#
b0cde62e |
|
04-Jan-2024 |
Uwe Kleine-König <u.kleine-koenig@pengutronix.de> |
clk: Add a devm variant of clk_rate_exclusive_get() This allows to simplify drivers that use clk_rate_exclusive_get() in their probe routine as calling clk_rate_exclusive_put() is cared for automatically. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Link: https://lore.kernel.org/r/20240104225512.1124519-2-u.kleine-koenig@pengutronix.de Acked-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
|
#
265b07df |
|
20-Feb-2024 |
Shradha Todi <shradha.t@samsung.com> |
clk: Provide managed helper to get and enable bulk clocks Provide a managed devm_clk_bulk* wrapper to get and enable all bulk clocks in order to simplify drivers that keeps all clocks enabled for the time of driver operation. Suggested-by: Marek Szyprowski <m.szyprowski@samsung.com> Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Signed-off-by: Shradha Todi <shradha.t@samsung.com> Link: https://lore.kernel.org/r/20240220084046.23786-2-shradha.t@samsung.com Signed-off-by: Stephen Boyd <sboyd@kernel.org>
|
#
2746f13f |
|
25-Jul-2023 |
Biju Das <biju.das.jz@bp.renesas.com> |
clk: Fix undefined reference to `clk_rate_exclusive_{get,put}' The COMMON_CLK config is not enabled in some of the architectures. This causes below build issues: pwm-rz-mtu3.c:(.text+0x114): undefined reference to `clk_rate_exclusive_put' pwm-rz-mtu3.c:(.text+0x32c): undefined reference to `clk_rate_exclusive_get' Fix these issues by moving clk_rate_exclusive_{get,put} inside COMMON_CLK code block, as clk.c is enabled by COMMON_CLK. Fixes: 55e9b8b7b806 ("clk: add clk_rate_exclusive api") Reported-by: kernel test robot <lkp@intel.com> Closes: https://lore.kernel.org/all/202307251752.vLfmmhYm-lkp@intel.com/ Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com> Link: https://lore.kernel.org/r/20230725175140.361479-1-biju.das.jz@bp.renesas.com Signed-off-by: Stephen Boyd <sboyd@kernel.org>
|
#
22fb0e28 |
|
16-Aug-2022 |
Maxime Ripard <maxime@cerno.tech> |
clk: Constify clk_has_parent() clk_has_parent() doesn't modify the clocks being passed, so let's make it const. Suggested-by: Stephen Boyd <sboyd@kernel.org> Signed-off-by: Maxime Ripard <maxime@cerno.tech> Link: https://lore.kernel.org/r/20220816112530.1837489-21-maxime@cerno.tech Tested-by: Linux Kernel Functional Testing <lkft@linaro.org> Tested-by: Naresh Kamboju <naresh.kamboju@linaro.org> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
|
#
7ef9651e |
|
20-May-2022 |
Uwe Kleine-König <u.kleine-koenig@pengutronix.de> |
clk: Provide new devm_clk helpers for prepared and enabled clocks When a driver keeps a clock prepared (or enabled) during the whole lifetime of the driver, these helpers allow to simplify the drivers. Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Reviewed-by: Alexandru Ardelean <aardelean@deviqon.com> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Link: https://lore.kernel.org/r/20220520075737.758761-4-u.kleine-koenig@pengutronix.de Signed-off-by: Stephen Boyd <sboyd@kernel.org>
|
#
af89cd45 |
|
20-May-2022 |
Uwe Kleine-König <u.kleine-koenig@pengutronix.de> |
clk: Improve documentation for devm_clk_get() and its optional variant Make use of "Context:" and "Return:". Mention that the clk is not to be expected to be prepared, previously only not being enabled was mentioned which probably dates from the times when the concept of clk preparation wasn't invented yet. Also describe devm_clk_get_optional() fully instead of just referencing devm_clk_get(). Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Link: https://lore.kernel.org/r/20220520075737.758761-2-u.kleine-koenig@pengutronix.de Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
|
#
c9744843 |
|
25-Feb-2022 |
Maxime Ripard <maxime@cerno.tech> |
clk: Add clk_drop_range In order to reset the range on a clock, we need to call clk_set_rate_range with a minimum of 0 and a maximum of ULONG_MAX. Since it's fairly inconvenient, let's introduce a clk_drop_range() function that will do just this. Suggested-by: Stephen Boyd <sboyd@kernel.org> Signed-off-by: Maxime Ripard <maxime@cerno.tech> Link: https://lore.kernel.org/r/20220225143534.405820-8-maxime@cerno.tech Signed-off-by: Stephen Boyd <sboyd@kernel.org>
|
#
b90f3726 |
|
06-Jan-2021 |
Randy Dunlap <rdunlap@infradead.org> |
linux/clk.h: use correct kernel-doc notation for 2 functions Fix kernel-doc notation for 2 functions so that the generated html is correct. Currently it skips all text between the ':' and the '-', so "[un]register a clock rate" is missing. Fixes: 86bcfa2e87c4 ("clk: add pr_debug & kerneldoc around clk notifiers") Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: Mike Turquette <mturquette@linaro.org> Cc: Russell King <linux@armlinux.org.uk> Cc: linux-clk@vger.kernel.org Link: https://lore.kernel.org/r/20210107023304.24442-1-rdunlap@infradead.org Signed-off-by: Stephen Boyd <sboyd@kernel.org>
|
#
0bfa0820 |
|
25-Jan-2021 |
Nicolas Pitre <npitre@baylibre.com> |
