ARM: s3c: make headers local if possible

A lot of header files are only used internally now, so they can be moved
to mach-s3c, out of the visibility of drivers.

Signed-off-by: Arnd Bergmann <arnd@a

ARM: s3c: make headers local if possible

A lot of header files are only used internally now, so they can be moved
to mach-s3c, out of the visibility of drivers.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20200806182059.2431-40-krzk@kernel.org
[krzk: Rebase and fixup leds-s3c24xx driver]
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

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ARM: s3c: move into a common directory

s3c24xx and s3c64xx have a lot in common, but are split across three
separate directories, which makes the interaction of the header files
more complicated tha

ARM: s3c: move into a common directory

s3c24xx and s3c64xx have a lot in common, but are split across three
separate directories, which makes the interaction of the header files
more complicated than necessary.

Move all three directories into a new mach-s3c, with a minimal
set of changes to each file.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
[krzk: Rebase, add s3c24xx and s3c64xx suffix to several files, add SPDX
headers to new files, remove plat-samsung from MAINTAINERS]
Co-developed-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
https://lore.kernel.org/r/20200806182059.2431-39-krzk@kernel.org

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ARM: S3C64XX: Add SPDX license identifiers

Replace GPL license statements with SPDX license identifiers (GPL-2.0
and GPL-2.0+).

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Charle

ARM: S3C64XX: Add SPDX license identifiers

Replace GPL license statements with SPDX license identifiers (GPL-2.0
and GPL-2.0+).

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>

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ARM: s3c64xx: allow building without board support

Most of the code for the s3c64xx platform is only used when booting
with ATAGS based board files, but not when using device-tree.

This tries to id

ARM: s3c64xx: allow building without board support

Most of the code for the s3c64xx platform is only used when booting
with ATAGS based board files, but not when using device-tree.

This tries to identify all the s3c64xx specific code that is
unneeded when CONFIG_ATAGS is not set, so we can build a smaller
DT-only kernel if configured that way.

All board support is still left intact but now depends on the
CONFIG_ATAGS symbol that users may intentionally disable.

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

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ARM: S3C[24|64]xx: move includes back under <mach/> scope

When refactoring and breaking out the includes for the
machine-specific GPIO configuration, two files were created
in <linux/platform_data/g

ARM: S3C[24|64]xx: move includes back under <mach/> scope

When refactoring and breaking out the includes for the
machine-specific GPIO configuration, two files were created
in <linux/platform_data/gpio-samsung-s3c[24|64]xx.h>, but as
that namespace shall be used for defining data exchanged
between machines and drivers, using it for these broad macros
and config settings is wrong.

Move the headers back into the machine-local
<mach/gpio-samsung.h> file and think about the next step.

Reported-by: Arnd Bergmann <arnd@arndb.de>
Cc: Tomasz Figa <tomasz.figa@gmail.com>
Cc: Sylwester Nawrocki <sylvester.nawrocki@gmail.com>
Cc: Ben Dooks <ben-linux@fluff.org>
Cc: Kukjin Kim <kgene.kim@samsung.com>
Cc: linux-samsung-soc@vger.kernel.org
Acked-by: Mark Brown <broonie@linaro.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

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ARM: s3c64xx: get rid of custom <mach/gpio.h>

This isolates the custom S3C64xx GPIO definition table to
<linux/platform_data/gpio-samsung-s3x64xx.h> as this is
used in a few different places in the

ARM: s3c64xx: get rid of custom <mach/gpio.h>

This isolates the custom S3C64xx GPIO definition table to
<linux/platform_data/gpio-samsung-s3x64xx.h> as this is
used in a few different places in the kernel, removing the
need to depend on the implicit inclusion of <mach/gpio.h>
from <linux/gpio.h> and thus getting rid of a few nasty
cross-dependencies.

Also delete the CONFIG_SAMSUNG_GPIO_EXTRA stuff. Instead
roof the number of GPIOs for this platform:
First sum up all the GPIO banks from A to Q: 187 GPIOs.
Add the 16 "board GPIOs" and the roof for SAMSUNG_GPIO_EXTRA,
128, so in total maximum 187+16+128 = 331 GPIOs, so let's
take the same roof as for S3C24XX: 512. This way we can do
away with the GPIO calculation macros for GPIO_BOARD_START,
BOARD_NR_GPIOS and the definition of ARCH_NR_GPIOS.

