ARM: davinci: fix davinci_cpufreq_init() declaration

The davinci_cpufreq_init() declaration is only seen by its caller
but not the definition:

drivers/cpufreq/davinci-cpufreq.c:153:12: error: no previous prototype for 'davinci_cpufreq_init'

Move it into the platform_data header that is already used an
interface between the two places.

Acked-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Link: https://lore.kernel.org/r/20230516153109.514251-2-arnd@kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_56.RULE (part 1)

Based on the normalized pattern:

this file is licensed under the terms of the gnu general public
license version 2 this program is licensed as is without any warranty
of any kind whether express or implied

extracted by the scancode license scanner the SPDX license identifier

GPL-2.0-only

has been chosen to replace the boilerplate/reference.

Reviewed-by: Allison Randal <allison@lohutok.net>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

ARM: davinci: remove include/mach/ subdirectory

The files in include/mach are only used from mach/davinci,
so they are no longer needed in the traditional location.

Move them to arch/arm/mach-davinci/ and drop the logic for
the special include path.

The mach/uncompress.h file is not used at all and can just
be removed.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

ARM: davinci: pull davinci_intc_base into the respective intc drivers

davinci_intc_base is defined globally in common.c. Define separate
local variables for the aintc and cp-intc drivers and remove the
global one.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: David Lechner <david@lechnology.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

ARM: davinci: remove davinci_intc_type

We now use the generic ARM irq handler on davinci. There are no more
users that check davinci_intc_type. Remove the variable and all its
references.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: David Lechner <david@lechnology.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

ARM: davinci: remove dead code related to MAC address reading

There are no more users of davinci_get_mac_addr(). Remove it.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

ARM: davinci: remove legacy clocks

This removes the unused legacy clock code from arch/arm/mach-davinci/.

Signed-off-by: David Lechner <david@lechnology.com>
Reviewed-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

ARM: davinci: remove CONFIG_DAVINCI_RESET_CLOCKS

The common clock framework will take care of disabling unused clocks when
we switch from the legacy davinci clocks and having this enabled will
cause compile errors after we switch, so remove it now.

Signed-off-by: David Lechner <david@lechnology.com>
Reviewed-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

ARM: davinci: make argument to davinci_common_init() as const

Make the function argument of the function davinci_common_init
as const as it's memory contents are only copied during a
memcpy call. So, the fields of the structure to which the argument
soc_info points to never gets modified and therefore the argument can
be made const.
Add const to the prototype too.

Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

ARM: davinci: PM: rework init, remove platform device

Remove fake platform device used for PM init. Move pdata values which
are common across all current platforms into pm.c.

Also, since PM is only used on da8xx, remove davinci_pm_init() from
common init code, and only use in da850/omapl138 board files that are
currently creating the fake platform_device.

Suggested-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
[nsekhar@ti.com: subject line adjustment]
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

ARM: davinci: only use NVMEM when available

The davinci platform contains code that calls into the nvmem
subsystem, but that might be a loadable module, causing a
link error:

arch/arm/mach-davinci/built-in.o: In function `davinci_get_mac_addr':
:(.text+0x1088): undefined reference to `nvmem_device_read'
arch/arm/mach-davinci/built-in.o: In function `read_factory_config':
:(.text+0x214c): undefined reference to `nvmem_device_read'

Also, when NVMEM is completely disabled, the functions fail with
nonobvious error messages.

This ensures we only call the API functions when the code is actually
reachable from the board file, and otherwise prints a unique log
message.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: bec3c11bad0e ("misc: at24: replace memory_accessor with nvmem_device_read")
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>

ARM: davinci: Move clock init after ioremap.

Some clocks (such as the USB PHY clocks in DA8xx) will need to use iomem.
The davinci_common_init() function must be called before the ioremap, so
the clock init is now split out as separate function.

Signed-off-by: David Lechner <david@lechnology.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

misc: at24: replace memory_accessor with nvmem_device_read

Now that the AT24 uses the NVMEM framework, replace the
memory_accessor in the setup() callback with nvmem API calls.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Tested-by: Sekhar Nori <nsekhar@ti.com>
Acked-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

ARM: davinci: remove obsoleted init_consistent_dma_size()

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
CC: Sekhar Nori <nsekhar@ti.com>
CC: Kevin Hilman <khilman@ti.com>

ARM: davinci: use machine specific hook for late init

Cc: Kevin Hilman <khilman@ti.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Sekhar Nori <nsekhar@ti.com>

ARM: 7190/1: restart: davinci: use new restart hook

Rather than using DaVinci specific davinci_soc_info based
restart hook, use the restart hook available in the machine
descriptor instead.

Tested on DM365 and AM18x EVMs.

v2:
Changed to use restart hook in machine descriptor
per Russell's comment.

Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

ARM: mach-davinci: Setup consistent dma size at boot time

Signed-off-by: Jon Medhurst <tixy@yxit.co.uk>
CC: Sekhar Nori <nsekhar@ti.com>
CC: Kevin Hilman <khilman@ti.com>

Davinci: aintc/cpintc - use ioremap()

This patch implements the following:

- interrupt initialization uses ioremap() instead of passing a virtual address
via davinci_soc_info.

