This patch adds driver data (bank list and EINT layout) for Exynos3250
to pinctrl-exynos driver. Exynos3250 includes 158 multi-functional input/output
ports. There are 23 general port groups.

Changes from v1:
- Add signed-off of sender
- Post only separated patch for pinctrl from following patchset(v1)
  : https://lkml.org/lkml/2014/4/10/286

Cc: Thomas Abraham <thomas.abraham@linaro.org>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: NTomasz Figa <t.figa@samsung.com>
Signed-off-by: NChanwoo Choi <cw00.choi@samsung.com>
Acked-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Adds pinctrl support for all platforms based on EXYNOS5260 SoC.
Acked-by: NTomasz Figa <t.figa@samsung.com>
Signed-off-by: NPankaj Dubey <pankaj.dubey@samsung.com>
Signed-off-by: NYoung-Gun Jang <yg1004.jang@samsung.com>
Signed-off-by: NRahul Sharma <rahul.sharma@samsung.com>
Signed-off-by: NArun Kumar K <arun.kk@samsung.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

The data structure of_match_ptr() protects is always compiled in.
Hence of_match_ptr() is not needed.

This is a squash commit of:
pinctrl: at91: Remove redundant of_match_ptr
pinctrl: exynos5440: Remove redundant of_match_ptr
pinctrl: imx35: Remove redundant of_match_ptr
pinctrl: imx51: Remove redundant of_match_ptr
pinctrl: imx53: Remove redundant of_match_ptr
pinctrl: imx6dl: Remove redundant of_match_ptr
pinctrl: imx6q: Remove redundant of_match_ptr
pinctrl: samsung: Remove redundant of_match_ptr
pinctrl: vf610: Remove redundant of_match_ptr
pinctrl: imx6sl: Remove redundant of_match_ptr
pinctrl: plgpio: Remove redundant of_match_ptr
Acked-by: NViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: NSachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

This patch implements pinctrl support and adds device tree bindings
for s5pv210.
Signed-off-by: NMateusz Krawczuk <m.krawczuk@partner.samsung.com>
Acked-by: NSylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

When setting pin configuration in the pinctrl framework, pin_config_set() or
pin_config_group_set() is called in a loop to set one configuration at a time
for the specified pin or group.

This patch 1) removes the loop and 2) changes the API to pass the whole pin
config array to the driver.  It is now up to the driver to loop through the
configs.  This allows the driver to potentially combine configs and reduce the
number of writes to pin config registers.

All c files changed have been build-tested to verify the change compiles and
that the corresponding .o is successfully generated.
Signed-off-by: NSherman Yin <syin@broadcom.com>
Reviewed-by: NChristian Daudt <csd@broadcom.com>
Reviewed-by: NMatt Porter <matt.porter@linaro.org>
Tested-by: NStephen Warren <swarren@nvidia.com>
Acked-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Calling pinctrl_register() means that the driver is fully initialized
and might accept pinmux/pinconf requests, so pin groups must be parsed
before.

This patch fixes this problem by moving device tree parsing before call
to pinctrl_register(). In addition, this fixes support for hogs on
pin controllers handled by pinctrl-samsung driver.
Signed-off-by: NTomasz Figa <t.figa@samsung.com>
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

'drvdata_list' is used only in this file. Make it static.
Signed-off-by: NSachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Add Samsung EXYNOS5420 SoC specific data to enable pinctrl
support for all platforms based on EXYNOS5420.
Signed-off-by: NLeela Krishna Amudala <l.krishna@samsung.com>
Reviewed-by: NDoug Anderson <dianders@chromium.org>
Acked-by: NTomasz Figa <t.figa@samsung.com>
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Tested-by : Sunil Joshi <joshi@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

SoC-specific driver might require additional save and restore of
registers. This patch adds pair of SoC-specific callbacks per pinctrl
device to account for this.
Signed-off-by: NTomasz Figa <t.figa@samsung.com>
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>
Tested-by: NDoug Anderson <dianders@chromium.org>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

The GPIO states need to be restored after s2r and this is not currently
supported in the pinctrl driver. This patch saves the gpio states before
suspend and restores them after resume.

Saving and restoring is done very early using syscore_ops and must
happen before pins are released from their powerdown state.