Cc: Mark Brown <broonie@kernel.org>
[on Mini6410 board]
Tested-by: Tomasz Figa <t.figa@samsung.com>
[for changes in mach-s3c64xx]
Acked-by: Tomasz Figa <t.figa@samsung.com>
Tested-by: Mark Brown <broonie@linaro.org>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

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ARM: S3C64XX: Update for conversion to SAMSUNG_GPIO_EXTRA

The conversion of the S3C64XX GPIOs to the generic Samsung GPIOs mean that
rather than using the previous S3C24XX_GPIO_EXTRA configuration t

ARM: S3C64XX: Update for conversion to SAMSUNG_GPIO_EXTRA

The conversion of the S3C64XX GPIOs to the generic Samsung GPIOs mean that
rather than using the previous S3C24XX_GPIO_EXTRA configuration the driver
now uses SAMSUNG_GPIO_EXTRA.

Since SAMSUNG_GPIO_EXTRA requires the arch to include the extra space in
ARCH_NR_GPIOs add it on to BOARD_NR_GPIOs (in case boards are relying on
the existing reservation).

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

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ARM: gpio: make trivial GPIOLIB implementation the default

Rather than marking the mach/gpio.h header files which want to use the
trivial GPIOLIB implementation, mark those which do not want to use

ARM: gpio: make trivial GPIOLIB implementation the default

Rather than marking the mach/gpio.h header files which want to use the
trivial GPIOLIB implementation, mark those which do not want to use it
instead. This means that by default, you get the trivial implementation
and only have to do something extra if you need to. This should
encourage the use of the trivial default implementation.

As an additional bonus, several gpio.h header files become empty.

Acked-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Tested-by: Jamie Iles <jamie@jamieiles.com>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

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ARM: gpio: consolidate gpio_to_irq

Many of the gpio_to_irq implementations use the gpiolib version of this
function. Provide the standard gpiolib gpio_to_irq() for everyone, but
allow platforms to

ARM: gpio: consolidate gpio_to_irq

Many of the gpio_to_irq implementations use the gpiolib version of this
function. Provide the standard gpiolib gpio_to_irq() for everyone, but
allow platforms to override it if they wish. Add the neccessary
overrides for those platforms which do not use the standard definition.

Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

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ARM: gpio: consolidate trivial gpiolib implementations

Consolidate 24 trivial gpiolib implementions out of mach/gpio.h
into asm/gpio.h. This is basically the include of asm-generic/gpio.h
and the d

ARM: gpio: consolidate trivial gpiolib implementations

Consolidate 24 trivial gpiolib implementions out of mach/gpio.h
into asm/gpio.h. This is basically the include of asm-generic/gpio.h
and the definition of gpio_get_value, gpio_set_value, and gpio_cansleep
as described in Documentation/gpio.txt

Acked-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Tested-by: David Brown <davidb@codeaurora.org>
Acked-by: David Brown <davidb@codeaurora.org>
Tested-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Tested-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

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ARM: S3C64XX: Add initial support for board specific IRQs

Follow the scheme used for IRQs. By default 16 GPIOs are allocated
for board use.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicr

ARM: S3C64XX: Add initial support for board specific IRQs

Follow the scheme used for IRQs. By default 16 GPIOs are allocated
for board use.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>

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ARM: S3C64XX: Merge mach-s3c6400 and mach-s3c6410

As per discussions with Russell King on linux-arm-kernel, it appears that
both mach-s3c6400 and mach-s3c6410 are so close together that they should

ARM: S3C64XX: Merge mach-s3c6400 and mach-s3c6410

As per discussions with Russell King on linux-arm-kernel, it appears that
both mach-s3c6400 and mach-s3c6410 are so close together that they should
simply be merged into mach-s3c64xx.

Note, this patch does not eliminate any of the bits that are still common,
it is simply a move of the two directories together, any further common
code will be eliminated or moved in further patches.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>

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[ARM] S3C: Move common GPIO code from plat-s3c24xx

Move the common parts of the GPIO code into plat-s3c
for use with both the s3c24xx and s3c64xx systems.

Signed-off-by: Ben Dooks <ben-linux@fluff.

[ARM] S3C: Move common GPIO code from plat-s3c24xx

Move the common parts of the GPIO code into plat-s3c
for use with both the s3c24xx and s3c64xx systems.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>

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[ARM] S3C64XX: Add gpio bank numbering

Define the gpio numbers for the S3C64XX GPIO banks
available on the S3C6400 and S3C6410.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>

[ARM] S3C64XX: Initial arch header files

Add the initial header files for the S3C64XX support to satisfy the
minimal requirements to build a kernel. Some definitions will therefore
be placeholders o

[ARM] S3C64XX: Initial arch header files

Add the initial header files for the S3C64XX support to satisfy the
minimal requirements to build a kernel. Some definitions will therefore
be placeholders or empty functions that will ensure that the system can
build and have base functionality. These will be filled in at a later
date.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>

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