diff options
Diffstat (limited to 'target/linux/lantiq/patches-3.2/0001-GPIO-add-bindings-for-managed-devices.patch')
| -rw-r--r-- | target/linux/lantiq/patches-3.2/0001-GPIO-add-bindings-for-managed-devices.patch | 134 |
1 files changed, 0 insertions, 134 deletions
diff --git a/target/linux/lantiq/patches-3.2/0001-GPIO-add-bindings-for-managed-devices.patch b/target/linux/lantiq/patches-3.2/0001-GPIO-add-bindings-for-managed-devices.patch deleted file mode 100644 index 9064dc9a9a..0000000000 --- a/target/linux/lantiq/patches-3.2/0001-GPIO-add-bindings-for-managed-devices.patch +++ /dev/null @@ -1,134 +0,0 @@ -From 8817c547f92016b9276ffec88b708c2c16d1f0f1 Mon Sep 17 00:00:00 2001 -From: John Crispin <blogic@openwrt.org> -Date: Thu, 8 Mar 2012 13:23:53 +0100 -Subject: [PATCH 01/73] GPIO: add bindings for managed devices - -This patch adds 2 functions that allow managed devices to request GPIOs. -These GPIOs will then be managed by drivers/base/devres.c. - -Signed-off-by: John Crispin <blogic@openwrt.org> -Signed-off-by: Grant Likely <grant.likely@secretlab.ca> ---- - drivers/gpio/Makefile | 2 +- - drivers/gpio/devres.c | 90 ++++++++++++++++++++++++++++++++++++++++++++ - include/asm-generic/gpio.h | 4 ++ - 3 files changed, 95 insertions(+), 1 deletions(-) - create mode 100644 drivers/gpio/devres.c - ---- a/drivers/gpio/Makefile -+++ b/drivers/gpio/Makefile -@@ -2,7 +2,7 @@ - - ccflags-$(CONFIG_DEBUG_GPIO) += -DDEBUG - --obj-$(CONFIG_GPIOLIB) += gpiolib.o -+obj-$(CONFIG_GPIOLIB) += gpiolib.o devres.o - - # Device drivers. Generally keep list sorted alphabetically - obj-$(CONFIG_GPIO_GENERIC) += gpio-generic.o ---- /dev/null -+++ b/drivers/gpio/devres.c -@@ -0,0 +1,90 @@ -+/* -+ * drivers/gpio/devres.c - managed gpio resources -+ * -+ * This program is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License version 2 -+ * as published by the Free Software Foundation. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA -+ * -+ * This file is based on kernel/irq/devres.c -+ * -+ * Copyright (c) 2011 John Crispin <blogic@openwrt.org> -+ */ -+ -+#include <linux/module.h> -+#include <linux/gpio.h> -+#include <linux/device.h> -+#include <linux/gfp.h> -+ -+static void devm_gpio_release(struct device *dev, void *res) -+{ -+ unsigned *gpio = res; -+ -+ gpio_free(*gpio); -+} -+ -+static int devm_gpio_match(struct device *dev, void *res, void *data) -+{ -+ unsigned *this = res, *gpio = data; -+ -+ return *this == *gpio; -+} -+ -+/** -+ * devm_gpio_request - request a gpio for a managed device -+ * @dev: device to request the gpio for -+ * @gpio: gpio to allocate -+ * @label: the name of the requested gpio -+ * -+ * Except for the extra @dev argument, this function takes the -+ * same arguments and performs the same function as -+ * gpio_request(). GPIOs requested with this function will be -+ * automatically freed on driver detach. -+ * -+ * If an GPIO allocated with this function needs to be freed -+ * separately, devm_gpio_free() must be used. -+ */ -+ -+int devm_gpio_request(struct device *dev, unsigned gpio, const char *label) -+{ -+ unsigned *dr; -+ int rc; -+ -+ dr = devres_alloc(devm_gpio_release, sizeof(unsigned), GFP_KERNEL); -+ if (!dr) -+ return -ENOMEM; -+ -+ rc = gpio_request(gpio, label); -+ if (rc) { -+ devres_free(dr); -+ return rc; -+ } -+ -+ *dr = gpio; -+ devres_add(dev, dr); -+ -+ return 0; -+} -+EXPORT_SYMBOL(devm_gpio_request); -+ -+/** -+ * devm_gpio_free - free an interrupt -+ * @dev: device to free gpio for -+ * @gpio: gpio to free -+ * -+ * Except for the extra @dev argument, this function takes the -+ * same arguments and performs the same function as gpio_free(). -+ * This function instead of gpio_free() should be used to manually -+ * free GPIOs allocated with devm_gpio_request(). -+ */ -+void devm_gpio_free(struct device *dev, unsigned int gpio) -+{ -+ -+ WARN_ON(devres_destroy(dev, devm_gpio_release, devm_gpio_match, -+ &gpio)); -+ gpio_free(gpio); -+} -+EXPORT_SYMBOL(devm_gpio_free); ---- a/include/asm-generic/gpio.h -+++ b/include/asm-generic/gpio.h -@@ -175,6 +175,10 @@ extern int gpio_request_one(unsigned gpi - extern int gpio_request_array(const struct gpio *array, size_t num); - extern void gpio_free_array(const struct gpio *array, size_t num); - -+/* bindings for managed devices that want to request gpios */ -+int devm_gpio_request(struct device *dev, unsigned gpio, const char *label); -+void devm_gpio_free(struct device *dev, unsigned int gpio); -+ - #ifdef CONFIG_GPIO_SYSFS - - /* |