PM: clk: make PM clock layer compatible with clocks that must sleep The clock API splits its interface into sleepable ant atomic contexts: - clk_prepare/clk_unprepare for stuff that might sleep - clk_enable_clk_disable for anything that may be done in atomic context The code handling runtime PM for clocks only calls clk_disable() on suspend requests, and clk_enable on resume requests. This means that runtime PM with clock providers that only have the prepare/unprepare methods implemented is basically useless. Many clock implementations can't accommodate atomic contexts. This is often the case when communication with the clock happens through another subsystem like I2C or SCMI. Let's make the clock PM code useful with such clocks by safely invoking clk_prepare/clk_unprepare upon resume/suspend requests. Of course, when such clocks are registered with the PM layer then pm_runtime_irq_safe() can't be used, and neither pm_runtime_suspend() nor pm_runtime_resume() may be invoked in atomic context. For clocks that do implement the enable and disable methods then everything just works as before. A note on sparse: According to https://lwn.net/Articles/109066/ there are things that sparse can't cope with. In particular, pm_clk_op_lock() and pm_clk_op_unlock() may or may not lock/unlock psd->lock depending on some runtime condition. To work around that we tell it the lock is always untaken for the purpose of static analisys. Thanks to Naresh Kamboju for reporting issues with the initial patch. Signed-off-by: Nicolas Pitre <npitre@baylibre.com> Tested-by: Naresh Kamboju <naresh.kamboju@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
|
#
e6fb7aee |
|
21-Oct-2020 |
Jerome Brunet <jbrunet@baylibre.com> |
clk: meson: g12: use devm variant to register notifiers Until now, nothing was done to unregister the dvfs clock notifiers of the Amlogic g12 SoC family. This is not great but this driver was not really expected to be unloaded. With the ongoing effort to build everything as module for this platform, this needs to be cleanly handled. Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> Link: https://lore.kernel.org/r/20201021163847.595189-3-jbrunet@baylibre.com Signed-off-by: Stephen Boyd <sboyd@kernel.org>
|
#
6d30d50d |
|
21-Oct-2020 |
Jerome Brunet <jbrunet@baylibre.com> |
clk: add devm variant of clk_notifier_register Add a memory managed variant of clk_notifier_register() to make life easier on clock consumers using notifiers Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> Link: https://lore.kernel.org/r/20201021163847.595189-2-jbrunet@baylibre.com Signed-off-by: Stephen Boyd <sboyd@kernel.org>
|
#
9d1c94a6 |
|
23-Oct-2020 |
Mauro Carvalho Chehab <mchehab+huawei@kernel.org> |
clk: fix a kernel-doc markup clk_get_duty_cycle -> clk_get_scaled_duty_cycle Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Link: https://lore.kernel.org/r/b2336f3f3cdfe6e1a2d3a7a056ab7ccc7a81b945.1603469755.git.mchehab+huawei@kernel.org Signed-off-by: Stephen Boyd <sboyd@kernel.org>
|
#
64c76b31 |
|
26-Dec-2019 |
Martin Blumenstingl <martin.blumenstingl@googlemail.com> |
clk: clarify that clk_set_rate() does updates from top to bottom clk_set_rate() currently starts updating the rate for a clock at the top-most affected clock and then walks down the tree to update the bottom-most affected clock last. This behavior is important for protected clocks where we can switch between multiple parents to achieve the same output. An example for this is the mali clock tree on Amlogic SoCs: mali_0_mux (must not change when enabled) mali_0_div (must not change when enabled) mali_0 (gate) mali_1_mux (must not change when enabled) mali_1_div (must not change when enabled) mali_1 (gate) The final output can either use mali_0_gate or mali_1. To change the final output we must switch to the "inactive" tree. Assuming mali_0 is active, then we need to prepare mali_1 with the new desired rate and finally switch the output to the mali_1 tree. This process will then protect the mali_1 tree and at the same time unprotect the mali_0 tree. The next call to clk_set_rate() will then switch from the mali_1 tree back to mali_0. Acked-by: Stephen Boyd <sboyd@kernel.org> Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
|
#
570aaec7 |
|
17-Jul-2019 |
Andrey Smirnov <andrew.smirnov@gmail.com> |
clk: Constify struct clk_bulk_data * where possible The following functions: - clk_bulk_enable() - clk_bulk_prepare() - clk_bulk_disable() - clk_bulk_unprepare() already expect const clk_bulk_data * as a second parameter, however their no-op version have mismatching prototypes that don't. Fix that. While at it, constify the second argument of clk_bulk_prepare_enable() and clk_bulk_disable_unprepare(), since the functions they are comprised of already accept const clk_bulk_data *. Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Cc: Russell King <linux@armlinux.org.uk> Cc: Stephen Boyd <sboyd@kernel.org> Cc: Chris Healy <cphealy@gmail.com> Cc: linux-clk@vger.kernel.org Cc: linux-kernel@vger.kernel.org Link: https://lkml.kernel.org/r/20190717145651.17250-1-andrew.smirnov@gmail.com Signed-off-by: Stephen Boyd <sboyd@kernel.org>
|
#
6ee82ef0 |
|
01-Jul-2019 |
Sylwester Nawrocki <s.nawrocki@samsung.com> |
