com/dyn/products/product_card.asp?part_id=4337 Signed-off-by: Sedji Gaouaou <sedji.gaouaou@atmel.com> Signed-off-by: Justin Waters <justin.waters@timesys.com> Acked-by: Andrew Victor <linux@maxim.org.za> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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#
136eb955 |
|
24-Apr-2008 |
David Brownell <david-b@pacbell.net> |
[ARM] 5021/1: at91: buildfix for sam9263 + PM Build fix for power management on at91sam9263: it has two memory controllers instead of just one, so it might have two banks of DRAM to put into selfrefresh mode. For now we continue to assume only the first bank is populated. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Acked-by: Andrew Victor <linux@maxim.org.za> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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#
565ac445 |
|
02-Apr-2008 |
Andrew Victor <linux@maxim.org.za> |
[ARM] 4907/1: [AT91] SAM9/CAP9 reset reason The Reset controller on the SAM9/CAP9 processors will store the reason for the last system reset. On startup, display this information (wakeup signal, RTT alarm, watchdog reset, user reset, etc) Based on patch from David Brownell. Signed-off-by: Andrew Victor <linux@maxim.org.za> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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#
f5d0f457 |
|
02-Apr-2008 |
Andrew Victor <linux@maxim.org.za> |
[ARM] 4906/1: [AT91] SAM9/CAP9 basic power-management Basic power-management (suspend-to-ram) support for Atmel SAM9 and CAP9 processors. Based on comments & patches from Anti Sullin and David Brownell. Signed-off-by: Andrew Victor <linux@maxim.org.za> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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#
c697eece |
|
07-Jan-2008 |
Rafael J. Wysocki <rjw@rjwysocki.net> |
Suspend: Introduce begin() and end() callbacks On ACPI systems the target state set by acpi_pm_set_target() is reset by acpi_pm_finish(), but that need not be called if the suspend fails. All platforms that use the .set_target() global suspend callback are affected by analogous issues. For this reason, we need an additional global suspend callback that will reset the target state regardless of whether or not the suspend is successful. Also, it is reasonable to rename the .set_target() callback, since it will be used for a different purpose on ACPI systems (due to ACPI 1.0x code ordering requirements). Introduce the global suspend callback .end() to be executed at the end of the suspend sequence and rename the .set_target() global suspend callback to .begin(). Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Len Brown <len.brown@intel.com>
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#
2b3b3516 |
|
24-Jan-2008 |
Andrew Victor <linux@maxim.org.za> |
[ARM] 4764/1: [AT91] AT91CAP9 core support Add support for Atmel's AT91CAP9 Customizable Microcontroller family. <http://www.atmel.com/products/AT91CAP/Default.asp> Signed-off-by: Stelian Pop <stelian@popies.net> Signed-off-by: Andrew Victor <linux@maxim.org.za> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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#
26398a70 |
|
18-Oct-2007 |
Rafael J. Wysocki <rjw@rjwysocki.net> |
PM: Rename struct pm_ops and related things The name of 'struct pm_ops' suggests that it is related to the power management in general, but in fact it is only related to suspend. Moreover, its name should indicate what this structure is used for, so it seems reasonable to change it to 'struct platform_suspend_ops'. In that case, the name of the global variable of this type used by the PM core and the names of related functions should be changed accordingly. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@ucw.cz> Cc: Len Brown <lenb@kernel.org> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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#
95d9ffbe |
|
18-Oct-2007 |
Rafael J. Wysocki <rjw@rjwysocki.net> |
PM: Move definition of struct pm_ops to suspend.h Move the definition of 'struct pm_ops' and related functions from <linux/pm.h> to <linux/suspend.h> . There are, at least, the following reasons to do that: * 'struct pm_ops' is specifically related to suspend and not to the power management in general. * As long as 'struct pm_ops' is defined in <linux/pm.h>, any modification of it causes the entire kernel to be recompiled, which is unnecessary and annoying. * Some suspend-related features are already defined in <linux/suspend.h>, so it is logical to move the definition of 'struct pm_ops' into there. * 'struct hibernation_ops', being the hibernation-related counterpart of 'struct pm_ops', is defined in <linux/suspend.h> . Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@ucw.cz> Cc: Len Brown <lenb@kernel.org> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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#
2391dae3 |
|
01-Jul-2007 |
Rafael J. Wysocki <rjw@rjwysocki.net> |
