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/mutex.h>
13 #include <linux/radix-tree.h>
14 #include <linux/pinctrl/pinconf.h>
16 struct pinctrl_gpio_range;
19 * struct pinctrl_dev - pin control class device
20 * @node: node to include this pin controller in the global pin controller list
21 * @desc: the pin controller descriptor supplied when initializing this pin
23 * @pin_desc_tree: each pin descriptor for this pin controller is stored in
25 * @gpio_ranges: a list of GPIO ranges that is handled by this pin controller,
26 * ranges are added to this list at runtime
27 * @dev: the device entry for this pin controller
28 * @owner: module providing the pin controller, used for refcounting
29 * @driver_data: driver data for drivers registering to the pin controller
31 * @p: result of pinctrl_get() for this device
32 * @device_root: debugfs root for this device
35 struct list_head node;
36 struct pinctrl_desc *desc;
37 struct radix_tree_root pin_desc_tree;
38 struct list_head gpio_ranges;
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 * @state: the state name passed to pinctrl_get()
53 * @usecount: the number of active users of this pin controller setting, used
54 * to keep track of nested use cases
55 * @settings: a list of settings for this device/state
58 struct list_head node;
62 struct list_head settings;
66 * struct pinctrl_setting - an individual mux setting
67 * @node: list node for struct pinctrl's @settings field
68 * @pctldev: pin control device handling to be programmed
69 * @group_selector: the group selector to program
70 * @func_selector: the function selector to program
72 struct pinctrl_setting {
73 struct list_head node;
74 struct pinctrl_dev *pctldev;
75 unsigned group_selector;
76 unsigned func_selector;
80 * struct pin_desc - pin descriptor for each physical pin in the arch
81 * @pctldev: corresponding pin control device
82 * @name: a name for the pin, e.g. the name of the pin/pad/finger on a
84 * @dynamic_name: if the name of this pin was dynamically allocated
85 * @owner: the device holding this pin or NULL of no device has claimed it
88 struct pinctrl_dev *pctldev;
91 /* These fields only added when supporting pinmux drivers */
97 struct pinctrl_dev *get_pinctrl_dev_from_devname(const char *dev_name);
98 int pin_get_from_name(struct pinctrl_dev *pctldev, const char *name);
99 int pinctrl_get_group_selector(struct pinctrl_dev *pctldev,
100 const char *pin_group);
102 static inline struct pin_desc *pin_desc_get(struct pinctrl_dev *pctldev,
105 return radix_tree_lookup(&pctldev->pin_desc_tree, pin);
108 extern struct mutex pinctrl_mutex;