clk: Add missing documentation of devm_clk_bulk_get_optional() argument Fix an incomplete devm_clk_bulk_get_optional() function documentation by adding description of the num_clks argument as in other *clk_bulk* functions. Fixes: 9bd5ef0bd874 ("clk: Add devm_clk_bulk_get_optional() function") Reported-by: kbuild test robot <lkp@intel.com> Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
|
#
9bd5ef0b |
|
19-Jun-2019 |
Sylwester Nawrocki <s.nawrocki@samsung.com> |
clk: Add devm_clk_bulk_get_optional() function Add managed version of the clk_bulk_get_optional() helper function. Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com> [sboyd@kernel.org: Mark __devm_clk_bulk_get() static] Signed-off-by: Stephen Boyd <sboyd@kernel.org>
|
#
2f25528e |
|
19-Jun-2019 |
Sylwester Nawrocki <s.nawrocki@samsung.com> |
clk: Add clk_bulk_get_optional() function clk_bulk_get_optional() allows to get a group of clocks where one or more is optional. For a not available clock, e.g. not specifed in the clock consumer node in DT, its respective struct clk pointer will be NULL. This allows for operating on a group of returned clocks (struct clk_bulk_data array) with existing clk_bulk* APIs. Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
|
#
d2912cb1 |
|
04-Jun-2019 |
Thomas Gleixner <tglx@linutronix.de> |
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 Based on 2 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 version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
#
b88c9f41 |
|
25-Apr-2019 |
Dmitry Osipenko <digetx@gmail.com> |
clk: Add missing stubs for a few functions Compilation fails if any of undeclared clk_set_*() functions are in use and CONFIG_HAVE_CLK=n. Reported-by: kbuild test robot <lkp@intel.com> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
|
#
60b8f0dd |
|
03-Dec-2018 |
Phil Edworthy <phil.edworthy@renesas.com> |
clk: Add (devm_)clk_get_optional() functions This adds clk_get_optional() and devm_clk_get_optional() functions to get optional clocks. They behave the same as (devm_)clk_get() except where there is no clock producer. In this case, instead of returning -ENOENT, the function returns NULL. This makes error checking simpler and allows clk_prepare_enable, etc to be called on the returned reference without additional checks. Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Russell King <linux@armlinux.org.uk> [sboyd@kernel.org: Document in devres.txt] Signed-off-by: Stephen Boyd <sboyd@kernel.org>
|
#
f08c2e28 |
|
30-Aug-2018 |
Dong Aisheng <aisheng.dong@nxp.com> |
clk: add managed version of clk_bulk_get_all This patch introduces the managed version of clk_bulk_get_all. Cc: Michael Turquette <mturquette@baylibre.com> Cc: Stephen Boyd <sboyd@codeaurora.org> Tested-by: Thor Thayer <thor.thayer@linux.intel.com> Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
|
#
616e45df |
|
30-Aug-2018 |
Dong Aisheng <aisheng.dong@nxp.com> |
clk: add new APIs to operate on all available clocks This patch introduces of_clk_bulk_get_all and clk_bulk_x_all APIs to users who just want to handle all available clocks from device tree without need to know the detailed clock information likes clock numbers and names. This is useful in writing some generic drivers to handle clock part. Cc: Stephen Boyd <sboyd@codeaurora.org> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Tested-by: Thor Thayer <thor.thayer@linux.intel.com> Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
|
#
8b95d1ce |
|
03-Sep-2018 |
Russ Dill <Russ.Dill@ti.com> |
clk: Add functions to save/restore clock context en-masse Deep enough power saving mode can result into losing context of the clock registers also, and they need to be restored once coming back from the power saving mode. Hence add functions to save/restore clock context. Signed-off-by: Keerthy <j-keerthy@ti.com> Signed-off-by: Russ Dill <Russ.Dill@ti.com> Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Tero Kristo <t-kristo@ti.com>
|
#
9fba738a |
|
19-Jun-2018 |
Jerome Brunet <jbrunet@baylibre.com> |
clk: add duty cycle support Add the possibility to apply and query the clock signal duty cycle ratio. This is useful when the duty cycle of the clock signal depends on some other parameters controlled by the clock framework. For example, the duty cycle of a divider may depends on the raw divider setting (ratio = N / div) , which is controlled by the CCF. In such case, going through the pwm framework to control the duty cycle ratio of this clock would be a burden. A clock provider is not required to implement the operation to set and get the duty cycle. If it does not implement .get_duty_cycle(), the ratio is assumed to be 50%. This change also adds a new flag, CLK_DUTY_CYCLE_PARENT. This flag should be used to indicate that a clock, such as gates and muxes, may inherit the duty cycle ratio of its parent clock. If a clock does not provide a get_duty_cycle() callback and has CLK_DUTY_CYCLE_PARENT, then the call will be directly forwarded to its parent clock, if any. For set_duty_cycle(), the clock should also have CLK_SET_RATE_PARENT for the call to be forwarded Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> Signed-off-by: Michael Turquette <mturquette@baylibre.com> Link: lkml.kernel.org/r/20180619144141.8506-1-jbrunet@baylibre.com
