[ARM] pxa: move common GPIO handling code into plat-pxa

1. add common GPIO handling code into [arch/arm/plat-pxa]

2. common code in <mach/gpio.h> moved into <plat/gpio.h>, new processors
   should implement its own <mach/gpio.h>, provide the following required
   definitions and '#include <plat/gpio.h>' in the end:

   - GPIO_REGS_VIRT for mapped virtual address of the GPIO registers'
     physical I/O memory

   - macros of GPLR(), GPSR(), GPDR() for constant optimization for
     functions gpio_{set,get}_value() (so that bit-bang code can still
     have tolerable performance)

   - NR_BUILTIN_GPIO for the number of onchip GPIO

   - definitions of __gpio_is_inverted() and __gpio_is_occupied(), they
     can be either macros or inlined functions

Signed-off-by: Eric Miao <eric.miao@marvell.com>

1 files changed, 1 insertions, 31 deletions

diff --git a/arch/arm/mach-pxa/include/mach/gpio.h b/arch/arm/mach-pxa/include/mach/gpio.h
index c72c89a..b024a8b 100644
--- a/arch/arm/mach-pxa/include/mach/gpio.h
+++ b/arch/arm/mach-pxa/include/mach/gpio.h
@@ -99,40 +99,12 @@
 #define GAFR(x)		GPIO_REG(0x54 + (((x) & 0x70) >> 2))
 
 
-/* NOTE: some PXAs have fewer on-chip GPIOs (like PXA255, with 85).
- * Those cases currently cause holes in the GPIO number space, the
- * actual number of the last GPIO is recorded by 'pxa_last_gpio'.
- */
-extern int pxa_last_gpio;
-
 #define NR_BUILTIN_GPIO 128
 
-static inline int gpio_get_value(unsigned gpio)
-{
-	if (__builtin_constant_p(gpio) && (gpio < NR_BUILTIN_GPIO))
-		return GPLR(gpio) & GPIO_bit(gpio);
-	else
-		return __gpio_get_value(gpio);
-}
-
-static inline void gpio_set_value(unsigned gpio, int value)
-{
-	if (__builtin_constant_p(gpio) && (gpio < NR_BUILTIN_GPIO)) {
-		if (value)
-			GPSR(gpio) = GPIO_bit(gpio);
-		else
-			GPCR(gpio) = GPIO_bit(gpio);
-	} else {
-		__gpio_set_value(gpio, value);
-	}
-}
-
-#define gpio_cansleep		__gpio_cansleep
 #define gpio_to_bank(gpio)	((gpio) >> 5)
 #define gpio_to_irq(gpio)	IRQ_GPIO(gpio)
 #define irq_to_gpio(irq)	IRQ_TO_GPIO(irq)
 
-
 #ifdef CONFIG_CPU_PXA26x
 /* GPIO86/87/88/89 on PXA26x have their direction bits in GPDR2 inverted,
  * as well as their Alternate Function value being '1' for GPIO in GAFRx.
@@ -165,7 +137,5 @@ static inline int __gpio_is_occupied(unsigned gpio)
 		return GPDR(gpio) & GPIO_bit(gpio);
 }
 
-typedef int (*set_wake_t)(unsigned int irq, unsigned int on);
-
-extern void pxa_init_gpio(int mux_irq, int start, int end, set_wake_t fn);
+#include <plat/gpio.h>
 #endif