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authorEric Miao <eric.miao@marvell.com>2009-01-20 14:38:24 +0800
committerEric Miao <eric.miao@marvell.com>2009-03-23 10:11:34 +0800
commite2bb6650ef94c64723e2dd35ab92410b9477bc64 (patch)
tree14dc515236c9a27d39b26005c66404dd08c8570f /arch/arm/mach-mmp
parent40305a583a3e080a8d1aa126fa810480ec8cbabd (diff)
downloadlinux-2.6.34-ux500-e2bb6650ef94c64723e2dd35ab92410b9477bc64.tar.gz
[ARM] pxa: add GPIO support for pxa168
Signed-off-by: Eric Miao <eric.miao@marvell.com>
Diffstat (limited to 'arch/arm/mach-mmp')
-rw-r--r--arch/arm/mach-mmp/include/mach/gpio.h36
-rw-r--r--arch/arm/mach-mmp/pxa168.c19
2 files changed, 55 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 00000000000..ab26d13295c
--- /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 1935c754511..1774682e988 100644
--- 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 */