33d58949ad
We want singned pins to mean "invalid" only on the outside of the subsystem. Signed-off-by: Marek Belisko <marek.belisko@open-nandra.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
73 lines
2.5 KiB
C
73 lines
2.5 KiB
C
/*
|
|
* 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, unsigned int pin);
|
|
int pinctrl_get_device_gpio_range(unsigned gpio,
|
|
struct pinctrl_dev **outdev,
|
|
struct pinctrl_gpio_range **outrange);
|
|
int pinctrl_get_group_selector(struct pinctrl_dev *pctldev,
|
|
const char *pin_group);
|