diff options
Diffstat (limited to 'drivers/pinctrl/core.h')
| -rw-r--r-- | drivers/pinctrl/core.h | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/drivers/pinctrl/core.h b/drivers/pinctrl/core.h new file mode 100644 index 00000000000..472fa1341cc --- /dev/null +++ b/drivers/pinctrl/core.h @@ -0,0 +1,71 @@ +/* + * Core private header for the pin control subsystem + * + * Copyright (C) 2011 ST-Ericsson SA + * Written on behalf of Linaro for ST-Ericsson + * + * Author: Linus Walleij <linus.walleij@linaro.org> + * + * License terms: GNU General Public License (GPL) version 2 + */ + +/** + * struct pinctrl_dev - pin control class device + * @node: node to include this pin controller in the global pin controller list + * @desc: the pin controller descriptor supplied when initializing this pin + * controller + * @pin_desc_tree: each pin descriptor for this pin controller is stored in + * this radix tree + * @pin_desc_tree_lock: lock for the descriptor tree + * @gpio_ranges: a list of GPIO ranges that is handled by this pin controller, + * ranges are added to this list at runtime + * @gpio_ranges_lock: lock for the GPIO ranges list + * @dev: the device entry for this pin controller + * @owner: module providing the pin controller, used for refcounting + * @driver_data: driver data for drivers registering to the pin controller + * subsystem + * @pinmux_hogs_lock: lock for the pinmux hog list + * @pinmux_hogs: list of pinmux maps hogged by this device + */ +struct pinctrl_dev { + struct list_head node; + struct pinctrl_desc *desc; + struct radix_tree_root pin_desc_tree; + spinlock_t pin_desc_tree_lock; + struct list_head gpio_ranges; + struct mutex gpio_ranges_lock; + struct device dev; + struct module *owner; + void *driver_data; +#ifdef CONFIG_PINMUX + struct mutex pinmux_hogs_lock; + struct list_head pinmux_hogs; +#endif +}; + +/** + * struct pin_desc - pin descriptor for each physical pin in the arch + * @pctldev: corresponding pin control device + * @name: a name for the pin, e.g. the name of the pin/pad/finger on a + * datasheet or such + * @lock: a lock to protect the descriptor structure + * @mux_requested: whether the pin is already requested by pinmux or not + * @mux_function: a named muxing function for the pin that will be passed to + * subdrivers and shown in debugfs etc + */ +struct pin_desc { + struct pinctrl_dev *pctldev; + const char *name; + spinlock_t lock; + /* These fields only added when supporting pinmux drivers */ +#ifdef CONFIG_PINMUX + const char *mux_function; +#endif +}; + +struct pinctrl_dev *get_pinctrl_dev_from_dev(struct device *dev, + const char *dev_name); +struct pin_desc *pin_desc_get(struct pinctrl_dev *pctldev, int pin); +int pinctrl_get_device_gpio_range(unsigned gpio, + struct pinctrl_dev **outdev, + struct pinctrl_gpio_range **outrange); |