2 * Core private header for the pin control subsystem
4 * Copyright (C) 2011 ST-Ericsson SA
5 * Written on behalf of Linaro for ST-Ericsson
7 * Author: Linus Walleij <linus.walleij@linaro.org>
9 * License terms: GNU General Public License (GPL) version 2
12 #include <linux/pinctrl/pinconf.h>
14 struct pinctrl_gpio_range;
17 * struct pinctrl_dev - pin control class device
18 * @node: node to include this pin controller in the global pin controller list
19 * @desc: the pin controller descriptor supplied when initializing this pin
21 * @pin_desc_tree: each pin descriptor for this pin controller is stored in
23 * @gpio_ranges: a list of GPIO ranges that is handled by this pin controller,
24 * ranges are added to this list at runtime
25 * @gpio_ranges_lock: lock for the GPIO ranges list
26 * @dev: the device entry for this pin controller
27 * @owner: module providing the pin controller, used for refcounting
28 * @driver_data: driver data for drivers registering to the pin controller
30 * @p: result of pinctrl_get() for this device
31 * @device_root: debugfs root for this device
34 struct list_head node;
35 struct pinctrl_desc *desc;
36 struct radix_tree_root pin_desc_tree;
37 struct list_head gpio_ranges;
38 struct mutex gpio_ranges_lock;
43 #ifdef CONFIG_DEBUG_FS
44 struct dentry *device_root;
49 * struct pinctrl - per-device pin control state holder
50 * @node: global list node
51 * @dev: the device using this pin control handle
52 * @usecount: the number of active users of this pin controller setting, used
53 * to keep track of nested use cases
54 * @pctldev: pin control device handling this pin control handle
55 * @mutex: a lock for the pin control state holder
56 * @groups: the group selectors for the pinmux device and
57 * selector combination handling this pinmux, this is a list that
58 * will be traversed on all pinmux operations such as
59 * get/put/enable/disable
62 struct list_head node;
65 struct pinctrl_dev *pctldev;
68 struct list_head groups;
73 * struct pin_desc - pin descriptor for each physical pin in the arch
74 * @pctldev: corresponding pin control device
75 * @name: a name for the pin, e.g. the name of the pin/pad/finger on a
77 * @dynamic_name: if the name of this pin was dynamically allocated
78 * @lock: a lock to protect the descriptor structure
79 * @owner: the device holding this pin or NULL of no device has claimed it
82 struct pinctrl_dev *pctldev;
86 /* These fields only added when supporting pinmux drivers */
92 struct pinctrl_dev *get_pinctrl_dev_from_devname(const char *dev_name);
93 int pin_get_from_name(struct pinctrl_dev *pctldev, const char *name);
94 int pinctrl_get_group_selector(struct pinctrl_dev *pctldev,
95 const char *pin_group);
97 static inline struct pin_desc *pin_desc_get(struct pinctrl_dev *pctldev,
100 return radix_tree_lookup(&pctldev->pin_desc_tree, pin);