|
#
6e0d4ff4 |
|
23-Jan-2018 |
Dong Aisheng <aisheng.dong@nxp.com> |
clk: add more __must_check for bulk APIs we need it even when !CONFIG_HAVE_CLK because it allows us to catch missing checking return values in the non-clk compile configurations too. More test coverage. Cc: Stephen Boyd <sboyd@codeaurora.org> Suggested-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
|
#
55e9b8b7 |
|
01-Dec-2017 |
Jerome Brunet <jbrunet@baylibre.com> |
clk: add clk_rate_exclusive api Using clock rate protection, we can now provide a way for clock consumer to claim exclusive control over the rate of a producer So far, rate change operations have been a "last write wins" affair. This changes allows drivers to explicitly protect against this behavior, if required. Of course, if exclusivity over a producer is claimed more than once, the rate is effectively locked as exclusivity cannot be preempted Tested-by: Maxime Ripard <maxime.ripard@free-electrons.com> Acked-by: Michael Turquette <mturquette@baylibre.com> Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> Signed-off-by: Michael Turquette <mturquette@baylibre.com> Link: lkml.kernel.org/r/20171201215200.23523-10-jbrunet@baylibre.com
|
#
3c48d86c |
|
12-Jul-2017 |
Bjorn Andersson <bjorn.andersson@linaro.org> |
clk: Provide bulk prepare_enable disable_unprepare variants This extends the existing set of bulk helpers with prepare_enable and disable_unprepare variants. Cc: Russell King <linux@armlinux.org.uk>, Cc: Dong Aisheng <aisheng.dong@nxp.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
|
#
618aee02 |
|
19-May-2017 |
Dong Aisheng <aisheng.dong@nxp.com> |
clk: add managed version of clk_bulk_get This patch introduces the managed version of clk_bulk_get. Cc: Michael Turquette <mturquette@baylibre.com> Cc: Stephen Boyd <sboyd@codeaurora.org> Cc: Russell King <linux@arm.linux.org.uk> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Cc: Viresh Kumar <viresh.kumar@linaro.org> Cc: Mark Brown <broonie@kernel.org> Cc: Shawn Guo <shawnguo@kernel.org> Cc: Fabio Estevam <fabio.estevam@nxp.com> Cc: Sascha Hauer <kernel@pengutronix.de> Cc: Anson Huang <anson.huang@nxp.com> Cc: Robin Gong <yibin.gong@nxp.com> Cc: Bai Ping <ping.bai@nxp.com> Cc: Leonard Crestez <leonard.crestez@nxp.com> Cc: Octavian Purdila <octavian.purdila@nxp.com> Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
|
#
266e4e9d |
|
19-May-2017 |
Dong Aisheng <aisheng.dong@nxp.com> |
clk: add clk_bulk_get accessories These helper function allows drivers to get several clk consumers in one operation. If any of the clk cannot be acquired then any clks that were got will be put before returning to the caller. This can relieve the driver owners' life who needs to handle many clocks, as well as each clock error reporting. Cc: Michael Turquette <mturquette@baylibre.com> Cc: Stephen Boyd <sboyd@codeaurora.org> Cc: Russell King <linux@arm.linux.org.uk> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Cc: Viresh Kumar <viresh.kumar@linaro.org> Cc: Mark Brown <broonie@kernel.org> Cc: Shawn Guo <shawnguo@kernel.org> Cc: Fabio Estevam <fabio.estevam@nxp.com> Cc: Sascha Hauer <kernel@pengutronix.de> Cc: Anson Huang <anson.huang@nxp.com> Cc: Robin Gong <yibin.gong@nxp.com> Cc: Bai Ping <ping.bai@nxp.com> Cc: Leonard Crestez <leonard.crestez@nxp.com> Cc: Octavian Purdila <octavian.purdila@nxp.com> Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
|
#
428c9de5 |
|
28-Apr-2017 |
Geert Uytterhoeven <geert+renesas@glider.be> |
clk: Provide dummy of_clk_get_from_provider() for compile-testing When CONFIG_ON=n, dummies are provided for of_clk_get() and of_clk_get_by_name(), but not for of_clk_get_from_provider(). Provide a dummy for the latter, to improve the ability to do compile-testing. This requires removing the existing dummy in the Lantiq clock code. Fixes: 766e6a4ec602d0c1 ("clk: add DT clock binding support") Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Acked-by: Thomas Langer <thomas.langer@intel.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
|
#
0e056eb5 |
|
30-Mar-2017 |
Mauro Carvalho Chehab <mchehab@kernel.org> |
kernel-api.rst: fix a series of errors when parsing C files ./lib/string.c:134: WARNING: Inline emphasis start-string without end-string. ./mm/filemap.c:522: WARNING: Inline interpreted text or phrase reference start-string without end-string. ./mm/filemap.c:1283: ERROR: Unexpected indentation. ./mm/filemap.c:3003: WARNING: Inline interpreted text or phrase reference start-string without end-string. ./mm/vmalloc.c:1544: WARNING: Inline emphasis start-string without end-string. ./mm/page_alloc.c:4245: ERROR: Unexpected indentation. ./ipc/util.c:676: ERROR: Unexpected indentation. ./drivers/pci/irq.c:35: WARNING: Block quote ends without a blank line; unexpected unindent. ./security/security.c:109: ERROR: Unexpected indentation. ./security/security.c:110: WARNING: Definition list ends without a blank line; unexpected unindent. ./block/genhd.c:275: WARNING: Inline strong start-string without end-string. ./block/genhd.c:283: WARNING: Inline strong start-string without end-string. ./include/linux/clk.h:134: WARNING: Inline emphasis start-string without end-string. ./include/linux/clk.h:134: WARNING: Inline emphasis start-string without end-string. ./ipc/util.c:477: ERROR: Unknown target name: "s". Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
