Merge tag 'gpio-v4.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio

Pull GPIO updates from Linus Walleij:
 "This is the bulk of GPIO changes for kernel cycle v4.7:

  Core infrastructural changes:

   - Support for natively single-ended GPIO driver stages.

     This means that if the hardware has registers to configure open
     drain or open source configuration, we use that rather than (as we
     did before) try to emulate it by switching the line to an input to
     get high impedance.

     This is also documented throughly in Documentation/gpio/driver.txt
     for those of you who did not understand one word of what I just
     wrote.

   - Start to do away with the unnecessarily complex and unitelligible
     ARCH_REQUIRE_GPIOLIB and ARCH_WANT_OPTIONAL_GPIOLIB, another
     evolutional artifact from the time when the GPIO subsystem was
     unmaintained.

     Archs can now just select GPIOLIB and be done with it, cleanups to
     arches will trickle in for the next kernel.  Some minor archs ACKed
     the changes immediately so these are included in this pull request.

   - Advancing the use of the data pointer inside the GPIO device for
     storing driver data by switching the PowerPC, Super-H Unicore and
     a few other subarches or subsystem drivers in ALSA SoC, Input,
     serial, SSB, staging etc to use it.

   - The initialization now reads the input/output state of the GPIO
     lines, so that each GPIO descriptor knows - if this callback is
     implemented - whether the line is input or output.  This also
     reflects nicely in userspace "lsgpio".

   - It is now possible to name GPIO producer names, line names, from
     the device tree.  (Platform data has been supported for a while).
     I bet we will get a similar mechanism for ACPI one of those days.
     This makes is possible to get sensible producer names for e.g.
     GPIO rails in "lsgpio" in userspace.

  New drivers:

   - New driver for the Loongson1.

   - The XLP driver now supports Broadcom Vulcan ARM64.

   - The IT87 driver now supports IT8620 and IT8628.

   - The PCA953X driver now supports Galileo Gen2.

  Driver improvements:

   - MCP23S08 was switched to use the gpiolib irqchip helpers and now
     also suppors level-triggered interrupts.

   - 74x164 and RCAR now supports the .set_multiple() callback

   - AMDPT was converted to use generic GPIO.

   - TC3589x, TPS65218, SX150X, F7188X, MENZ127, VX855, WM831X, WM8994
     support the new single ended callback for open drain and in some
     cases open source.

   - Implement the .get_direction() callback for a few more drivers like
     PL061, Xgene.

  Cleanups:

   - Paul Gortmaker combed through the drivers and de-modularized those
     who are not really modules.

   - Move the GPIO poweroff DT bindings to the power subdir where they
     belong.

   - Rename gpio-generic.c to gpio-mmio.c, which is much more to the
     point.  That's what it is handling, nothing more, nothing less"

* tag 'gpio-v4.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (126 commits)
  MIPS: do away with ARCH_[WANT_OPTIONAL|REQUIRE]_GPIOLIB
  gpio: zevio: make it explicitly non-modular
  gpio: timberdale: make it explicitly non-modular
  gpio: stmpe: make it explicitly non-modular
  gpio: sodaville: make it explicitly non-modular
  pinctrl: sh-pfc: Let gpio_chip.to_irq() return zero on error
  gpio: dwapb: Add ACPI device ID for DWAPB GPIO controller on X-Gene platforms
  gpio: dt-bindings: add wd,mbl-gpio bindings
  gpio: of: make it possible to name GPIO lines
  gpio: make gpiod_to_irq() return negative for NO_IRQ
  gpio: xgene: implement .get_direction()
  gpio: xgene: Enable ACPI support for X-Gene GFC GPIO driver
  gpio: tegra: Implement gpio_get_direction callback
  gpio: set up initial state from .get_direction()
  gpio: rename gpio-generic.c into gpio-mmio.c
  gpio: generic: fix GPIO_GENERIC_PLATFORM is set to module case
  gpio: dwapb: add gpio-signaled acpi event support
  gpio: dwapb: convert device node to fwnode
  gpio: dwapb: remove name from dwapb_port_property
  gpio/qoriq: select IRQ_DOMAIN
  ...

