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>
15 #include <linux/pinctrl/machine.h>
17 struct pinctrl_gpio_range;
20 * struct pinctrl_dev - pin control class device
21 * @node: node to include this pin controller in the global pin controller list
22 * @desc: the pin controller descriptor supplied when initializing this pin
24 * @pin_desc_tree: each pin descriptor for this pin controller is stored in
26 * @gpio_ranges: a list of GPIO ranges that is handled by this pin controller,
27 * ranges are added to this list at runtime
28 * @dev: the device entry for this pin controller
29 * @owner: module providing the pin controller, used for refcounting
30 * @driver_data: driver data for drivers registering to the pin controller
32 * @p: result of pinctrl_get() for this device
33 * @hog_default: default state for pins hogged by this device
34 * @hog_sleep: sleep state for pins hogged by this device
35 * @device_root: debugfs root for this device
38 struct list_head node;
39 struct pinctrl_desc *desc;
40 struct radix_tree_root pin_desc_tree;
41 struct list_head gpio_ranges;
46 struct pinctrl_state *hog_default;
47 struct pinctrl_state *hog_sleep;
48 #ifdef CONFIG_DEBUG_FS
49 struct dentry *device_root;
54 * struct pinctrl - per-device pin control state holder
55 * @node: global list node
56 * @dev: the device using this pin control handle
57 * @states: a list of states for this device
58 * @state: the current state
59 * @dt_maps: the mapping table chunks dynamically parsed from device tree for
63 struct list_head node;
65 struct list_head states;
66 struct pinctrl_state *state;
67 struct list_head dt_maps;
71 * struct pinctrl_state - a pinctrl state for a device
72 * @node: list not for struct pinctrl's @states field
73 * @name: the name of this state
74 * @settings: a list of settings for this state
76 struct pinctrl_state {
77 struct list_head node;
79 struct list_head settings;
83 * struct pinctrl_setting_mux - setting data for MAP_TYPE_MUX_GROUP
84 * @group: the group selector to program
85 * @func: the function selector to program
87 struct pinctrl_setting_mux {
93 * struct pinctrl_setting_configs - setting data for MAP_TYPE_CONFIGS_*
94 * @group_or_pin: the group selector or pin ID to program
95 * @configs: a pointer to an array of config parameters/values to program into
96 * hardware. Each individual pin controller defines the format and meaning
97 * of config parameters.
98 * @num_configs: the number of entries in array @configs
100 struct pinctrl_setting_configs {
101 unsigned group_or_pin;
102 unsigned long *configs;
103 unsigned num_configs;
107 * struct pinctrl_setting - an individual mux or config setting
108 * @node: list node for struct pinctrl_settings's @settings field
109 * @type: the type of setting
110 * @pctldev: pin control device handling to be programmed. Not used for
111 * PIN_MAP_TYPE_DUMMY_STATE.
112 * @dev_name: the name of the device using this state
113 * @data: Data specific to the setting type
115 struct pinctrl_setting {
116 struct list_head node;
117 enum pinctrl_map_type type;
118 struct pinctrl_dev *pctldev;
119 const char *dev_name;
121 struct pinctrl_setting_mux mux;
122 struct pinctrl_setting_configs configs;
127 * struct pin_desc - pin descriptor for each physical pin in the arch
128 * @pctldev: corresponding pin control device
129 * @name: a name for the pin, e.g. the name of the pin/pad/finger on a
131 * @dynamic_name: if the name of this pin was dynamically allocated
132 * @mux_usecount: If zero, the pin is not claimed, and @owner should be NULL.
133 * If non-zero, this pin is claimed by @owner. This field is an integer
134 * rather than a boolean, since pinctrl_get() might process multiple
135 * mapping table entries that refer to, and hence claim, the same group
136 * or pin, and each of these will increment the @usecount.
137 * @mux_owner: The name of device that called pinctrl_get().
138 * @mux_setting: The most recent selected mux setting for this pin, if any.
139 * @gpio_owner: If pinctrl_request_gpio() was called for this pin, this is
140 * the name of the GPIO that "owns" this pin.
143 struct pinctrl_dev *pctldev;
146 /* These fields only added when supporting pinmux drivers */
148 unsigned mux_usecount;
149 const char *mux_owner;
150 const struct pinctrl_setting_mux *mux_setting;
151 const char *gpio_owner;
155 struct pinctrl_dev *get_pinctrl_dev_from_devname(const char *dev_name);
156 int pin_get_from_name(struct pinctrl_dev *pctldev, const char *name);
157 const char *pin_get_name(struct pinctrl_dev *pctldev, const unsigned pin);
158 int pinctrl_get_group_selector(struct pinctrl_dev *pctldev,
159 const char *pin_group);
161 static inline struct pin_desc *pin_desc_get(struct pinctrl_dev *pctldev,
164 return radix_tree_lookup(&pctldev->pin_desc_tree, pin);
167 int pinctrl_register_map(struct pinctrl_map const *maps, unsigned num_maps,
168 bool dup, bool locked);
169 void pinctrl_unregister_map(struct pinctrl_map const *map);
171 extern int pinctrl_force_sleep(struct pinctrl_dev *pctldev);
172 extern int pinctrl_force_default(struct pinctrl_dev *pctldev);
174 extern struct mutex pinctrl_mutex;
175 extern struct list_head pinctrldev_list;