Patch originally from Prathyush K <prathyush.k@samsung.com> but
rewritten by Doug Anderson <dianders@chromium.org>.
Signed-off-by: NPrathyush K <prathyush.k@samsung.com>
Signed-off-by: NDoug Anderson <dianders@chromium.org>
Tested-by: NTomasz Figa <t.figa@samsung.com>
Acked-by: NKukjin Kim <kgene.kim@samsung.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

The s3c24xx pins follow a similar pattern as the other Samsung SoCs and
can therefore reuse the already introduced infrastructure.

The s3c24xx SoCs have one design oddity in that the first 4 external
interrupts do not reside in the eint pending register but in the main
interrupt controller instead. We solve this by forwarding the external
interrupt from the main controller into the irq domain of the pin bank.
The masking/acking of these interrupts is handled in the same way.

Furthermore the S3C2412/2413 SoCs contain another oddity in that they
keep the same 4 eints in the main interrupt controller and eintpend
register and requiring ack operations to happen in both. This is solved
by using different compatible properties for the wakeup eint node which
set a property accordingly.
Signed-off-by: NHeiko Stuebner <heiko@sntech.de>
Reviewed-by: NTomasz Figa <t.figa@samsung.com>
Reviewed-by: NSylwester Nawrocki <s.nawrocki@samsung.com>
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

devm_ioremap_resource does sanity checks on the given resource. No need to
duplicate this in the driver.
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

This patch adds pinctrl-s3c64xx driver which implements pin control
interface for Samsung S3C64xx SoCs.
Signed-off-by: NTomasz Figa <tomasz.figa@gmail.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

This patch adds support for banks that have more than one function
configuration registers, e.g. some of the banks of S3C64xx SoCs.
Signed-off-by: NTomasz Figa <tomasz.figa@gmail.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

This patch replaces statically hardcoded register offsets of Exynos SoCs
with an array of register offsets in samsung_pin_bank_type struct.

Thanks to this change, support for SoCs with other set and order of
registers can be added (e.g. S3C24xx and S3C64xx).
Signed-off-by: NTomasz Figa <tomasz.figa@gmail.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

This patch splits pin bank description into two structures, one
describing bank type (currently only bitfield widths), which can be
shared across multiple banks and second containing bank-specific
parameters including a pointer to a bank type struct.

It is a prerequisite for further patch removing the statically hardcoded
register offsets, making it impossible to support SoCs with different
set and order of pin control registers.
Signed-off-by: NTomasz Figa <tomasz.figa@gmail.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Since pinctrl-samsung is a common part of the pin control support for
several Samsung SoCs, it can be compiled without Exynos support enabled.

This patch surrounds Exynos-specific driver data with ifdefs to include
them only when support for Exynos is enabled.
Signed-off-by: NTomasz Figa <tomasz.figa@gmail.com>
[Fixed up EXYNOS4->EXYNOS]
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Certain pin control registers can be accessed from different contexts,
i.e. pinctrl, gpio and irq functions. This makes the locking provided by
pin control core insufficient.

This patch adds necessary locking using a per bank spinlock as it was
done in the old Samsung GPIO driver.
Signed-off-by: NTomasz Figa <tomasz.figa@gmail.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

The pinconf, pinctrl and pinmux operation structures hold function
pointers that are never modified. Declare them as const.
Signed-off-by: NLaurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Add Samsung Exynos5250 SoC specific data to enable pinctrl support for
all platforms based on Exynos5250.
Signed-off-by: NThomas Abraham <thomas.abraham@linaro.org>
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Reviewed-by: NTomasz Figa <t.figa@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

This patch removes duplicated line of samsung_pinctrl_register(),
because the number of pins is redundantly assigned twice.
Reviewed-by: NTomasz Figa <t.figa@samsung.com>
Acked-by: NKukjin Kim <kgene.kim@samsung.com>
Signed-off-by: NJingoo Han <jg1.han@samsung.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Fix the incorrect compatible property value of pinctrl for EXYNOS4 SoCs.

Cc: Thomas Abraham <thomas.ab@samsung.com>
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Cc: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Convert all uses of devm_request_and_ioremap() to the newly introduced
devm_ioremap_resource() which provides more consistent error handling.

devm_ioremap_resource() provides its own error messages so all explicit
error messages can be removed from the failure code paths.
Signed-off-by: NThierry Reding <thierry.reding@avionic-design.de>
Cc: Linus Walleij <linus.walleij@linaro.org>
Acked-by: NViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

CONFIG_HOTPLUG is going away as an option.  As a result, the __dev*
markings need to be removed.