PM: introduce set_target method in pm_ops Commit 52ade9b3b97fd3bea42842a056fe0786c28d0555 changed the suspend code ordering to execute pm_ops->prepare() after the device model per-device .suspend() calls in order to fix some ACPI-related issues. Unfortunately, it broke the at91 platform which assumed that pm_ops->prepare() would be called before suspending devices. at91 used pm_ops->prepare() to get notified of the target system sleep state, so that it could use this information while suspending devices. However, with the current suspend code ordering pm_ops->prepare() is called too late for this purpose. Thus, at91 needs an additional method in 'struct pm_ops' that will be used for notifying the platform of the target system sleep state. Moreover, in the future such a method will also be needed by ACPI. This patch adds the .set_target() method to 'struct pm_ops' and makes the suspend code call it, if implemented, before executing the device model per-device .suspend() calls. It also modifies the at91 code to use pm_ops->set_target() instead of pm_ops->prepare(). Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: David Brownell <dbrownell@users.sourceforge.net> Cc: Pavel Machek <pavel@ucw.cz> Cc: Johannes Berg <johannes@sipsolutions.net> Cc: Len Brown <lenb@kernel.org> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
#
b6b27ae5 |
|
31-May-2007 |
Andrew Victor <andrew@sanpeople.com> |
[ARM] 4419/1: AT91: SAM9 USB clocks check for suspending When suspending to slow-clock mode, at91_pm_verify_clocks() is called to ensure that all the clocks are disabled or in the correct state. This patch replaces the "#warning TODO" messages for the SAM9 processors with the correct code. Signed-off-by: Andrew Victor <andrew@sanpeople.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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#
fe0c935a |
|
30-Apr-2007 |
Johannes Berg <johannes@sipsolutions.net> |
rework pm_ops pm_disk_mode, kill misuse This patch series cleans up some misconceptions about pm_ops. Some users of the pm_ops structure attempt to use it to stop the user from entering suspend to disk, this, however, is not possible since the user can always use "shutdown" in /sys/power/disk and then the pm_ops are never invoked. Also, platforms that don't support suspend to disk simply should not allow configuring SOFTWARE_SUSPEND (read the help text on it, it only selects suspend to disk and nothing else, all the other stuff depends on PM). The pm_ops structure is actually intended to provide a way to enter platform-defined sleep states (currently supported states are "standby" and "mem" (suspend to ram)) and additionally (if SOFTWARE_SUSPEND is configured) allows a platform to support a platform specific way to enter low-power mode once everything has been saved to disk. This is currently only used by ACPI (S4). This patch: The pm_ops.pm_disk_mode is used in totally bogus ways since nobody really seems to understand what it actually does. This patch clarifies the pm_disk_mode description. It also removes all the arm and sh users that think they can veto suspend to disk via pm_ops; not so since the user can always do echo shutdown > /sys/power/disk, they need to find a better way involving Kconfig or such. ACPI is the only user left with a non-zero pm_disk_mode. The patch also sets the default mode to shutdown again, but when a new pm_ops is registered its pm_disk_mode is selected as default, that way the default stays for ACPI where it is apparently required. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Cc: David Brownell <david-b@pacbell.net> Acked-by: Pavel Machek <pavel@ucw.cz> Cc: <linux-pm@lists.linux-foundation.org> Cc: Len Brown <lenb@kernel.org> Acked-by: Russell King <rmk@arm.linux.org.uk> Cc: Greg KH <greg@kroah.com> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Acked-by: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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b2c65616 |
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08-Feb-2007 |
Andrew Victor <andrew@sanpeople.com> |
[ARM] 4145/2: AT91: Add support for AT91SAM9263 processor Add support for the Atmel AT91SAM9263 processor. It is similar to the AT91SAM9260 but with more integrated peripherals, 5 GPIO banks, etc. Original patch from Nicolas Ferre. Signed-off-by: Andrew Victor <andrew@sanpeople.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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9d041268 |
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05-Feb-2007 |
Andrew Victor <andrew@sanpeople.com> |
[ARM] 4124/1: Rename mach-at91rm9200 and arch-at91rm9200 directories Now that Linux includes support for the Atmel AT91SAM9260 and AT91SAM9261 processors in addition to the original Atmel AT91RM9200 (with support for more AT91 processors pending), the "mach-at91rm9200" and "arch-at91rm9200" directories should be renamed to indicate their more generic nature. The following git commands should be run BEFORE applying this patch: git-mv arch/arm/mach-at91rm9200 arch/arm/mach-at91 git-mv include/asm-arm/arch-at91rm9200 include/asm-arm/arch-at91 Signed-off-by: Andrew Victor <andrew@sanpeople.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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