diff options
Diffstat (limited to 'target/linux/brcm63xx/patches-4.4/000-4.5-30-gpio-add-a-data-pointer-to-gpio_chip.patch')
| -rw-r--r-- | target/linux/brcm63xx/patches-4.4/000-4.5-30-gpio-add-a-data-pointer-to-gpio_chip.patch | 121 |
1 files changed, 0 insertions, 121 deletions
diff --git a/target/linux/brcm63xx/patches-4.4/000-4.5-30-gpio-add-a-data-pointer-to-gpio_chip.patch b/target/linux/brcm63xx/patches-4.4/000-4.5-30-gpio-add-a-data-pointer-to-gpio_chip.patch deleted file mode 100644 index 7a44a7cc65..0000000000 --- a/target/linux/brcm63xx/patches-4.4/000-4.5-30-gpio-add-a-data-pointer-to-gpio_chip.patch +++ /dev/null @@ -1,121 +0,0 @@ -From b08ea35a3296ee25c4cb53a977b752266dafa2c2 Mon Sep 17 00:00:00 2001 -From: Linus Walleij <linus.walleij@linaro.org> -Date: Thu, 3 Dec 2015 15:14:13 +0100 -Subject: [PATCH] gpio: add a data pointer to gpio_chip - -This adds a void * pointer to gpio_chip so that driver can -assign and retrieve some states. This is done to get rid of -container_of() calls for gpio_chips embedded inside state -containers, so we can remove the need to have the gpio_chip -or later (planned) struct gpio_device be dynamically allocated -at registration time, so that its struct device can be properly -reference counted and not bound to its parent device (e.g. -a platform_device) but instead live on after unregistration -if it is opened by e.g. a char device or sysfs. - -The data is added with the new function gpiochip_add_data() -and for compatibility we add static inline wrapper function -gpiochip_add() that will call gpiochip_add_data() with -NULL as argument. The latter will be removed once we have -exorcised gpiochip_add() from the kernel. - -gpiochip_get_data() is added as a static inline accessor -for drivers to quickly get their data out. - -Signed-off-by: Linus Walleij <linus.walleij@linaro.org> ---- - drivers/gpio/gpiolib.c | 10 ++++++---- - include/linux/gpio/driver.h | 14 +++++++++++++- - 2 files changed, 19 insertions(+), 5 deletions(-) - ---- a/drivers/gpio/gpiolib.c -+++ b/drivers/gpio/gpiolib.c -@@ -280,7 +280,7 @@ static int gpiochip_set_desc_names(struc - } - - /** -- * gpiochip_add() - register a gpio_chip -+ * gpiochip_add_data() - register a gpio_chip - * @chip: the chip to register, with chip->base initialized - * Context: potentially before irqs will work - * -@@ -288,7 +288,7 @@ static int gpiochip_set_desc_names(struc - * because the chip->base is invalid or already associated with a - * different chip. Otherwise it returns zero as a success code. - * -- * When gpiochip_add() is called very early during boot, so that GPIOs -+ * When gpiochip_add_data() is called very early during boot, so that GPIOs - * can be freely used, the chip->dev device must be registered before - * the gpio framework's arch_initcall(). Otherwise sysfs initialization - * for GPIOs will fail rudely. -@@ -296,7 +296,7 @@ static int gpiochip_set_desc_names(struc - * If chip->base is negative, this requests dynamic assignment of - * a range of valid GPIOs. - */ --int gpiochip_add(struct gpio_chip *chip) -+int gpiochip_add_data(struct gpio_chip *chip, void *data) - { - unsigned long flags; - int status = 0; -@@ -308,6 +308,8 @@ int gpiochip_add(struct gpio_chip *chip) - if (!descs) - return -ENOMEM; - -+ chip->data = data; -+ - spin_lock_irqsave(&gpio_lock, flags); - - if (base < 0) { -@@ -389,7 +391,7 @@ err_free_descs: - chip->label ? : "generic"); - return status; - } --EXPORT_SYMBOL_GPL(gpiochip_add); -+EXPORT_SYMBOL_GPL(gpiochip_add_data); - - /** - * gpiochip_remove() - unregister a gpio_chip ---- a/include/linux/gpio/driver.h -+++ b/include/linux/gpio/driver.h -@@ -23,6 +23,7 @@ struct seq_file; - * @dev: optional device providing the GPIOs - * @cdev: class device used by sysfs interface (may be NULL) - * @owner: helps prevent removal of modules exporting active GPIOs -+ * @data: per-instance data assigned by the driver - * @list: links gpio_chips together for traversal - * @request: optional hook for chip-specific activation, such as - * enabling module power and clock; may sleep -@@ -92,6 +93,7 @@ struct gpio_chip { - struct device *dev; - struct device *cdev; - struct module *owner; -+ void *data; - struct list_head list; - - int (*request)(struct gpio_chip *chip, -@@ -166,7 +168,11 @@ extern const char *gpiochip_is_requested - unsigned offset); - - /* add/remove chips */ --extern int gpiochip_add(struct gpio_chip *chip); -+extern int gpiochip_add_data(struct gpio_chip *chip, void *data); -+static inline int gpiochip_add(struct gpio_chip *chip) -+{ -+ return gpiochip_add_data(chip, NULL); -+} - extern void gpiochip_remove(struct gpio_chip *chip); - extern struct gpio_chip *gpiochip_find(void *data, - int (*match)(struct gpio_chip *chip, void *data)); -@@ -175,6 +181,12 @@ extern struct gpio_chip *gpiochip_find(v - int gpiochip_lock_as_irq(struct gpio_chip *chip, unsigned int offset); - void gpiochip_unlock_as_irq(struct gpio_chip *chip, unsigned int offset); - -+/* get driver data */ -+static inline void *gpiochip_get_data(struct gpio_chip *chip) -+{ -+ return chip->data; -+} -+ - struct gpio_chip *gpiod_to_chip(const struct gpio_desc *desc); - - #ifdef CONFIG_GPIOLIB_IRQCHIP |