arch/mips/Kconfig

@@ -79,7 +79,7 @@ config MIPS_ALCHEMY
 	select SYS_HAS_CPU_MIPS32_R1
 	select SYS_SUPPORTS_32BIT_KERNEL
 	select SYS_SUPPORTS_APM_EMULATION
-	select ARCH_REQUIRE_GPIOLIB
+	select GPIOLIB
 	select SYS_SUPPORTS_ZBOOT
 	select COMMON_CLK
 
@@ -98,7 +98,7 @@ config AR7
 	select SYS_SUPPORTS_LITTLE_ENDIAN
 	select SYS_SUPPORTS_MIPS16
 	select SYS_SUPPORTS_ZBOOT_UART16550
-	select ARCH_REQUIRE_GPIOLIB
+	select GPIOLIB
 	select VLYNQ
 	select HAVE_CLK
 	help
@@ -122,11 +122,11 @@ config ATH25
 config ATH79
 	bool "Atheros AR71XX/AR724X/AR913X based boards"
 	select ARCH_HAS_RESET_CONTROLLER
-	select ARCH_REQUIRE_GPIOLIB
 	select BOOT_RAW
 	select CEVT_R4K
 	select CSRC_R4K
 	select DMA_NONCOHERENT
+	select GPIOLIB
 	select HAVE_CLK
 	select COMMON_CLK
 	select CLKDEV_LOOKUP
@@ -170,7 +170,6 @@ config BMIPS_GENERIC
 	select USB_EHCI_BIG_ENDIAN_MMIO if CPU_BIG_ENDIAN
 	select USB_OHCI_BIG_ENDIAN_DESC if CPU_BIG_ENDIAN
 	select USB_OHCI_BIG_ENDIAN_MMIO if CPU_BIG_ENDIAN
-	select ARCH_WANT_OPTIONAL_GPIOLIB
 	help
 	  Build a generic DT-based kernel image that boots on select
 	  BCM33xx cable modem chips, BCM63xx DSL chips, and BCM7xxx set-top
@@ -179,7 +178,6 @@ config BMIPS_GENERIC
 
 config BCM47XX
 	bool "Broadcom BCM47XX based boards"
-	select ARCH_WANT_OPTIONAL_GPIOLIB
 	select BOOT_RAW
 	select CEVT_R4K
 	select CSRC_R4K
@@ -211,7 +209,7 @@ config BCM63XX
 	select SYS_SUPPORTS_BIG_ENDIAN
 	select SYS_HAS_EARLY_PRINTK
 	select SWAP_IO_SPACE
-	select ARCH_REQUIRE_GPIOLIB
+	select GPIOLIB
 	select HAVE_CLK
 	select MIPS_L1_CACHE_SHIFT_4
 	help
@@ -305,7 +303,7 @@ config MACH_INGENIC
 	select SYS_SUPPORTS_ZBOOT_UART16550
 	select DMA_NONCOHERENT
 	select IRQ_MIPS_CPU
-	select ARCH_REQUIRE_GPIOLIB
+	select GPIOLIB
 	select COMMON_CLK
 	select GENERIC_IRQ_CHIP
 	select BUILTIN_DTB
@@ -325,7 +323,7 @@ config LANTIQ
 	select SYS_SUPPORTS_MIPS16
 	select SYS_SUPPORTS_MULTITHREADING
 	select SYS_HAS_EARLY_PRINTK
-	select ARCH_REQUIRE_GPIOLIB
+	select GPIOLIB
 	select SWAP_IO_SPACE
 	select BOOT_RAW
 	select CLKDEV_LOOKUP
@@ -377,7 +375,6 @@ config MACH_LOONGSON64
 
