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jz4740: GPIO: Add functions to put function pins to high-z and to restore their

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function.

We want to put function pins to high-z to decrease power leakage during suspend.
This commit is contained in:
Lars-Peter Clausen
2009-12-02 04:12:39 +01:00
parent aa7c40a8c1
commit 3ae48ccb8c
3 changed files with 36 additions and 13 deletions
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25
target/linux/xburst/files-2.6.31/arch/mips/include/asm/mach-jz4740/gpio.h
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@@ -19,13 +19,12 @@
#include <linux/types.h>
enum jz_gpio_function {
JZ_GPIO_FUNC_NONE,
JZ_GPIO_FUNC1,
JZ_GPIO_FUNC2,
JZ_GPIO_FUNC3,
JZ_GPIO_FUNC_NONE,
JZ_GPIO_FUNC1,
JZ_GPIO_FUNC2,
JZ_GPIO_FUNC3,
};
/*
Usually a driver for a SoC component has to request several gpio pins and
configure them as funcion pins.
@@ -39,13 +38,13 @@ enum jz_gpio_function {
inside the probe function:
ret = jz_gpio_bulk_request(i2c_pins, ARRAY_SIZE(i2c_pins));
if (ret) {
ret = jz_gpio_bulk_request(i2c_pins, ARRAY_SIZE(i2c_pins));
if (ret) {
...
inside the remove function:
jz_gpio_bulk_free(i2c_pins, ARRAY_SIZE(i2c_pins));
jz_gpio_bulk_free(i2c_pins, ARRAY_SIZE(i2c_pins));
*/
@@ -56,13 +55,15 @@ struct jz_gpio_bulk_request {
};
#define JZ_GPIO_BULK_PIN(pin) { \
.gpio = JZ_GPIO_ ## pin, \
.name = #pin, \
.function = JZ_GPIO_FUNC_ ## pin \
.gpio = JZ_GPIO_ ## pin, \
.name = #pin, \
.function = JZ_GPIO_FUNC_ ## pin \
}
int jz_gpio_bulk_request(const struct jz_gpio_bulk_request *request, size_t num);
void jz_gpio_bulk_free(const struct jz_gpio_bulk_request *request, size_t num);
void jz_gpio_bulk_suspend(const struct jz_gpio_bulk_request *request, size_t num);
void jz_gpio_bulk_resume(const struct jz_gpio_bulk_request *request, size_t num);
void jz_gpio_enable_pullup(unsigned gpio);
void jz_gpio_disable_pullup(unsigned gpio);
int jz_gpio_set_function(int gpio, enum jz_gpio_function function);
@@ -192,7 +193,7 @@ int jz_gpio_set_function(int gpio, enum jz_gpio_function function);
#define JZ_GPIO_FUNC_MEM_ADDR14 JZ_GPIO_FUNC1
#define JZ_GPIO_FUNC_MEM_ADDR15 JZ_GPIO_FUNC1
#define JZ_GPIO_FUNC_MEM_ADDR16 JZ_GPIO_FUNC1
#define JZ_GPIO_FUNC_MEM_CLS JZ_GPIO_FUNC1
#define JZ_GPIO_FUNC_MEM_CLS JZ_GPIO_FUNC1
#define JZ_GPIO_FUNC_MEM_SPL JZ_GPIO_FUNC1
#define JZ_GPIO_FUNC_MEM_DCS JZ_GPIO_FUNC1
#define JZ_GPIO_FUNC_MEM_RAS JZ_GPIO_FUNC1