|
#
71a2f115 |
|
04-Dec-2016 |
Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> |
clk: add devm_get_clk_from_child() API Some driver is using this type of DT bindings for clock (more detail, see ${LINUX}/Documentation/devicetree/bindings/sound/simple-card.txt). sound_soc { ... cpu { clocks = <&xxx>; ... }; codec { clocks = <&xxx>; ... }; }; Current driver in this case uses of_clk_get() for each node, but there is no devm_of_clk_get() today. OTOH, the problem of having devm_of_clk_get() is that it encourages the use of of_clk_get() when clk_get() is more desirable. Thus, this patch adds new devm_get_clk_from_chile() which explicitly reads as get a clock from a child node of this device. By this function, we can also use this type of DT bindings sound_soc { clocks = <&xxx>, <&xxx>; clock-names = "cpu", "codec"; clock-ranges; ... cpu { ... }; codec { ... }; }; Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> [sboyd@codeurora.org: Rename subject to clk + add API] Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
|
#
e81b87d2 |
|
28-Jun-2016 |
Krzysztof Kozlowski <krzk@kernel.org> |
clk: Provide notifier stubs when !COMMON_CLK The clk notifier symbols are hidden by COMMON_CLK. However on some platforms HAVE_CLK might be set while COMMON_CLK not which leads to compile test build errors like: $ make.cross ARCH=sh drivers/devfreq/tegra-devfreq.c: In function 'tegra_actmon_rate_notify_cb': >> drivers/devfreq/tegra-devfreq.c:391:16: error: 'POST_RATE_CHANGE' undeclared (first use in this function) if (action != POST_RATE_CHANGE) ^ drivers/devfreq/tegra-devfreq.c: In function 'tegra_devfreq_probe': >> drivers/devfreq/tegra-devfreq.c:654:8: error: implicit declaration of function 'clk_notifier_register' [-Werror=implicit-function-declaration] err = clk_notifier_register(tegra->emc_clock, &tegra->rate_change_nb); ^ Export the macros and data type declarations outside of COMMON_CLK ifdef and provide stubs to fix the compile testing. Reported-by: kbuild test robot <lkp@intel.com> Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Tested-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
|
#
b81ea968 |
|
02-Jun-2016 |
Daniel Lezcano <daniel.lezcano@linaro.org> |
clk: Add missing clk_get_sys() stub When compiling with the COMPILE_TEST option set, the clps711x does not compile because of the clk_get_sys() noop stub missing. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Reviewed-by: Michael Turquette <mturquette@baylibre.com>
|
#
2d34e507 |
|
09-Mar-2015 |
Russell King <rmk+kernel@arm.linux.org.uk> |
clkdev: get rid of redundant clk_add_alias() prototype in linux/clk.h clk_add_alias() is provided by clkdev, and is not part of the clk API. Howver, it is prototyped in two locations: linux/clkdev.h and linux/clk.h. This is a mess. Get rid of the redundant and unnecessary version in linux/clk.h. Acked-by: Tony Lindgren <tony@atomide.com> Tested-by: Robert Jarzmik <robert.jarzmik@free.fr> Acked-by: Sekhar Nori <nsekhar@ti.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
|
#
d2d14a77 |
|
14-Mar-2015 |
Russell King <rmk+kernel@arm.linux.org.uk> |
clk: update clk API documentation to clarify clk_round_rate() The idea is that rate = clk_round_rate(clk, r) is equivalent to: clk_set_rate(clk, r); rate = clk_get_rate(clk); except that clk_round_rate() does not change the hardware in any way. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
|
#
3d3801ef |
|
25-Feb-2015 |
Michael Turquette <mturquette@linaro.org> |
clk: introduce clk_is_match Some drivers compare struct clk pointers as a means of knowing if the two pointers reference the same clock hardware. This behavior is dubious (drivers must not dereference struct clk), but did not cause any regressions until the per-user struct clk patch was merged. Now the test for matching clk's will always fail with per-user struct clk's. clk_is_match is introduced to fix the regression and prevent drivers from comparing the pointers manually. Fixes: 035a61c314eb ("clk: Make clk API return per-user struct clk instances") Cc: Russell King <linux@arm.linux.org.uk> Cc: Shawn Guo <shawn.guo@linaro.org> Cc: Tomeu Vizoso <tomeu.vizoso@collabora.com> Signed-off-by: Michael Turquette <mturquette@linaro.org> [arnd@arndb.de: Fix COMMON_CLK=N && HAS_CLK=Y config] Signed-off-by: Arnd Bergmann <arnd@arndb.de> [sboyd@codeaurora.org: const arguments to clk_is_match() and remove unnecessary ternary operation] Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
|
#
1c8e6004 |
|
22-Jan-2015 |
Tomeu Vizoso <tomeu.vizoso@collabora.com> |
