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2744e8af LW |
1 | /* |
2 | * Core private header for the pin control subsystem | |
3 | * | |
4 | * Copyright (C) 2011 ST-Ericsson SA | |
5 | * Written on behalf of Linaro for ST-Ericsson | |
6 | * | |
7 | * Author: Linus Walleij <linus.walleij@linaro.org> | |
8 | * | |
9 | * License terms: GNU General Public License (GPL) version 2 | |
10 | */ | |
11 | ||
ae6b4d85 LW |
12 | #include <linux/pinctrl/pinconf.h> |
13 | ||
14 | struct pinctrl_gpio_range; | |
15 | ||
2744e8af LW |
16 | /** |
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 | |
20 | * controller | |
21 | * @pin_desc_tree: each pin descriptor for this pin controller is stored in | |
22 | * this radix tree | |
23 | * @pin_desc_tree_lock: lock for the descriptor tree | |
24 | * @gpio_ranges: a list of GPIO ranges that is handled by this pin controller, | |
25 | * ranges are added to this list at runtime | |
26 | * @gpio_ranges_lock: lock for the GPIO ranges list | |
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 | |
30 | * subsystem | |
e93bcee0 LW |
31 | * @pinctrl_hogs_lock: lock for the pin control hog list |
32 | * @pinctrl_hogs: list of pin control maps hogged by this device | |
befe5bdf | 33 | * @device_root: debugfs root for this device |
2744e8af LW |
34 | */ |
35 | struct pinctrl_dev { | |
36 | struct list_head node; | |
37 | struct pinctrl_desc *desc; | |
38 | struct radix_tree_root pin_desc_tree; | |
39 | spinlock_t pin_desc_tree_lock; | |
40 | struct list_head gpio_ranges; | |
41 | struct mutex gpio_ranges_lock; | |
51cd24ee | 42 | struct device *dev; |
2744e8af LW |
43 | struct module *owner; |
44 | void *driver_data; | |
befe5bdf LW |
45 | struct mutex pinctrl_hogs_lock; |
46 | struct list_head pinctrl_hogs; | |
02157160 TL |
47 | #ifdef CONFIG_DEBUG_FS |
48 | struct dentry *device_root; | |
49 | #endif | |
befe5bdf LW |
50 | }; |
51 | ||
52 | /** | |
53 | * struct pinctrl - per-device pin control state holder | |
54 | * @node: global list node | |
55 | * @dev: the device using this pin control handle | |
56 | * @usecount: the number of active users of this pin controller setting, used | |
57 | * to keep track of nested use cases | |
58 | * @pctldev: pin control device handling this pin control handle | |
59 | * @mutex: a lock for the pin control state holder | |
60 | * @func_selector: the function selector for the pinmux device handling | |
61 | * this pinmux | |
62 | * @groups: the group selectors for the pinmux device and | |
63 | * selector combination handling this pinmux, this is a list that | |
64 | * will be traversed on all pinmux operations such as | |
65 | * get/put/enable/disable | |
66 | */ | |
67 | struct pinctrl { | |
68 | struct list_head node; | |
69 | struct device *dev; | |
70 | unsigned usecount; | |
71 | struct pinctrl_dev *pctldev; | |
72 | struct mutex mutex; | |
2744e8af | 73 | #ifdef CONFIG_PINMUX |
befe5bdf LW |
74 | unsigned func_selector; |
75 | struct list_head groups; | |
2744e8af LW |
76 | #endif |
77 | }; | |
78 | ||
79 | /** | |
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 | |
83 | * datasheet or such | |
ca53c5f1 | 84 | * @dynamic_name: if the name of this pin was dynamically allocated |
2744e8af LW |
85 | * @lock: a lock to protect the descriptor structure |
86 | * @mux_requested: whether the pin is already requested by pinmux or not | |
87 | * @mux_function: a named muxing function for the pin that will be passed to | |
88 | * subdrivers and shown in debugfs etc | |
89 | */ | |
90 | struct pin_desc { | |
91 | struct pinctrl_dev *pctldev; | |
9af1e44f | 92 | const char *name; |
ca53c5f1 | 93 | bool dynamic_name; |
2744e8af LW |
94 | spinlock_t lock; |
95 | /* These fields only added when supporting pinmux drivers */ | |
96 | #ifdef CONFIG_PINMUX | |
3cc70ed3 | 97 | const char *owner; |
2744e8af LW |
98 | #endif |
99 | }; | |
100 | ||
9dfac4fd | 101 | struct pinctrl_dev *get_pinctrl_dev_from_devname(const char *dev_name); |
33d58949 | 102 | struct pin_desc *pin_desc_get(struct pinctrl_dev *pctldev, unsigned int pin); |
ae6b4d85 | 103 | int pin_get_from_name(struct pinctrl_dev *pctldev, const char *name); |
7afde8ba LW |
104 | int pinctrl_get_group_selector(struct pinctrl_dev *pctldev, |
105 | const char *pin_group); |