diff options
| -rw-r--r-- | target/linux/ramips/patches-3.8/0209-owrt-GPIO-add-gpio_export_with_name.patch | 89 |
1 files changed, 63 insertions, 26 deletions
diff --git a/target/linux/ramips/patches-3.8/0209-owrt-GPIO-add-gpio_export_with_name.patch b/target/linux/ramips/patches-3.8/0209-owrt-GPIO-add-gpio_export_with_name.patch index efbd0858d6..80d9402b30 100644 --- a/target/linux/ramips/patches-3.8/0209-owrt-GPIO-add-gpio_export_with_name.patch +++ b/target/linux/ramips/patches-3.8/0209-owrt-GPIO-add-gpio_export_with_name.patch @@ -14,9 +14,11 @@ Signed-off-by: John Crispin <blogic@openwrt.org> include/linux/gpio.h | 23 ++++++++- 5 files changed, 160 insertions(+), 8 deletions(-) ---- a/Documentation/devicetree/bindings/gpio/gpio.txt -+++ b/Documentation/devicetree/bindings/gpio/gpio.txt -@@ -112,3 +112,63 @@ where, +Index: linux-3.8.11/Documentation/devicetree/bindings/gpio/gpio.txt +=================================================================== +--- linux-3.8.11.orig/Documentation/devicetree/bindings/gpio/gpio.txt 2013-05-01 18:56:10.000000000 +0200 ++++ linux-3.8.11/Documentation/devicetree/bindings/gpio/gpio.txt 2013-05-06 12:43:38.252652605 +0200 +@@ -112,3 +112,63 @@ The pinctrl node must have "#gpio-range-cells" property to show number of arguments to pass with phandle from gpio controllers node. @@ -80,8 +82,10 @@ Signed-off-by: John Crispin <blogic@openwrt.org> + gpio-export,output = <1>; + }; +}; ---- a/drivers/gpio/gpiolib-of.c -+++ b/drivers/gpio/gpiolib-of.c +Index: linux-3.8.11/drivers/gpio/gpiolib-of.c +=================================================================== +--- linux-3.8.11.orig/drivers/gpio/gpiolib-of.c 2013-05-01 18:56:10.000000000 +0200 ++++ linux-3.8.11/drivers/gpio/gpiolib-of.c 2013-05-06 13:35:56.452788709 +0200 @@ -21,6 +21,8 @@ #include <linux/of_gpio.h> #include <linux/pinctrl/pinctrl.h> @@ -91,7 +95,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org> /* Private data structure for of_gpiochip_find_and_xlate */ struct gg_data { -@@ -288,3 +290,62 @@ void of_gpiochip_remove(struct gpio_chip +@@ -288,3 +290,69 @@ if (chip->of_node) of_node_put(chip->of_node); } @@ -121,16 +125,23 @@ Signed-off-by: John Crispin <blogic@openwrt.org> + max_gpio = of_gpio_count(cnp); + + for (i = 0; i < max_gpio; i++) { -+ gpio = of_get_gpio(cnp, i); -+ if (devm_gpio_request(&pdev->dev, gpio, name ? name : of_node_full_name(np))) -+ continue; ++ unsigned flags = 0; ++ enum of_gpio_flags of_flags; ++ ++ gpio = of_get_gpio_flags(cnp, i, &of_flags); ++ ++ if (of_flags == OF_GPIO_ACTIVE_LOW) ++ flags |= GPIOF_ACTIVE_LOW; + + if (!of_property_read_u32(cnp, "gpio-export,output", &val)) -+ gpio_direction_output(gpio, val); ++ flags |= val ? GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW; + else -+ gpio_direction_input(gpio); ++ flags |= GPIOF_IN; + -+ dmc = of_property_read_bool(np, "gpio-export,direction_may_change"); ++ if (devm_gpio_request_one(&pdev->dev, gpio, flags, name ? name : of_node_full_name(np))) ++ continue; ++ ++ dmc = of_property_read_bool(cnp, "gpio-export,direction_may_change"); + gpio_export_with_name(gpio, dmc, name); + nb++; + } @@ -154,9 +165,11 @@ Signed-off-by: John Crispin <blogic@openwrt.org> + return platform_driver_probe(&gpio_export_driver, of_gpio_export_probe); +} +device_initcall(of_gpio_export_init); ---- a/drivers/gpio/gpiolib.c -+++ b/drivers/gpio/gpiolib.c -@@ -714,9 +714,10 @@ static struct class gpio_class = { +Index: linux-3.8.11/drivers/gpio/gpiolib.c +=================================================================== +--- linux-3.8.11.orig/drivers/gpio/gpiolib.c 2013-05-01 18:56:10.000000000 +0200 ++++ linux-3.8.11/drivers/gpio/gpiolib.c 2013-05-06 13:31:35.060777376 +0200 +@@ -714,9 +714,10 @@ /** @@ -168,7 +181,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org> * Context: arch_initcall or later * * When drivers want to make a GPIO accessible to userspace after they -@@ -728,7 +729,7 @@ static struct class gpio_class = { +@@ -728,7 +729,7 @@ * * Returns zero on success, else an error. */ @@ -177,7 +190,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org> { unsigned long flags; struct gpio_desc *desc; -@@ -762,6 +763,8 @@ int gpio_export(unsigned gpio, bool dire +@@ -762,6 +763,8 @@ goto fail_unlock; } @@ -186,7 +199,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org> if (!desc->chip->direction_input || !desc->chip->direction_output) direction_may_change = false; spin_unlock_irqrestore(&gpio_lock, flags); -@@ -804,7 +807,7 @@ fail_unlock: +@@ -804,7 +807,7 @@ pr_debug("%s: gpio%d status %d\n", __func__, gpio, status); return status; } @@ -195,9 +208,21 @@ Signed-off-by: John Crispin <blogic@openwrt.org> static int match_export(struct device *dev, void *data) { ---- a/include/asm-generic/gpio.h -+++ b/include/asm-generic/gpio.h -@@ -204,7 +204,8 @@ void devm_gpio_free(struct device *dev, +@@ -1418,6 +1421,9 @@ + if (flags & GPIOF_OPEN_SOURCE) + set_bit(FLAG_OPEN_SOURCE, &gpio_desc[gpio].flags); + ++ if (flags & GPIOF_ACTIVE_LOW) ++ set_bit(FLAG_ACTIVE_LOW, &gpio_desc[gpio].flags); ++ + if (flags & GPIOF_DIR_IN) + err = gpio_direction_input(gpio); + else +Index: linux-3.8.11/include/asm-generic/gpio.h +=================================================================== +--- linux-3.8.11.orig/include/asm-generic/gpio.h 2013-05-01 18:56:10.000000000 +0200 ++++ linux-3.8.11/include/asm-generic/gpio.h 2013-05-06 12:43:38.252652605 +0200 +@@ -204,7 +204,8 @@ * A sysfs interface can be exported by individual drivers if they want, * but more typically is configured entirely from userspace. */ @@ -207,7 +232,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org> extern int gpio_export_link(struct device *dev, const char *name, unsigned gpio); extern int gpio_sysfs_set_active_low(unsigned gpio, int value); -@@ -249,7 +250,8 @@ struct device; +@@ -249,7 +250,8 @@ /* sysfs support is only available with gpiolib, where it's optional */ @@ -217,9 +242,21 @@ Signed-off-by: John Crispin <blogic@openwrt.org> { return -ENOSYS; } ---- a/include/linux/gpio.h -+++ b/include/linux/gpio.h -@@ -189,7 +189,8 @@ static inline void gpio_set_value_cansle +Index: linux-3.8.11/include/linux/gpio.h +=================================================================== +--- linux-3.8.11.orig/include/linux/gpio.h 2013-05-01 18:56:10.000000000 +0200 ++++ linux-3.8.11/include/linux/gpio.h 2013-05-06 13:32:59.796781050 +0200 +@@ -27,6 +27,9 @@ + #define GPIOF_EXPORT_DIR_FIXED (GPIOF_EXPORT) + #define GPIOF_EXPORT_DIR_CHANGEABLE (GPIOF_EXPORT | GPIOF_EXPORT_CHANGEABLE) + ++#define GPIOF_ACTIVE_LOW (1 << 6) ++ ++ + /** + * struct gpio - a structure describing a GPIO with configuration + * @gpio: the GPIO number +@@ -189,7 +192,8 @@ WARN_ON(1); } @@ -229,7 +266,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org> { /* GPIO can never have been requested or set as {in,out}put */ WARN_ON(1); -@@ -248,4 +249,24 @@ gpiochip_remove_pin_ranges(struct gpio_c +@@ -248,4 +252,24 @@ #endif /* ! CONFIG_GENERIC_GPIO */ |