clk: Add rate constraints to clocks Adds a way for clock consumers to set maximum and minimum rates. This can be used for thermal drivers to set minimum rates, or by misc. drivers to set maximum rates to assure a minimum performance level. Changes the signature of the determine_rate callback by adding the parameters min_rate and max_rate. Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> [sboyd@codeaurora.org: set req_rate in __clk_init] Signed-off-by: Michael Turquette <mturquette@linaro.org> [mturquette@linaro.org: min/max rate for sun6i_ahb1_clk_determine_rate migrated clk-private.h changes to clk.c]
|
#
4e88f3de |
|
21-Jan-2015 |
Thierry Reding <treding@nvidia.com> |
clk: Introduce clk_has_parent() This new function is similar to clk_set_parent(), except that it doesn't actually change the parent. It merely checks that the given parent clock can be a parent for the given clock. A situation where this is useful is to check that a particular setup is valid before switching to it. One specific use-case for this is atomic modesetting in the DRM framework where setting a mode is divided into a check phase where a given configuration is validated before applying changes to the hardware. Cc: Russell King <linux@arm.linux.org.uk> Signed-off-by: Thierry Reding <treding@nvidia.com> Reviewed-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Michael Turquette <mturquette@linaro.org>
|
#
e59c5371 |
|
18-Feb-2014 |
Mike Turquette <mturquette@linaro.org> |
clk: introduce clk_set_phase function & callback A common operation for a clock signal generator is to shift the phase of that signal. This patch introduces a new function to the clk.h API to dynamically adjust the phase of a clock signal. Additionally this patch introduces support for the new function in the common clock framework via the .set_phase call back in struct clk_ops. Signed-off-by: Mike Turquette <mturquette@linaro.org> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Reviewed-by: Heiko Stuebner <heiko@sntech.de> Acked-by: Hans de Goede <hdegoede@redhat.com>
|
#
da3dae54 |
|
08-Sep-2014 |
Masanari Iida <standby24x7@gmail.com> |
Documentation: Docbook: Fix generated DocBook/kernel-api.xml This patch fix spelling typo found in DocBook/kernel-api.xml. It is because the file is generated from the source comments, I have to fix the comments in source codes. Signed-off-by: Masanari Iida <standby24x7@gmail.com> Acked-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
|
#
86bcfa2e |
|
24-Feb-2014 |
Mike Turquette <mturquette@linaro.org> |
clk: add pr_debug & kerneldoc around clk notifiers Both the pr_err and the additional kerneldoc aim to help when debugging errors thrown from within a clock rate-change notifier callback. Reported-by: Sören Brinkmann <soren.brinkmann@xilinx.com> Acked-by: Sören Brinkmann <soren.brinkmann@xilinx.com> Signed-off-by: Mike Turquette <mturquette@linaro.org>
|
#
5279fc40 |
|
21-Dec-2013 |
Boris Brezillon <bbrezillon@kernel.org> |
clk: add clk accuracy retrieval support The clock accuracy is expressed in ppb (parts per billion) and represents the possible clock drift. Say you have a clock (e.g. an oscillator) which provides a fixed clock of 20MHz with an accuracy of +- 20Hz. This accuracy expressed in ppb is 20Hz/20MHz = 1000 ppb (or 1 ppm). Clock users may need the clock accuracy information in order to choose the best clock (the one with the best accuracy) across several available clocks. This patch adds clk accuracy retrieval support for common clk framework by means of a new function called clk_get_accuracy. This function returns the given clock accuracy expressed in ppb. In order to get the clock accuracy, this implementation adds one callback called recalc_accuracy to the clk_ops structure. This callback is given the parent clock accuracy (if the clock is not a root clock) and should recalculate the given clock accuracy. This callback is optional and may be implemented if the clock is not a perfect clock (accuracy != 0 ppb). Signed-off-by: Boris BREZILLON <b.brezillon@overkiz.com> Signed-off-by: Mike Turquette <mturquette@linaro.org>
|
#
fb72a059 |
|
03-Apr-2013 |
Soren Brinkmann <soren.brinkmann@xilinx.com> |
clk: Properly handle notifier return values Notifiers may return NOTIFY_(OK|DONE|STOP|BAD). The CCF uses an inconsistent mix of checking against NOTIFY_STOP or NOTIFY_BAD. This inconsistency leaves errors undetected in some cases: clk_set_parent() calls __clk_speculate_rates(), which stops when it hits a NOTIFIER_BAD (STOP is ignored), and passes this value back to the caller. clk_set_parent() compares this return value against NOTIFY_STOP only, ignoring NOTIFY_BAD returns. Use NOTIFY_STOP_MASK to detect a negative notifier return value and document all four return value options. Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com> Signed-off-by: Mike Turquette <mturquette@linaro.org>
|
#
93abe8e4 |
|
30-Jul-2012 |
Viresh Kumar <vireshk@kernel.org> |
