[ARM] pxa: add GPIO support for pxa168

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

1 files changed, 36 insertions, 0 deletions

diff --git a/arch/arm/mach-mmp/include/mach/gpio.h b/arch/arm/mach-mmp/include/mach/gpio.h
new file mode 100644
index 000000000000..ab26d13295c4
--- /dev/null
+++ b/arch/arm/mach-mmp/include/mach/gpio.h
@@ -0,0 +1,36 @@
+#ifndef __ASM_MACH_GPIO_H
+#define __ASM_MACH_GPIO_H
+
+#include <mach/addr-map.h>
+#include <mach/irqs.h>
+#include <asm-generic/gpio.h>
+
+#define GPIO_REGS_VIRT  (APB_VIRT_BASE + 0x19000)
+
+#define BANK_OFF(n)     (((n) < 3) ? (n) << 2 : 0x100 + (((n) - 3) << 2))
+#define GPIO_REG(x)     (*((volatile u32 *)(GPIO_REGS_VIRT + (x))))
+
+#define NR_BUILTIN_GPIO (128)
+
+#define gpio_to_bank(gpio)      ((gpio) >> 5)
+#define gpio_to_irq(gpio)       (IRQ_GPIO_START + (gpio))
+#define irq_to_gpio(irq)        ((irq) - IRQ_GPIO_START)
+
+
+#define __gpio_is_inverted(gpio)        (0)
+#define __gpio_is_occupied(gpio)        (0)
+
+/* NOTE: these macros are defined here to make optimization of
+ * gpio_{get,set}_value() to work when 'gpio' is a constant.
+ * Usage of these macros otherwise is no longer recommended,
+ * use generic GPIO API whenever possible.
+ */
+#define GPIO_bit(gpio)  (1 << ((gpio) & 0x1f))
+
+#define GPLR(x)         GPIO_REG(BANK_OFF(gpio_to_bank(x)) + 0x00)
+#define GPDR(x)         GPIO_REG(BANK_OFF(gpio_to_bank(x)) + 0x0c)
+#define GPSR(x)         GPIO_REG(BANK_OFF(gpio_to_bank(x)) + 0x18)
+#define GPCR(x)         GPIO_REG(BANK_OFF(gpio_to_bank(x)) + 0x24)
+
+#include <plat/gpio.h>
+#endif /* __ASM_MACH_GPIO_H */