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authorLinus Torvalds <torvalds@linux-foundation.org>2013-02-26 09:35:29 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2013-02-26 09:35:29 -0800
commit4c8c225abf972ce422c241579ce1d4d27eaeb166 (patch)
tree77bc67defdc53c494b20632e66b82ce9be3c06af /include/asm-generic
parent3eb05225ee8efb81fe50558f5f9d94e7477ade8f (diff)
parent9170100ee46402af6d318134525c728027318d67 (diff)
downloadlinux-4c8c225abf972ce422c241579ce1d4d27eaeb166.tar.bz2
Merge tag 'gpio-for-linus' of git://git.secretlab.ca/git/linux
Pull GPIO changes from Grant Likely: "This branch contains the usual set of individual driver improvements and bug fixes, as well as updates to the core code. The more notable changes include: - Internally add new API for referencing GPIOs by gpio_desc instead of number. Eventually this will become a public API - ACPI GPIO binding support" * tag 'gpio-for-linus' of git://git.secretlab.ca/git/linux: (33 commits) arm64: select ARCH_WANT_OPTIONAL_GPIOLIB gpio: em: Use irq_domain_add_simple() to fix runtime error gpio: using common order: let 'static const' instead of 'const static' gpio/vt8500: memory cleanup missing gpiolib: Fix locking on gpio debugfs files gpiolib: let gpio_chip reference its descriptors gpiolib: use descriptors internally gpiolib: use gpio_chips list in gpiochip_find_base gpiolib: use gpio_chips list in sysfs ops gpiolib: use gpio_chips list in gpiochip_find gpiolib: use gpio_chips list in gpiolib_sysfs_init gpiolib: link all gpio_chips using a list gpio/langwell: cleanup driver gpio/langwell: Add Cloverview ids to pci device table gpio/lynxpoint: add chipset gpio driver. gpiolib: add missing braces in gpio_direction_show gpiolib-acpi: Fix error checks in interrupt requesting gpio: mpc8xxx: don't set IRQ_TYPE_NONE when creating irq mapping gpiolib: remove gpiochip_reserve() arm: pxa: tosa: do not use gpiochip_reserve() ...
Diffstat (limited to 'include/asm-generic')
-rw-r--r--include/asm-generic/gpio.h86
1 files changed, 42 insertions, 44 deletions
diff --git a/include/asm-generic/gpio.h b/include/asm-generic/gpio.h
index 20ca7663975f..bde646995d10 100644
--- a/include/asm-generic/gpio.h
+++ b/include/asm-generic/gpio.h
@@ -47,12 +47,14 @@ struct gpio;
struct seq_file;
struct module;
struct device_node;
+struct gpio_desc;
/**
* struct gpio_chip - abstract a GPIO controller
* @label: for diagnostics
* @dev: optional device providing the GPIOs
* @owner: helps prevent removal of modules exporting active GPIOs
+ * @list: links gpio_chips together for traversal
* @request: optional hook for chip-specific activation, such as
* enabling module power and clock; may sleep
* @free: optional hook for chip-specific deactivation, such as
@@ -75,6 +77,7 @@ struct device_node;
* negative during registration, requests dynamic ID allocation.
* @ngpio: the number of GPIOs handled by this controller; the last GPIO
* handled is (base + ngpio - 1).
+ * @desc: array of ngpio descriptors. Private.
* @can_sleep: flag must be set iff get()/set() methods sleep, as they
* must while accessing GPIO expander chips over I2C or SPI
* @names: if set, must be an array of strings to use as alternative
@@ -98,6 +101,7 @@ struct gpio_chip {
const char *label;
struct device *dev;
struct module *owner;
+ struct list_head list;
int (*request)(struct gpio_chip *chip,
unsigned offset);
@@ -124,6 +128,7 @@ struct gpio_chip {
struct gpio_chip *chip);
int base;
u16 ngpio;
+ struct gpio_desc *desc;
const char *const *names;
unsigned can_sleep:1;
unsigned exported:1;
@@ -152,7 +157,6 @@ struct gpio_chip {
extern const char *gpiochip_is_requested(struct gpio_chip *chip,
unsigned offset);
extern struct gpio_chip *gpio_to_chip(unsigned gpio);
-extern int __must_check gpiochip_reserve(int start, int ngpio);
/* add/remove chips */
extern int gpiochip_add(struct gpio_chip *chip);
@@ -192,12 +196,6 @@ extern int gpio_request_one(unsigned gpio, unsigned long flags, const char *labe
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);
-int devm_gpio_request_one(struct device *dev, unsigned gpio,
- unsigned long flags, const char *label);
-void devm_gpio_free(struct device *dev, unsigned int gpio);
-
#ifdef CONFIG_GPIO_SYSFS
/*
@@ -212,6 +210,43 @@ extern void gpio_unexport(unsigned gpio);
#endif /* CONFIG_GPIO_SYSFS */
+#ifdef CONFIG_PINCTRL
+
+/**
+ * struct gpio_pin_range - pin range controlled by a gpio chip
+ * @head: list for maintaining set of pin ranges, used internally
+ * @pctldev: pinctrl device which handles corresponding pins
+ * @range: actual range of pins controlled by a gpio controller
+ */
+
+struct gpio_pin_range {
+ struct list_head node;
+ struct pinctrl_dev *pctldev;
+ struct pinctrl_gpio_range range;
+};
+
+int gpiochip_add_pin_range(struct gpio_chip *chip, const char *pinctl_name,
+ unsigned int gpio_offset, unsigned int pin_offset,
+ unsigned int npins);
+void gpiochip_remove_pin_ranges(struct gpio_chip *chip);
+
+#else
+
+static inline int
+gpiochip_add_pin_range(struct gpio_chip *chip, const char *pinctl_name,
+ unsigned int gpio_offset, unsigned int pin_offset,
+ unsigned int npins)
+{
+ return 0;
+}
+
+static inline void
+gpiochip_remove_pin_ranges(struct gpio_chip *chip)
+{
+}
+
+#endif /* CONFIG_PINCTRL */
+
#else /* !CONFIG_GPIOLIB */
static inline bool gpio_is_valid(int number)
@@ -270,41 +305,4 @@ static inline void gpio_unexport(unsigned gpio)
}
#endif /* CONFIG_GPIO_SYSFS */
-#ifdef CONFIG_PINCTRL
-
-/**
- * struct gpio_pin_range - pin range controlled by a gpio chip
- * @head: list for maintaining set of pin ranges, used internally
- * @pctldev: pinctrl device which handles corresponding pins
- * @range: actual range of pins controlled by a gpio controller
- */
-
-struct gpio_pin_range {
- struct list_head node;
- struct pinctrl_dev *pctldev;
- struct pinctrl_gpio_range range;
-};
-
-int gpiochip_add_pin_range(struct gpio_chip *chip, const char *pinctl_name,
- unsigned int gpio_offset, unsigned int pin_offset,
- unsigned int npins);
-void gpiochip_remove_pin_ranges(struct gpio_chip *chip);
-
-#else
-
-static inline int
-gpiochip_add_pin_range(struct gpio_chip *chip, const char *pinctl_name,
- unsigned int gpio_offset, unsigned int pin_offset,
- unsigned int npins)
-{
- return 0;
-}
-
-static inline void
-gpiochip_remove_pin_ranges(struct gpio_chip *chip)
-{
-}
-
-#endif /* CONFIG_PINCTRL */
-
#endif /* _ASM_GENERIC_GPIO_H */