clk: add non CONFIG_HAVE_CLK routines Many drivers are shared between architectures that may or may not have HAVE_CLK selected for them. To remove compilation errors for them we enclose clk_*() calls in these drivers within #ifdef CONFIG_HAVE_CLK, #endif. This patch removes the need of these CONFIG_HAVE_CLK statements, by introducing dummy routines when HAVE_CLK is not selected by platforms. So, definition of these routines will always be available. These calls will return error for platforms that don't select HAVE_CLK. Signed-off-by: Viresh Kumar <viresh.kumar@st.com> Cc: Wolfram Sang <w.sang@pengutronix.de> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Jeff Garzik <jgarzik@redhat.com> Cc: Andrew Lunn <andrew@lunn.ch> Cc: Bhupesh Sharma <bhupesh.sharma@st.com> Cc: Giuseppe Cavallaro <peppe.cavallaro@st.com> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Mike Turquette <mturquette@linaro.org> Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com> Cc: viresh kumar <viresh.linux@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
#
a58b3a4a |
|
23-Jul-2012 |
Jan-Simon Möller <jansimon.moeller@gmx.de> |
Fix typo in include/linux/clk.h . Signed-off-by: Jan-Simon Möller <jansimon.moeller@gmx.de> Cc: Russell King <linux@arm.linux.org.uk> Cc: linux-kernel@vger.kernel.org Signed-off-by: Jiri Kosina <jkosina@suse.cz>
|
#
137f8a72 |
|
17-Jul-2012 |
Rob Herring <rob.herring@calxeda.com> |
clk: fix compile for OF && !COMMON_CLK With commit 766e6a4ec602d0c107 (clk: add DT clock binding support), compiling with OF && !COMMON_CLK is broken. Reported-by: Alexandre Pereira da Silva <aletes.xgr@gmail.com> Reported-by: Prashant Gaikwad <pgaikwad@nvidia.com> Signed-off-by: Rob Herring <rob.herring@calxeda.com> Signed-off-by: Mike Turquette <mturquette@linaro.org>
|
#
9f1612d3 |
|
17-Jul-2012 |
Shawn Guo <shawn.guo@linaro.org> |
clk: fix clk_get on of_clk_get_by_name return check The commit 766e6a4 (clk: add DT clock binding support) plugs device tree clk lookup of_clk_get_by_name into clk_get, and fall on non-DT lookup clk_get_sys if DT lookup fails. The return check on of_clk_get_by_name takes (clk != NULL) as a successful DT lookup. But it's not the case. For any system that does not define clk lookup in device tree, ERR_PTR(-ENOENT) will be returned, and consequently, all the client drivers calling clk_get in their probe functions will fail to probe with error code -ENOENT returned. Fix the issue by checking of_clk_get_by_name return with !IS_ERR(clk), and update of_clk_get and of_clk_get_by_name for !CONFIG_OF build correspondingly. Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Acked-by: Rob Herring <rob.herring@calxeda.com> Tested-by: Marek Vasut <marex@denx.de> Tested-by: Lauri Hintsala <lauri.hintsala@bluegiga.com> Signed-off-by: Mike Turquette <mturquette@linaro.org>
|
#
766e6a4e |
|
09-Apr-2012 |
Grant Likely <grant.likely@secretlab.ca> |
clk: add DT clock binding support Based on work 1st by Ben Herrenschmidt and Jeremy Kerr, then by Grant Likely, this patch adds support to clk_get to allow drivers to retrieve clock data from the device tree. Platforms scan for clocks in DT with of_clk_init and a match table, and the register a provider through of_clk_add_provider. The provider's clk_src_get function will be called when a device references the provider's OF node for a clock reference. v6 (Rob Herring): - Return error values instead of NULL to match clock framework expectations v5 (Rob Herring): - Move from drivers/of into common clock subsystem - Squashed "dt/clock: add a simple provider get function" and "dt/clock: add function to get parent clock name" - Rebase to 3.4-rc1 - Drop CONFIG_OF_CLOCK and just use CONFIG_OF - Add missing EXPORT_SYMBOL to various functions - s/clock-output-name/clock-output-names/ - Define that fixed-clock binding is a single output v4 (Rob Herring): - Rework for common clk subsystem - Add of_clk_get_parent_name function v3: - Clarified documentation v2: - fixed errant ';' causing compile error - Editorial fixes from Shawn Guo - merged in adding lookup to clkdev - changed property names to match established convention. After working with the binding a bit it really made more sense to follow the lead of 'reg', 'gpios' and 'interrupts' by making the input simply 'clocks' & 'clock-names' instead of 'clock-input-*', and to only use clock-output* for the producer nodes. (Sorry Shawn, this will mean you need to change some code, but it should be trivial) - Add ability to inherit clocks from parent nodes by using an empty 'clock-ranges' property. Useful for busses. I could use some feedback on the new property name, 'clock-ranges' doesn't feel right to me. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Rob Herring <rob.herring@calxeda.com> Reviewed-by: Shawn Guo <shawn.guo@freescale.com> Cc: Sascha Hauer <kernel@pengutronix.de> Signed-off-by: Mike Turquette <mturquette@linaro.org>
|
#
8b7730dd |
|
09-Apr-2012 |
Rob Herring <rob.herring@calxeda.com> |
clk: remove trailing whitespace from clk.h Remove trailing whitespace from 2 lines. Signed-off-by: Rob Herring <rob.herring@calxeda.com>
|
#
7e87aed9 |
|
01-Apr-2012 |
Mark Brown <broonie@opensource.wolfsonmicro.com> |
clk: Remove comment for end of CONFIG_COMMON_CLK section The comment is inaccurate (it actually ends the CONFIG_COMMON_CLK section, there's no else) and given that we've just got a single level of ifdef isn't really needed anyway. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Mike Turquette <mturquette@linaro.org>
