When a Tegra GPIO is used as an IRQ, it should be enabled as a GPIO (so
the pinmux module isn't driving it as an output) and configured as a GPIO
input (so the GPIO module isn't driving it as an output). Set this up
automatically whenever an IRQ is requested, so that users of IRQs don't
need to do this.
Signed-off-by: NStephen Warren <swarren@nvidia.com>
Acked-by: NOlof Johansson <olof@lixom.net>

When Tegra30 support was added to the Tegra GPIO driver, a few places
which iterated over all banks were not converted to use the variable
tegra_gpio_bank_count rather than hard-coding the bank count. Fix this.
Signed-off-by: NStephen Warren <swarren@nvidia.com>
Acked-by: NOlof Johansson <olof@lixom.net>

Tegra20 and Tegra30 share the same register layout within registers, but
the addresses of the registers is a little different. Fix the driver to
cope with this.
Signed-off-by: NStephen Warren <swarren@nvidia.com>
Acked-by: NOlof Johansson <olof@lixom.net>

This function is called from non-__init context, just like
tegra_gpio_enable()/disable(). Remove the __init annotation to avoid
section mismatch warnings during compile.
Signed-off-by: NStephen Warren <swarren@wwwdotorg.org>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

These two functions are used in drivers that can be
modules, so they need to be exported.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NAlan Ott <alan@signal11.us>
Acked-by: NOlof Johansson <olof@lixom.net>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

Commit 7da5a66 "irq_domain: Remove 'new' irq_domain in favour of the
ppc one" changed the set of available irq domain APIs. Update the Tegra
GPIO driver to account for those changes, to solve a build break.
Signed-off-by: NStephen Warren <swarren@nvidia.com>
Signed-off-by: NOlof Johansson <olof@lixom.net>

Tegra20's GPIO controller has 7 banks, and Tegra30's controller has 8
banks. Allow the number of banks to be configured at run-time by the
device tree.
Signed-off-by: NStephen Warren <swarren@nvidia.com>
Acked-by: NGrant Likely <grant.likely@secretlab.ca>
Signed-off-by: NOlof Johansson <olof@lixom.net>

Enhance the driver to dynamically allocate the base IRQ number, and
create an IRQ domain for itself. The use of an IRQ domain ensures that
any device tree node interrupts properties are correctly parsed.

Describe interrupt-related properties in the device tree binding docs,
and the contents of "child" node interrupts property.

Update tegra*.dtsi to specify the required interrupt-related properties.

Finally, remove the definition of TEGRA_GPIO_TO_IRQ; this macro no longer
gives correct results since the IRQ numbers for GPIOs are dynamically
allocated.
Signed-off-by: NStephen Warren <swarren@nvidia.com>
Acked-by: NGrant Likely <grant.likely@secretlab.ca>
Signed-off-by: NOlof Johansson <olof@lixom.net>

Reimplement a call to devm_request_mem_region followed by a call to ioremap
or ioremap_nocache by a call to devm_request_and_ioremap.

The semantic patch that makes this transformation is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@nm@
expression myname;
identifier i;
@@

struct platform_driver i = { .driver = { .name = myname } };

@@
expression dev,res,size;
expression nm.myname;
@@

-if (!devm_request_mem_region(dev, res->start, size,
-                              \(res->name\|dev_name(dev)\|myname\))) {
-   ...
-   return ...;
-}
... when != res->start
(
-devm_ioremap(dev,res->start,size)
+devm_request_and_ioremap(dev,res)
|
-devm_ioremap_nocache(dev,res->start,size)
+devm_request_and_ioremap(dev,res)
)
... when any
    when != res->start
// </smpl>
Signed-off-by: NJulia Lawall <julia@diku.dk>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

v3: Make regs variable static. Remove empty init of tegra_gpio_banks.

v2: Retrieve IRQ and memory addresses from resources instead of hard-
coding them. Add back initialization of tegra_gpio_chip.of_node.
Signed-off-by: NStephen Warren <swarren@nvidia.com>
Acked-by: NGrant Likely <grant.likely@secretlab.ca>
[olof: switched probe routine to __devinit]
Signed-off-by: NOlof Johansson <olof@lixom.net>

