MIPS: Move Loongson GPIO driver to drivers/gpio

Move Loongson-2's GPIO driver to drivers/gpio and add Kconfig options.
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Huacai Chen <chenhc@lemote.com>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

arch/mips/configs/lemote2f_defconfig

@@ -171,6 +171,7 @@ CONFIG_SERIAL_8250_FOURPORT=y
 CONFIG_LEGACY_PTY_COUNT=16
 CONFIG_HW_RANDOM=y
 CONFIG_RTC=y
+CONFIG_GPIO_LOONGSON=y
 CONFIG_THERMAL=y
 CONFIG_MEDIA_SUPPORT=m
 CONFIG_VIDEO_DEV=m

arch/mips/loongson/common/Makefile

@@ -4,7 +4,6 @@
 
 obj-y += setup.o init.o cmdline.o env.o time.o reset.o irq.o \
     bonito-irq.o mem.o machtype.o platform.o
-obj-$(CONFIG_GPIOLIB) += gpio.o
 obj-$(CONFIG_PCI) += pci.o
 
 #

drivers/gpio/Kconfig

@@ -508,6 +508,12 @@ config GPIO_GRGPIO
 	  Select this to support Aeroflex Gaisler GRGPIO cores from the GRLIB
 	  VHDL IP core library.
 
+config GPIO_LOONGSON
+	bool "Loongson-2 GPIO support"
+	depends on CPU_LOONGSON2
+	help
+	  driver for GPIO functionality on Loongson-2F processors.
+
 config GPIO_TB10X
 	bool
 	select GENERIC_IRQ_CHIP

drivers/gpio/Makefile

@@ -42,6 +42,7 @@ obj-$(CONFIG_GPIO_JANZ_TTL)	+= gpio-janz-ttl.o
 obj-$(CONFIG_GPIO_KEMPLD)	+= gpio-kempld.o
 obj-$(CONFIG_ARCH_KS8695)	+= gpio-ks8695.o
 obj-$(CONFIG_GPIO_INTEL_MID)	+= gpio-intel-mid.o
+obj-$(CONFIG_GPIO_LOONGSON)	+= gpio-loongson.o
 obj-$(CONFIG_GPIO_LP3943)	+= gpio-lp3943.o
 obj-$(CONFIG_ARCH_LPC32XX)	+= gpio-lpc32xx.o
 obj-$(CONFIG_GPIO_LYNXPOINT)	+= gpio-lynxpoint.o