This change removes the use of __devinit, __devexit_p, __devinitdata,
and __devexit from these drivers.

Based on patches originally written by Bill Pemberton, but redone by me
in order to handle some of the coding style issues better, by hand.

Cc: Bill Pemberton <wfp5p@virginia.edu>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com>
Cc: Stephen Warren <swarren@wwwdotorg.org>
Cc: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
Cc: Barry Song <baohua.song@csr.com>
Cc: Viresh Kumar <viresh.linux@gmail.com>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Cc: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

I got below build error with random config if CONFIG_PINCTRL_SAMSUNG=y &&
CONFIG_PINCTRL_EXYNOS5440=y.

Fix the build error by making pcfgs static.

  LD      drivers/pinctrl/built-in.o
drivers/pinctrl/pinctrl-exynos5440.o: In function `.LANCHOR0':
pinctrl-exynos5440.c:(.data+0x54): multiple definition of `pcfgs'
drivers/pinctrl/pinctrl-samsung.o:pinctrl-samsung.c:(.data+0x54): first defined here
make[2]: *** [drivers/pinctrl/built-in.o] Error 1
make[1]: *** [drivers/pinctrl] Error 2
make: *** [drivers] Error 2
Signed-off-by: NAxel Lin <axel.lin@ingics.com>
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Acked-by: NThomas Abraham <thomas.abraham@linaro.org>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Static variables are initialised to 0 by GCC.
Fixes the following checkpatch error:
ERROR: do not initialise statics to 0 or NULL
FILE: pinctrl/pinctrl-samsung.c:50:
static unsigned int pin_base = 0;
Signed-off-by: NSachin Kamat <sachin.kamat@linaro.org>
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Checking '< 0' for unsigned variables always returns false. For error
codes, use IS_ERR_VALUE() instead.
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NTushar Behera <tushar.behera@linaro.org>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

This patch extends the driver with any necessary SoC-specific
definitions to support EXYNOS4X12 SoCs.
Signed-off-by: NTomasz Figa <t.figa@samsung.com>
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>
Acked-by: NThomas Abraham <thomas.abraham@linaro.org>
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Some drivers require a way to translate GPIO pins to their IRQ numbers.

This patch adds the .to_irq() gpiolib callback to pinctrl-samsung
driver, which creates (if not present yet) and returns an IRQ mapping
for given GPIO pin.
Signed-off-by: NTomasz Figa <t.figa@samsung.com>
Reviewed-by: NKyungmin Park <kyungmin.park@samsung.com>
Acked-by: NThomas Abraham <thomas.abraham@linaro.org>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

This patch modifies the pinctrl-samsung driver to register one GPIO chip
per pin bank, instead of a single chip for all pin banks of the
controller.

It simplifies GPIO accesses a lot (constant time instead of looping
through the list of banks to find the right one) and should have a good
effect on performance of any bit-banging driver.

In addition it allows to reference GPIO pins by a phandle to the bank
node and a local pin offset inside of the bank (similar to previous
gpiolib driver), which is more clear and readable than using indices
relative to the whole pin controller.

Example:
	device {
		/* ... */
		gpios = <&gpk0 4 0>;
		/* ... */
	};
Signed-off-by: NTomasz Figa <t.figa@samsung.com>
Reviewed-by: NKyungmin Park <kyungmin.park@samsung.com>
Acked-by: NThomas Abraham <thomas.abraham@linaro.org>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Instead of registering one IRQ domain for all pin banks of a pin
controller, this patch implements registration of per-bank domains.

At a cost of a little memory overhead (~2.5KiB for all GPIO interrupts
of Exynos4x12) it simplifies driver code and device tree sources,
because GPIO interrupts can be now specified per banks.