This will eventually allow <mach/gpio.h> to be deleted. This mirrors
LinusW's recent equivalent work on various other ARM platforms.
Signed-off-by: NStephen Warren <swarren@nvidia.com>
Acked-by: NOlof Johansson <olof@lixom.net>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Signed-off-by: NStephen Warren <swarren@nvidia.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

irq_to_gpio is being removed. Replace the only use of that API by
the ARM Tegra sub-architecture.
Signed-off-by: NStephen Warren <swarren@nvidia.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Engineering names are more stable than marketing names. Hence, use them
for Device Tree compatible properties instead.
Signed-off-by: NStephen Warren <swarren@nvidia.com>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

Add support for decoding gpios from the device tree
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
Acked-by: NOlof Johansson <olof@lixom.net>

As part of the gpio driver consolidation, this patch moves the Tegra driver
into drivers/gpio
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
Acked-by: NOlof Johansson <olof@lixom.net>
Acked-by: NColin Cross <ccross@android.com>

This patch updates the Tegra gpio chained IRQ handler to use the chained
IRQ enter/exit functions in order to function correctly on primary
controllers with different methods of flow control.

This is required for the GIC to move to fasteoi interrupt handling.
Acked-by: NColin Cross <ccross@android.com>
Signed-off-by: NWill Deacon <will.deacon@arm.com>

Change b0f18eda
(arm: tegra: Remove unused bogus irq enable/disable magic)
introduces warnings:
arch/arm/mach-tegra/gpio.c: In function 'tegra_gpio_resume':
arch/arm/mach-tegra/gpio.c:260: warning: unused variable 'i'
arch/arm/mach-tegra/gpio.c: In function 'tegra_gpio_suspend':
arch/arm/mach-tegra/gpio.c:283: warning: unused variable 'i'

Fix them, and fix a coding style issue on the same lines.
Signed-off-by: NColin Cross <ccross@android.com>
Acked-by: NErik Gilling <konkers@konkers.net>

Use irq_set_chip_and_handler() instead. Converted with coccinelle.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>

Convert to the new function names. Automated with coccinelle.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>

Remove the open coded access to irq_desc which will fail on sparse irq
and use the proper wrappers.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>

The core code handles thees already.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Cc: Colin Cross <ccross@android.com>
Cc: linux-tegra@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org

To give one place to setup the pins that are used as GPIOs instead
of as their pinmuxed functions. Specifying enabled as false explicitly
disables the gpio mode of that pin (if left on by firmware).

This should remove the need for calling these from specific drivers and
thus reduce tegra-specific code from them.
Signed-off-by: NOlof Johansson <olof@lixom.net>
Acked-by: NErik Gilling <konkers@android.com>

Signed-off-by: NColin Cross <ccross@android.com>

Commit 37337a8d, "ARM: tegra: irq_data
conversion." missed changing one reference to 'irq' in the function
tegra_gpio_irq_set_type().  This patch fixes the build error.
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
Acked-by: NLennert Buytenhek <buytenh@secretlab.ca>
Acked-by: NOlof Johansson <olof@lixom.net>
Signed-off-by: NColin Cross <ccross@android.com>

Signed-off-by: NLennert Buytenhek <buytenh@secretlab.ca>

Includes checkpatch fixes and TEGRA_NR_GPIOS changes from
Mike Rapoport <mike@compulab.co.il>
Signed-off-by: NColin Cross <ccross@android.com>

v2: fixes from Mike Rapoport:
	- move gpio-names.h to arch/arm/mach-tegra
    fixes from Russell King
	- include linux/io.h and linux/gpio.h instead of asm/io.h
	  and asm/gpio.h
    additional changes:
    	- add macros to convert between irq and gpio numbers for platform data
	- change for_each_bit to for_each_set_bit in gpio.c
v3:
	- minor bugfixes
Signed-off-by: NColin Cross <ccross@android.com>
Signed-off-by: NErik Gilling <konkers@android.com>