|
#
a8a97db9 |
|
05-Apr-2012 |
Mark Brown <broonie@sirena.org.uk> |
ARM: 7376/1: clkdev: Implement managed clk_get() Allow clk API users to simplify their cleanup paths by providing a managed version of clk_get() and clk_put(). Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
|
#
b2476490 |
|
16-Mar-2012 |
Mike Turquette <mturquette@linaro.org> |
clk: introduce the common clock framework The common clock framework defines a common struct clk useful across most platforms as well as an implementation of the clk api that drivers can use safely for managing clocks. The net result is consolidation of many different struct clk definitions and platform-specific clock framework implementations. This patch introduces the common struct clk, struct clk_ops and an implementation of the well-known clock api in include/clk/clk.h. Platforms may define their own hardware-specific clock structure and their own clock operation callbacks, so long as it wraps an instance of struct clk_hw. See Documentation/clk.txt for more details. This patch is based on the work of Jeremy Kerr, which in turn was based on the work of Ben Herrenschmidt. Signed-off-by: Mike Turquette <mturquette@linaro.org> Signed-off-by: Mike Turquette <mturquette@ti.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Andrew Lunn <andrew@lunn.ch> Reviewed-by: Rob Herring <rob.herring <at> calxeda.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: Jeremy Kerr <jeremy.kerr@canonical.com> Cc: Arnd Bergman <arnd.bergmann@linaro.org> Cc: Paul Walmsley <paul@pwsan.com> Cc: Shawn Guo <shawn.guo@freescale.com> Cc: Sascha Hauer <s.hauer@pengutronix.de> Cc: Richard Zhao <richard.zhao@linaro.org> Cc: Saravana Kannan <skannan@codeaurora.org> Cc: Magnus Damm <magnus.damm@gmail.com> Cc: Mark Brown <broonie@opensource.wolfsonmicro.com> Cc: Linus Walleij <linus.walleij@stericsson.com> Cc: Stephen Boyd <sboyd@codeaurora.org> Cc: Amit Kucheria <amit.kucheria@linaro.org> Cc: Deepak Saxena <dsaxena@linaro.org> Cc: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
|
#
42c5d52f |
|
14-Nov-2011 |
Richard Zhao <richard.zhao@linaro.org> |
clk: add helper functions clk_prepare_enable and clk_disable_unprepare It's for migrating to generic clk framework API. The helper functions help cases clk_enable/clk_disable is used in non-atomic context. For example, Call clk_enable in probe and clk_disable in remove. Signed-off-by: Richard Zhao <richard.zhao@linaro.org> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Cc: Russell King <linux@arm.linux.org.uk> Acked-by: Marek Vasut <marek.vasut@gmail.com>
|
#
40d3e0f4 |
|
22-Sep-2011 |
Russell King <rmk+kernel@arm.linux.org.uk> |
clk: provide prepare/unprepare functions As discussed previously, there's the need on some platforms to run some parts of clk_enable() in contexts which can schedule. The solution which was agreed upon was to provide clk_prepare() and clk_unprepare() to contain this parts, while clk_enable() and clk_disable() perform the atomic part. This patch provides a common definition for clk_prepare() and clk_unprepare() in linux/clk.h, and provides an upgrade path for existing implementation and drivers: drivers can start using clk_prepare() and clk_unprepare() once this patch is merged without having to wait for platform support. Platforms can then start to provide these additional functions. Eventually, HAVE_CLK_PREPARE will be removed from the kernel, and everyone will have to provide these new APIs. Acked-by: Saravana Kannan <skannan@codeaurora.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
|
#
c0683039 |
|
03-Jun-2009 |
Tony Lindgren <tony@atomide.com> |
[ARM] 5536/1: Move clk_add_alias() to arch/arm/common/clkdev.c This can be used for other arm platforms too as discussed on the linux-arm-kernel list. Also check the return value with IS_ERR and return PTR_ERR as suggested by Russell King. Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
|
#
05fd8e73 |
|
06-Mar-2009 |
Sascha Hauer <s.hauer@pengutronix.de> |
clkdev: add possibility to get a clock based on the device name This adds clk_get_sys to get a clock without the associated struct device. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
|
#
f7ad160b |
|
15-Oct-2008 |
Alex Raimondi <raimondi@miromico.ch> |
include/linux/clk.h: fix comment clk_get and clk_put may not be used from within interrupt context. Change comment to this function. Signed-off-by: Alex Raimondi <raimondi@miromico.ch> Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Cc: john stultz <johnstul@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
#
686f8c5d |
|
25-Mar-2006 |
Todd Poynor <tpoynor@mvista.com> |
include/linux/clk.h is betraying its ARM origins include/linux/clk.h is betraying its ARM origins. Signed-off-by: Todd Poynor <tpoynor@mvista.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
|
#
f8ce2547 |
|
07-Jan-2006 |
Russell King <rmk@dyn-67.arm.linux.org.uk> |
[ARM] Move asm/hardware/clock.h to linux/clk.h This is needs to be visible to other architectures using the AMBA bus and peripherals. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
|