- machine definitions directly point to cp_intc_init() or davinci_irq_init()

- davinci_intc_type and davinci_intc_base now get initialized in controller
specific init functions instead of davinci_common_init()

- minor fix in davinci_irq_init() to use intc_irq_num instead of
DAVINCI_N_AINTC_IRQ

Signed-off-by: Cyril Chemparathy <cyril@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

Davinci: jtag_id - use ioremap()

This patch replaces the jtag id base info in davinci_soc_info with a physical
address which is then ioremap()ed within common code.

This patch (in combination with a similar change for PSC) will allow us to
eliminate the SYSCFG nastiness in DA8xx code.

Signed-off-by: Cyril Chemparathy <cyril@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

Davinci: watchdog reset separation across socs

The earlier watchdog reset mechanism had a couple of limitations. First, it
embedded a reference to "davinci_wdt_device" inside common code. This
forced all derived platforms (da8xx and tnetv107x) to define such a device.
This also would have caused problems in including multiple socs in a single
build due to symbol redefinition.

With this patch, davinci_watchdog_reset() now takes the platform device as an
argument. The davinci_soc_info struct has been extended to include a reset
function and a watchdog platform_device. arch_reset() then uses these
elements to reset the system in a SoC specific fashion.

Signed-off-by: Cyril Chemparathy <cyril@ti.com>
Tested-by: Sandeep Paulraj <s-paulraj@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

TI Davinci EMAC : Re-use driver for other platforms.

The davinci EMAC peripheral is also available on other TI
platforms -notably TI AM3517 SoC. This patch modifies the
config option and the platform structure header files so that
the driver can be reused on non-davinci platforms as well.

Signed-off-by: Sriramakrishnan <srk@ti.com>
Acked-by: Chaithrika U S <chaithrika@ti.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

davinci: make it easier to identify SoC init failures

This patch makes it easier to identify SoC init failures
by panicing when SoC init fails. Without successful SoC
init, the kernel eventually fails when attempt is made to
access the clocks.

Also, an error is printed when JTAG ID match fails to make
it easier to identify failures due to SoC rev changes.

Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

davinci: Integrate cp_intc support into low-level irq code

Integrate the Common Platform Interrupt Controller (cp_intc)
support into the low-level irq handling for davinci and similar
platforms. Do it such that support for cp_intc and the original
aintc can coexist in the same kernel binary.

Signed-off-by: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

davinci: Factor out emac mac address handling

Factor out the code to extract that mac address from
i2c eeprom.

Signed-off-by: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

davinci: Move interrupt ctlr info to SoC infrastructure

Use the SoC infrastructure to hold the interrupt controller
information (i.e., base address, default priorities,
interrupt controller type, and the number of IRQs).

The interrupt controller base, although initially put
in the soc_info structure's intc_base field, is eventually
put in the global 'davinci_intc_base' so the low-level
interrupt code can access it without a dereference.

These changes enable the SoC default irq priorities to be
put in the SoC-specific files, and the interrupt controller
to be at any base address.

Signed-off-by: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

davinci: Add clock init call to common init routine

All of the davinci SoCs need to call davinci_clk_init() so
put the call in the common init routine.

Signed-off-by: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

davinci: Support JTAG ID register at any address

The Davinci cpu_is_davinci_*() macros use the SoC part number
and variant retrieved from the JTAG ID register to determine the
type of cpu that the kernel is running on. Currently, the code to
read the JTAG ID register assumes that the register is always at
the same base address. This isn't true on some newer SoCs.

To solve this, have the SoC-specific code set the JTAG ID register
base address in soc_info structure and add a 'cpu_id' member to it.
'cpu_id' will be used by the cpu_is_davinci_*() macros to match
the cpu id. Also move the info used to identify the cpu type into
the SoC-specific code to keep all SoC-specific code together.

The common code will read the JTAG ID register, search through
an array of davinci_id structures to identify the cpu type.
Once identified, it will set the 'cpu_id' member of the soc_info
structure to the proper value and the cpu_is_davinci_*() macros
will now work.

Signed-off-by: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

davinci: Encapsulate SoC-specific data in a structure

Create a structure to encapsulate SoC-specific information.
This will assist in generalizing code so it can be used by
different SoCs that have similar hardware but with minor
differences such as having a different base address.

The idea is that the code for each SoC fills out a structure
with the correct information. The board-specific code then
calls the SoC init routine which in turn will call a common
init routine that makes a copy of the structure, maps in I/O
regions, etc.

After initialization, code can get a pointer to the structure
by calling davinci_get_soc_info(). Eventually, the common
init routine will make a copy of all of the data pointed to
by the structure so the original data can be made __init_data.
That way the data for SoC's that aren't being used won't consume
memory for the entire life of the kernel.

The structure will be extended in subsequent patches but
initially, it holds the map_desc structure for any I/O
regions the SoC/board wants statically mapped.

Signed-off-by: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>