[PATCH] rb532: provide GPIO_BUILTIN_NR and irq_to_gpio/gpio_to_irq

[PATCH] rb532: provide GPIO_BUILTIN_NR and irq_to_gpio/gpio_to_irq

[Florian Fainelli]

This patchs defines the number of built-in the GPIOs present
on the SoC as Documentation/gpio.txt recommends to do.
Define irq_to_gpio/gpio_to_irq to return the right values so that
it fixes a compilation error on drivers/gpio/gpiolib.c
when enabling debugfs.

Signed-off-by: Florian Fainelli <florian@openwrt.org>
---
diff --git a/include/asm-mips/mach-rc32434/gpio.h b/include/asm-mips/mach-rc32434/gpio.h
index 77ac353..ff40eab 100644
--- a/include/asm-mips/mach-rc32434/gpio.h
+++ b/include/asm-mips/mach-rc32434/gpio.h
@@ -14,16 +14,16 @@
 #define _RC32434_GPIO_H_
 
 #include <linux/types.h>
+#include <asm-generic/gpio.h>
 
-#define gpio_get_value __gpio_get_value
-#define gpio_set_value __gpio_set_value
-
-#define gpio_cansleep __gpio_cansleep
+#define NR_BUILTIN_GPIO		32
 
-#define gpio_to_irq(gpio)	IRQ_GPIO(gpio)
-#define irq_to_gpio(irq)	IRQ_TO_GPIO(irq)
+#define gpio_get_value	__gpio_get_value
+#define gpio_set_value	__gpio_set_value
+#define gpio_cansleep	__gpio_cansleep
 
-#include <asm-generic/gpio.h>
+#define gpio_to_irq(gpio)	(8 + 4 * 32 + gpio)
+#define irq_to_gpio(irq)	(irq - (8 + 4 * 32))
 
 struct rb532_gpio_reg {
 	u32   gpiofunc;   /* GPIO Function Register