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 * @device_root: debugfs root for this device
36 struct list_head node;
37 struct pinctrl_desc *desc;
38 struct radix_tree_root pin_desc_tree;
39 struct list_head gpio_ranges;
44 #ifdef CONFIG_DEBUG_FS
45 struct dentry *device_root;
50 * struct pinctrl - per-device pin control state holder
51 * @node: global list node
52 * @dev: the device using this pin control handle
53 * @states: a list of states for this device
54 * @state: the current state
55 * @dt_maps: the mapping table chunks dynamically parsed from device tree for
59 struct list_head node;
61 struct list_head states;
62 struct pinctrl_state *state;
63 struct list_head dt_maps;
67 * struct pinctrl_state - a pinctrl state for a device
68 * @node: list not for struct pinctrl's @states field
69 * @name: the name of this state
70 * @settings: a list of settings for this state
72 struct pinctrl_state {
73 struct list_head node;
75 struct list_head settings;
79 * struct pinctrl_setting_mux - setting data for MAP_TYPE_MUX_GROUP
80 * @group: the group selector to program
81 * @func: the function selector to program
83 struct pinctrl_setting_mux {
89 * struct pinctrl_setting_configs - setting data for MAP_TYPE_CONFIGS_*
90 * @group_or_pin: the group selector or pin ID to program
91 * @configs: a pointer to an array of config parameters/values to program into
92 * hardware. Each individual pin controller defines the format and meaning
93 * of config parameters.
94 * @num_configs: the number of entries in array @configs
96 struct pinctrl_setting_configs {
97 unsigned group_or_pin;
98 unsigned long *configs;
103 * struct pinctrl_setting - an individual mux or config setting
104 * @node: list node for struct pinctrl_settings's @settings field
105 * @type: the type of setting
106 * @pctldev: pin control device handling to be programmed. Not used for
107 * PIN_MAP_TYPE_DUMMY_STATE.
108 * @dev_name: the name of the device using this state
109 * @data: Data specific to the setting type
111 struct pinctrl_setting {
112 struct list_head node;
113 enum pinctrl_map_type type;
114 struct pinctrl_dev *pctldev;
115 const char *dev_name;
117 struct pinctrl_setting_mux mux;
118 struct pinctrl_setting_configs configs;
123 * struct pin_desc - pin descriptor for each physical pin in the arch
124 * @pctldev: corresponding pin control device
125 * @name: a name for the pin, e.g. the name of the pin/pad/finger on a
127 * @dynamic_name: if the name of this pin was dynamically allocated
128 * @mux_usecount: If zero, the pin is not claimed, and @owner should be NULL.
129 * If non-zero, this pin is claimed by @owner. This field is an integer
130 * rather than a boolean, since pinctrl_get() might process multiple
131 * mapping table entries that refer to, and hence claim, the same group
132 * or pin, and each of these will increment the @usecount.
133 * @mux_owner: The name of device that called pinctrl_get().
134 * @mux_setting: The most recent selected mux setting for this pin, if any.
135 * @gpio_owner: If pinctrl_request_gpio() was called for this pin, this is
136 * the name of the GPIO that "owns" this pin.
139 struct pinctrl_dev *pctldev;
142 /* These fields only added when supporting pinmux drivers */
144 unsigned mux_usecount;
145 const char *mux_owner;
146 const struct pinctrl_setting_mux *mux_setting;
147 const char *gpio_owner;
151 struct pinctrl_dev *get_pinctrl_dev_from_devname(const char *dev_name);
152 int pin_get_from_name(struct pinctrl_dev *pctldev, const char *name);
153 const char *pin_get_name(struct pinctrl_dev *pctldev, const unsigned pin);
154 int pinctrl_get_group_selector(struct pinctrl_dev *pctldev,
155 const char *pin_group);
157 static inline struct pin_desc *pin_desc_get(struct pinctrl_dev *pctldev,
160 return radix_tree_lookup(&pctldev->pin_desc_tree, pin);
163 int pinctrl_register_map(struct pinctrl_map const *maps, unsigned num_maps,
164 bool dup, bool locked);
165 void pinctrl_unregister_map(struct pinctrl_map const *map);
167 extern struct mutex pinctrl_mutex;
168 extern struct list_head pinctrldev_list;