Merge tag 'gpio-v3.16-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio into next

Pull GPIO updates from Linus Walleij:
 "This is the bulk of GPIO changes for the v3.16 series.

  There is a lot of action in the GPIO subsystem doing refactorings and
  cleanups, almost as many deletions as insertions and minor feature
  growth and no new drivers this time.  Which is actually pretty nice.
  Some GPIO-related stuff will come in through the pin control tree as
  well.

  Details:

   - We are finalizing and fixing up the gpiochip irqchip helpers
     bringing a helpful irqchip implementation into the gpiolib core and
     avoiding duplicate code and, more importantly, duplicate bug fixes:

     * Support for using the helpers with threaded interrupt handlers as
       used on sleeping GPIO-irqchips

     * Do not set up hardware triggers for edges or levels if the
       default IRQ type is IRQ_TYPE_NONE - some drivers would exploit
       the fact that you could get default initialization of the IRQ
       type from the core at probe() but if no default type is set up
       from the helper, we should not call the driver to configure
       anything.  Wait until a consumer requests the interrupt instead.

     * Make the irqchip helpers put the GPIO irqs into their own lock
       class.  The GPIO irqchips can often emit (harmless, but annoying)
       lockdep warnings about recursions when they are in fact just
       cascaded IRQs.  By putting them into their own lock class we help
       the lockdep core to keep track of things.

     * Switch the tc3589x GPIO expanders to use the irqchip helpers

     * Switch the OMAP GPIO driver to use the irqchip helpers

     * Add some documentation for the irqchip helpers

     * select IRQ_DOMAIN when using the helpers since some platforms may
       not be using this by default and it's a strict dependency.

   - Continued GPIO descriptor refactoring:

     * Remove the one instance of gpio_to_desc() from the device tree
       code, making the OF GPIO code use GPIO descriptors only.

     * Introduce gpiod_get_optional() and gpiod_get_optional_index()
       akin to the similar regulator functions for cases where the use
       of GPIO is optional and not strictly required.

     * Make of_get_named_gpiod_flags() private - we do not want to
       unnecessarily expose APIs to drivers that make the gpiolib harder
       than necessary to maintain and refactor.  Privatize this
       function.

   - Support "-gpio" suffix for the OF GPIO retrieveal path.  We used to
     look for "foo-gpios" or just "gpios" in device tree nodes, but it
     turns out that some drivers with a single GPIO line will just state
     "foo-gpio" (singularis).  Sigh.  Support this with a fallback
     looking for it, as this simplifies driver code and handles it in
     core code.

   - Switch the ACPI GPIO core to fetch GPIOs with the *_cansleep
     function variants as the GPIO operation region handler can sleep,
     and shall be able to handle gpiochips that sleep.

   - Tons of cleanups and janitorial work from Jingoo Han, Axel Lin,
     Javier Martinez Canillas and Abdoulaye Berthe.  Notably Jingoo cut
     off a ton of pointless OOM messages.

   - Incremental development and fixes for various drivers, nothing
     really special here"

* tag 'gpio-v3.16-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (85 commits)
  gpio: select IRQ_DOMAIN for gpiolib irqchip helpers
  gpio: pca953x: use gpiolib irqchip helpers
  gpio: pcf857x: Add IRQF_SHARED when request irq
  gpio: pcf857x: Avoid calling irq_domain_cleanup twice
  gpio: mcp23s08: switch chip count to int
  gpio: dwapb: use a second irq chip
  gpio: ep93xx: Use devm_ioremap_resource()
  gpio: mcp23s08: fixed count variable for devicetree probing
  gpio: Add run-time dependencies to R-Car driver
  gpio: pch: add slab include
  Documentation / ACPI: Fix location of GPIO documentation
  gpio / ACPI: use *_cansleep version of gpiod_get/set APIs
  gpio: generic: add request function pointer
  gpio-pch: Fix Kconfig dependencies
  gpio: make of_get_named_gpiod_flags() private
  gpio: gpioep93xx: use devm functions
  gpio: janzttl: use devm function
  gpio: timberdale: use devm functions
  gpio: bt8xx: use devm function for memory allocation
  gpio: include linux/bug.h in interface header
  ...

1 files changed, 16 insertions, 4 deletions

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index a86c49a605c6..4a1b5113e527 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -56,6 +56,7 @@ config GPIO_ACPI
 	depends on ACPI
 
 config GPIOLIB_IRQCHIP
+	select IRQ_DOMAIN
 	bool
 
 config DEBUG_GPIO
@@ -243,6 +244,15 @@ config GPIO_OCTEON
 	  Say yes here to support the on-chip GPIO lines on the OCTEON
 	  family of SOCs.
 
+config GPIO_OMAP
+	bool "TI OMAP GPIO support" if COMPILE_TEST && !ARCH_OMAP2PLUS
+	default y if ARCH_OMAP
+	depends on ARM
+	select GENERIC_IRQ_CHIP
+	select GPIOLIB_IRQCHIP
+	help
+	  Say yes here to enable GPIO support for TI OMAP SoCs.
+
 config GPIO_PL061
 	bool "PrimeCell PL061 GPIO support"
 	depends on ARM_AMBA
@@ -259,7 +269,7 @@ config GPIO_PXA
 
 config GPIO_RCAR
 	tristate "Renesas R-Car GPIO"
-	depends on ARM
+	depends on ARM && (ARCH_SHMOBILE || COMPILE_TEST)
 	help
 	  Say yes here to support GPIO on Renesas R-Car SoCs.
 
@@ -510,6 +520,7 @@ config GPIO_PCA953X
 config GPIO_PCA953X_IRQ
 	bool "Interrupt controller support for PCA953x"
 	depends on GPIO_PCA953X=y
+	select GPIOLIB_IRQCHIP
 	help
 	  Say yes here to enable the pca953x to be used as an interrupt
 	  controller. It requires the driver to be built in the kernel.
@@ -579,6 +590,7 @@ config GPIO_STP_XWAY
 config GPIO_TC3589X
 	bool "TC3589X GPIOs"
 	depends on MFD_TC3589X
+	select GPIOLIB_IRQCHIP
 	help
 	  This enables support for the GPIOs found on the TC3589X
 	  I/O Expander.
@@ -699,13 +711,13 @@ config GPIO_AMD8111
 config GPIO_INTEL_MID
 	bool "Intel Mid GPIO support"
 	depends on PCI && X86
-	select IRQ_DOMAIN
+	select GPIOLIB_IRQCHIP
 	help
 	  Say Y here to support Intel Mid GPIO.
 
 config GPIO_PCH
 	tristate "Intel EG20T PCH/LAPIS Semiconductor IOH(ML7223/ML7831) GPIO"
-	depends on PCI && X86
+	depends on PCI && (X86_32 || COMPILE_TEST)
 	select GENERIC_IRQ_CHIP
 	help
 	  This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff
@@ -739,7 +751,7 @@ config GPIO_SODAVILLE
 
 config GPIO_TIMBERDALE
 	bool "Support for timberdale GPIO IP"
-	depends on MFD_TIMBERDALE && HAS_IOMEM
+	depends on MFD_TIMBERDALE
 	---help---
 	Add support for the GPIO IP in the timberdale FPGA.