[ARM] pxa: add GPIO support for pxa168

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

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 5385d8743c6aea221bd6b4c03cbce2b28c7eded3..daf35d7782080fddc42dac9724e63ff7b1bbda46 100644 (file)
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -490,6 +490,8 @@ config ARCH_PXA
 config ARCH_MMP
        bool "Marvell PXA168"
        depends on MMU
+       select GENERIC_GPIO
+       select ARCH_REQUIRE_GPIOLIB
        select HAVE_CLK
        select COMMON_CLKDEV
        select GENERIC_TIME

diff --git a/arch/arm/mach-mmp/include/mach/gpio.h b/arch/arm/mach-mmp/include/mach/gpio.h
new file mode 100644 (file)
index 0000000..ab26d13
--- /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 */

diff --git a/arch/arm/mach-mmp/pxa168.c b/arch/arm/mach-mmp/pxa168.c
index 1935c754511756ee25a6b266c585f68224dbf265..1774682e988e70d881a339335e58eafa67b1a5fc 100644 (file)
--- a/arch/arm/mach-mmp/pxa168.c
+++ b/arch/arm/mach-mmp/pxa168.c
@@ -12,6 +12,7 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/list.h>
+#include <linux/io.h>
 #include <linux/clk.h>
 
 #include <asm/mach/time.h>
@@ -19,15 +20,33 @@
 #include <mach/cputype.h>
 #include <mach/regs-apbc.h>
 #include <mach/irqs.h>
+#include <mach/gpio.h>
 #include <mach/dma.h>
 #include <mach/devices.h>
 
 #include "common.h"
 #include "clock.h"
 
+#define APMASK(i)      (GPIO_REGS_VIRT + BANK_OFF(i) + 0x09c)
+
+static void __init pxa168_init_gpio(void)
+{
+       int i;
+
+       /* enable GPIO clock */
+       __raw_writel(APBC_APBCLK | APBC_FNCLK, APBC_PXA168_GPIO);
+
+       /* unmask GPIO edge detection for all 4 banks - APMASKx */
+       for (i = 0; i < 4; i++)
+               __raw_writel(0xffffffff, APMASK(i));
+
+       pxa_init_gpio(IRQ_PXA168_GPIOX, 0, 127, NULL);
+}
+
 void __init pxa168_init_irq(void)
 {
        icu_init_irq();
+       pxa168_init_gpio();
 }
 
 /* APB peripheral clocks */