gpio: Move GE GPIO driver to reside within GPIO subsystem

The GE GPIO driver provides basic support (set direction, read/write state)
for the GPIO provided on some GE single board computers. This patch moves
the driver from the 86xx specific platform directrory to the GPIO subsystem
so that it can be used on non-86xx boards.

Signed-off-by: Martyn Welch <martyn.welch@ge.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

arch/powerpc/configs/86xx/gef_ppc9a_defconfig

@@ -131,6 +131,7 @@ CONFIG_I2C=y
 CONFIG_I2C_CHARDEV=y
 CONFIG_I2C_MPC=y
 CONFIG_GPIO_SYSFS=y
+CONFIG_GPIO_GE_FPGA=y
 CONFIG_SENSORS_LM90=y
 CONFIG_SENSORS_LM92=y
 CONFIG_WATCHDOG=y

arch/powerpc/configs/86xx/gef_sbc310_defconfig

@@ -132,6 +132,7 @@ CONFIG_I2C=y
 CONFIG_I2C_CHARDEV=y
 CONFIG_I2C_MPC=y
 CONFIG_GPIO_SYSFS=y
+CONFIG_GPIO_GE_FPGA=y
 CONFIG_SENSORS_LM90=y
 CONFIG_SENSORS_LM92=y
 CONFIG_WATCHDOG=y

arch/powerpc/configs/86xx/gef_sbc610_defconfig

@@ -183,6 +183,8 @@ CONFIG_NVRAM=y
 CONFIG_I2C=y
 CONFIG_I2C_CHARDEV=y
 CONFIG_I2C_MPC=y
+CONFIG_GPIO_SYSFS=y
+CONFIG_GPIO_GE_FPGA=y
 CONFIG_SENSORS_LM90=y
 CONFIG_SENSORS_LM92=y
 CONFIG_WATCHDOG=y

arch/powerpc/platforms/86xx/Makefile

@@ -7,8 +7,7 @@ obj-$(CONFIG_SMP)		+= mpc86xx_smp.o
 obj-$(CONFIG_MPC8641_HPCN)	+= mpc86xx_hpcn.o
 obj-$(CONFIG_SBC8641D)		+= sbc8641d.o
 obj-$(CONFIG_MPC8610_HPCD)	+= mpc8610_hpcd.o
-gef-gpio-$(CONFIG_GPIOLIB)	+= gef_gpio.o
-obj-$(CONFIG_GE_FPGA)	+= gef_pic.o $(gef-gpio-y)
+obj-$(CONFIG_GE_FPGA)		+= gef_pic.o
 obj-$(CONFIG_GEF_SBC610)	+= gef_sbc610.o
 obj-$(CONFIG_GEF_SBC310)	+= gef_sbc310.o
 obj-$(CONFIG_GEF_PPC9A)		+= gef_ppc9a.o

drivers/gpio/Kconfig

@@ -190,6 +190,17 @@ config GPIO_VX855
 	  additional drivers must be enabled in order to use the
 	  functionality of the device.
 
+config GPIO_GE_FPGA
+	bool "GE FPGA based GPIO"
+	depends on GE_FPGA
+	help
+	  Support for common GPIO functionality provided on some GE Single Board
+	  Computers.
+
+	  This driver provides basic support (configure as input or output, read
+	  and write pin state) for GPIO implemented in a number of GE single
+	  board computers.
+
 comment "I2C GPIO expanders:"
 
 config GPIO_MAX7300

drivers/gpio/Makefile

@@ -16,6 +16,7 @@ obj-$(CONFIG_GPIO_CS5535)	+= gpio-cs5535.o
 obj-$(CONFIG_GPIO_DA9052)	+= gpio-da9052.o
 obj-$(CONFIG_ARCH_DAVINCI)	+= gpio-davinci.o
 obj-$(CONFIG_GPIO_EP93XX)	+= gpio-ep93xx.o
+obj-$(CONFIG_GPIO_GE_FPGA)	+= gpio-ge.o
 obj-$(CONFIG_GPIO_IT8761E)	+= gpio-it8761e.o
 obj-$(CONFIG_GPIO_JANZ_TTL)	+= gpio-janz-ttl.o
 obj-$(CONFIG_ARCH_KS8695)	+= gpio-ks8695.o

drivers/gpio/gpio-ge.c

@@ -14,7 +14,7 @@
  *
  * Configuration of output modes (totem-pole/open-drain)
  * Interrupt configuration - interrupts are always generated the FPGA relies on
- * 	the I/O interrupt controllers mask to stop them propergating
+ * the I/O interrupt controllers mask to stop them propergating
  */
 
 #include <linux/kernel.h>