diff options
| author | Eric Miao <eric.miao@marvell.com> | 2009-01-20 14:38:24 +0800 |
|---|---|---|
| committer | Eric Miao <eric.miao@marvell.com> | 2009-03-23 10:11:34 +0800 |
| commit | e2bb6650ef94c64723e2dd35ab92410b9477bc64 (patch) | |
| tree | 14dc515236c9a27d39b26005c66404dd08c8570f /arch/arm | |
| parent | 40305a583a3e080a8d1aa126fa810480ec8cbabd (diff) | |
[ARM] pxa: add GPIO support for pxa168
Signed-off-by: Eric Miao <eric.miao@marvell.com>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/Kconfig | 2 | ||||
| -rw-r--r-- | arch/arm/mach-mmp/include/mach/gpio.h | 36 | ||||
| -rw-r--r-- | arch/arm/mach-mmp/pxa168.c | 19 |
3 files changed, 57 insertions, 0 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 5385d8743c6..daf35d77820 100644 --- 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 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 */ |