Example:
	device {
		/* ... */
		interrupt-parent = <&gpa1>;
		interrupts = <3 0>;
		/* ... */
	};
Signed-off-by: NTomasz Figa <t.figa@samsung.com>
Reviewed-by: NKyungmin Park <kyungmin.park@samsung.com>
Acked-by: NThomas Abraham <thomas.abraham@linaro.org>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

This patch is a preparation for converting the pinctrl-samsung driver to
one GPIO chip and IRQ domain per bank. It allows one having only
a pointer to particular bank struct to access driver data struct.
Signed-off-by: NTomasz Figa <t.figa@samsung.com>
Reviewed-by: NKyungmin Park <kyungmin.park@samsung.com>
Acked-by: NThomas Abraham <thomas.abraham@linaro.org>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

This patch is a preparation for converting the pinctrl-samsung driver to
one GPIO chip and IRQ domain per bank. It binds banks defined by
internal driver data with bank nodes in device tree.
Signed-off-by: NTomasz Figa <t.figa@samsung.com>
Reviewed-by: NKyungmin Park <kyungmin.park@samsung.com>
Acked-by: NThomas Abraham <thomas.abraham@linaro.org>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

This patch modifies the loop iterating over all child nodes and parsing
pin groups to check whether the node is really a pin group node by
checking for existence of samsung,pins property.

This is a prerequisite for further patches adding additional subnodes to
the pinctrl node, required for per bank GPIO and interrupt specifiers.
Signed-off-by: NTomasz Figa <t.figa@samsung.com>
Reviewed-by: NKyungmin Park <kyungmin.park@samsung.com>
Acked-by: NThomas Abraham <thomas.abraham@linaro.org>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

This patch modifies the pinctrl-samsung driver to assign numbers to pins
dynamically instead of static enumerations.

Thanks to this change the amount of code requried to support a SoC can
be greatly reduced and the code made more readable.
Signed-off-by: NTomasz Figa <t.figa@samsung.com>
Reviewed-by: NKyungmin Park <kyungmin.park@samsung.com>
Acked-by: NThomas Abraham <thomas.abraham@linaro.org>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

The pointer to gpio_chip passed to pin_to_reg_bank utility function is
used only to retrieve a pointer to samsung_pinctrl_drv_data structure.

This patch modifies the function and its users to pass a pointer to
samsung_pinctrl_drv_data directly.
Signed-off-by: NTomasz Figa <t.figa@samsung.com>
Reviewed-by: NKyungmin Park <kyungmin.park@samsung.com>
Acked-by: NThomas Abraham <thomas.abraham@linaro.org>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

This patch modifies the pinctrl-samsung driver to detect when width of a
bit field is set to zero (which means that such configuraton type is not
supported) and return an error instead of trying to modify an inexistent
register.
Signed-off-by: NTomasz Figa <t.figa@samsung.com>
Reviewed-by: NKyungmin Park <kyungmin.park@samsung.com>
Acked-by: NThomas Abraham <thomas.abraham@linaro.org>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

The samsung pinctrl driver has a probe function that is
__devinit and that calls a lot of other functions that are
marked __init, which kbuild complains about.

Marking everything __devinit means that the code does not
discarded when CONFIG_HOTPLUG is set, which is a little
more wasteful, but also more consistent

Without this patch, building exynos_defconfig results in:

WARNING: drivers/pinctrl/built-in.o(.devinit.text+0x124): Section mismatch in reference from the function samsung_pinctrl_probe() to the function .init.text:samsung_gpiolib_register()
The function __devinit samsung_pinctrl_probe() references
a function __init samsung_gpiolib_register().
If samsung_gpiolib_register is only used by samsung_pinctrl_probe then
annotate samsung_gpiolib_register with a matching annotation.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Cc: Thomas Abraham <thomas.abraham@linaro.org>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Stephen Warren <swarren@nvidia.com>
Cc: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Although the function is used only a single time, it is not performance
critical and it is pretty heavy, so let the compiler decide whether to
inline it instead.
Signed-off-by: NTomasz Figa <t.figa@samsung.com>
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Add a new device tree enabled pinctrl and gpiolib driver for Samsung
SoC's. This driver provides a common and extensible framework for all
Samsung SoC's to interface with the pinctrl and gpiolib subsystems. This
driver supports only device tree based instantiation and hence can be
used only on those Samsung platforms that have device tree enabled.

This driver is split into two parts: the pinctrl interface and the gpiolib
interface. The pinctrl interface registers pinctrl devices with the pinctrl
subsystem and gpiolib interface registers gpio chips with the gpiolib
subsystem. The information about the pins, pin groups, pin functions and
gpio chips, which are SoC specific, are parsed from device tree node.
Signed-off-by: NThomas Abraham <thomas.abraham@linaro.org>
Reviewed-by: NLinus Walleij <linus.walleij@linaro.org>
Acked-by: NStephen Warren <swarren@nvidia.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>