diff options
Diffstat (limited to 'target/linux/ixp4xx/patches-2.6.36/402-ixp4xx_gpiolib.patch')
| -rw-r--r-- | target/linux/ixp4xx/patches-2.6.36/402-ixp4xx_gpiolib.patch | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/target/linux/ixp4xx/patches-2.6.36/402-ixp4xx_gpiolib.patch b/target/linux/ixp4xx/patches-2.6.36/402-ixp4xx_gpiolib.patch new file mode 100644 index 0000000000..5225507137 --- /dev/null +++ b/target/linux/ixp4xx/patches-2.6.36/402-ixp4xx_gpiolib.patch @@ -0,0 +1,136 @@ +--- a/arch/arm/mach-ixp4xx/common.c ++++ b/arch/arm/mach-ixp4xx/common.c +@@ -35,6 +35,7 @@ + #include <asm/pgtable.h> + #include <asm/page.h> + #include <asm/irq.h> ++#include <asm/gpio.h> + + #include <asm/mach/map.h> + #include <asm/mach/irq.h> +@@ -374,12 +375,50 @@ static struct platform_device *ixp46x_de + unsigned long ixp4xx_exp_bus_size; + EXPORT_SYMBOL(ixp4xx_exp_bus_size); + ++static int ixp4xx_gpio_direction_input(struct gpio_chip *chip, unsigned gpio) ++{ ++ gpio_line_config(gpio, IXP4XX_GPIO_IN); ++ return 0; ++} ++ ++static int ixp4xx_gpio_direction_output(struct gpio_chip *chip, unsigned gpio, int level) ++{ ++ gpio_line_set(gpio, level); ++ gpio_line_config(gpio, IXP4XX_GPIO_OUT); ++ return 0; ++} ++ ++static int ixp4xx_gpio_get_value(struct gpio_chip *chip, unsigned gpio) ++{ ++ int value; ++ ++ gpio_line_get(gpio, &value); ++ return value; ++} ++ ++static void ixp4xx_gpio_set_value(struct gpio_chip *chip, unsigned gpio, int value) ++{ ++ gpio_line_set(gpio, value); ++} ++ ++static struct gpio_chip ixp4xx_gpio_chip = { ++ .label = "IXP4XX_GPIO_CHIP", ++ .direction_input = ixp4xx_gpio_direction_input, ++ .direction_output = ixp4xx_gpio_direction_output, ++ .get = ixp4xx_gpio_get_value, ++ .set = ixp4xx_gpio_set_value, ++ .base = 0, ++ .ngpio = 16, ++}; ++ + void __init ixp4xx_sys_init(void) + { + ixp4xx_exp_bus_size = SZ_16M; + + platform_add_devices(ixp4xx_devices, ARRAY_SIZE(ixp4xx_devices)); + ++ gpiochip_add(&ixp4xx_gpio_chip); ++ + if (cpu_is_ixp46x()) { + int region; + +--- a/arch/arm/Kconfig ++++ b/arch/arm/Kconfig +@@ -435,6 +435,7 @@ config ARCH_IXP4XX + select CPU_XSCALE + select GENERIC_GPIO + select GENERIC_CLOCKEVENTS ++ select ARCH_REQUIRE_GPIOLIB + help + Support for Intel's IXP4XX (XScale) family of processors. + +--- a/arch/arm/mach-ixp4xx/include/mach/gpio.h ++++ b/arch/arm/mach-ixp4xx/include/mach/gpio.h +@@ -27,47 +27,31 @@ + + #include <linux/kernel.h> + #include <mach/hardware.h> ++#include <asm-generic/gpio.h> /* cansleep wrappers */ + +-static inline int gpio_request(unsigned gpio, const char *label) +-{ +- return 0; +-} +- +-static inline void gpio_free(unsigned gpio) +-{ +- might_sleep(); +- +- return; +-} +- +-static inline int gpio_direction_input(unsigned gpio) +-{ +- gpio_line_config(gpio, IXP4XX_GPIO_IN); +- return 0; +-} +- +-static inline int gpio_direction_output(unsigned gpio, int level) +-{ +- gpio_line_set(gpio, level); +- gpio_line_config(gpio, IXP4XX_GPIO_OUT); +- return 0; +-} ++#define NR_BUILTIN_GPIO 16 + + static inline int gpio_get_value(unsigned gpio) + { +- int value; +- +- gpio_line_get(gpio, &value); +- +- return value; ++ if (gpio < NR_BUILTIN_GPIO) ++ { ++ int value; ++ gpio_line_get(gpio, &value); ++ return value; ++ } ++ else ++ return __gpio_get_value(gpio); + } + + static inline void gpio_set_value(unsigned gpio, int value) + { +- gpio_line_set(gpio, value); ++ if (gpio < NR_BUILTIN_GPIO) ++ gpio_line_set(gpio, value); ++ else ++ __gpio_set_value(gpio, value); + } + +-#include <asm-generic/gpio.h> /* cansleep wrappers */ ++#define gpio_cansleep __gpio_cansleep + + extern int gpio_to_irq(int gpio); + extern int irq_to_gpio(unsigned int irq); |