 config MACH_PISTACHIO
 	bool "IMG Pistachio SoC based boards"
-	select ARCH_REQUIRE_GPIOLIB
 	select BOOT_ELF32
 	select BOOT_RAW
 	select CEVT_R4K
@@ -385,6 +382,7 @@ config MACH_PISTACHIO
 	select COMMON_CLK
 	select CSRC_R4K
 	select DMA_MAYBE_COHERENT
+	select GPIOLIB
 	select IRQ_MIPS_CPU
 	select LIBFDT
 	select MFD_SYSCON
@@ -406,13 +404,13 @@ config MACH_PISTACHIO
 
 config MACH_XILFPGA
 	bool "MIPSfpga Xilinx based boards"
-	select ARCH_REQUIRE_GPIOLIB
 	select BOOT_ELF32
 	select BOOT_RAW
 	select BUILTIN_DTB
 	select CEVT_R4K
 	select COMMON_CLK
 	select CSRC_R4K
+	select GPIOLIB
 	select IRQ_MIPS_CPU
 	select LIBFDT
 	select MIPS_CPU_SCACHE
@@ -536,7 +534,7 @@ config MACH_VR41XX
 	select CSRC_R4K
 	select SYS_HAS_CPU_VR41XX
 	select SYS_SUPPORTS_MIPS16
-	select ARCH_REQUIRE_GPIOLIB
+	select GPIOLIB
 
 config NXP_STB220
 	bool "NXP STB220 board"
@@ -856,7 +854,7 @@ config MIKROTIK_RB532
 	select SYS_SUPPORTS_LITTLE_ENDIAN
 	select SWAP_IO_SPACE
 	select BOOT_RAW
-	select ARCH_REQUIRE_GPIOLIB
+	select GPIOLIB
 	select MIPS_L1_CACHE_SHIFT_4
 	help
 	  Support the Mikrotik(tm) RouterBoard 532 series,
@@ -879,7 +877,7 @@ config CAVIUM_OCTEON_SOC
 	select HW_HAS_PCI
 	select ZONE_DMA32
 	select HOLES_IN_ZONE
-	select ARCH_REQUIRE_GPIOLIB
+	select GPIOLIB
 	select LIBFDT
 	select USE_OF
 	select ARCH_SPARSEMEM_ENABLE
@@ -937,7 +935,7 @@ config NLM_XLP_BOARD
 	select SYS_SUPPORTS_32BIT_KERNEL
 	select SYS_SUPPORTS_64BIT_KERNEL
 	select ARCH_PHYS_ADDR_T_64BIT
-	select ARCH_REQUIRE_GPIOLIB
+	select GPIOLIB
 	select SYS_SUPPORTS_BIG_ENDIAN
 	select SYS_SUPPORTS_LITTLE_ENDIAN
 	select SYS_SUPPORTS_HIGHMEM
@@ -1077,7 +1075,7 @@ config MIPS_CLOCK_VSYSCALL
 	def_bool CSRC_R4K || CLKSRC_MIPS_GIC
 
 config GPIO_TXX9
-	select ARCH_REQUIRE_GPIOLIB
+	select GPIOLIB
 	bool
 
 config FW_CFE
@@ -1342,7 +1340,7 @@ config CPU_LOONGSON3
 	select CPU_SUPPORTS_HUGEPAGES
 	select WEAK_ORDERING
 	select WEAK_REORDERING_BEYOND_LLSC
-	select ARCH_REQUIRE_GPIOLIB
+	select GPIOLIB
 	help
 		The Loongson 3 processor implements the MIPS64R2 instruction
 		set with many extensions.
@@ -1362,7 +1360,7 @@ config CPU_LOONGSON2F
 	bool "Loongson 2F"
 	depends on SYS_HAS_CPU_LOONGSON2F
 	select CPU_LOONGSON2
-	select ARCH_REQUIRE_GPIOLIB
+	select GPIOLIB
 	help
 	  The Loongson 2F processor implements the MIPS III instruction set
 	  with many extensions.