Commit | Line | Data |
---|---|---|
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 | ||
12 | /** | |
13 | * struct pinctrl_dev - pin control class device | |
14 | * @node: node to include this pin controller in the global pin controller list | |
15 | * @desc: the pin controller descriptor supplied when initializing this pin | |
16 | * controller | |
17 | * @pin_desc_tree: each pin descriptor for this pin controller is stored in | |
18 | * this radix tree | |
19 | * @pin_desc_tree_lock: lock for the descriptor tree | |
20 | * @gpio_ranges: a list of GPIO ranges that is handled by this pin controller, | |
21 | * ranges are added to this list at runtime | |
22 | * @gpio_ranges_lock: lock for the GPIO ranges list | |
23 | * @dev: the device entry for this pin controller | |
24 | * @owner: module providing the pin controller, used for refcounting | |
25 | * @driver_data: driver data for drivers registering to the pin controller | |
26 | * subsystem | |
27 | * @pinmux_hogs_lock: lock for the pinmux hog list | |
28 | * @pinmux_hogs: list of pinmux maps hogged by this device | |
29 | */ | |
30 | struct pinctrl_dev { | |
31 | struct list_head node; | |
32 | struct pinctrl_desc *desc; | |
33 | struct radix_tree_root pin_desc_tree; | |
34 | spinlock_t pin_desc_tree_lock; | |
35 | struct list_head gpio_ranges; | |
36 | struct mutex gpio_ranges_lock; | |
37 | struct device dev; | |
38 | struct module *owner; | |
39 | void *driver_data; | |
40 | #ifdef CONFIG_PINMUX | |
41 | struct mutex pinmux_hogs_lock; | |
42 | struct list_head pinmux_hogs; | |
43 | #endif | |
44 | }; | |
45 | ||
46 | /** | |
47 | * struct pin_desc - pin descriptor for each physical pin in the arch | |
48 | * @pctldev: corresponding pin control device | |
49 | * @name: a name for the pin, e.g. the name of the pin/pad/finger on a | |
50 | * datasheet or such | |
51 | * @lock: a lock to protect the descriptor structure | |
52 | * @mux_requested: whether the pin is already requested by pinmux or not | |
53 | * @mux_function: a named muxing function for the pin that will be passed to | |
54 | * subdrivers and shown in debugfs etc | |
55 | */ | |
56 | struct pin_desc { | |
57 | struct pinctrl_dev *pctldev; | |
9af1e44f | 58 | const char *name; |
2744e8af LW |
59 | spinlock_t lock; |
60 | /* These fields only added when supporting pinmux drivers */ | |
61 | #ifdef CONFIG_PINMUX | |
5d2eaf80 | 62 | const char *mux_function; |
2744e8af LW |
63 | #endif |
64 | }; | |
65 | ||
66 | struct pinctrl_dev *get_pinctrl_dev_from_dev(struct device *dev, | |
67 | const char *dev_name); | |
68 | struct pin_desc *pin_desc_get(struct pinctrl_dev *pctldev, int pin); | |
69 | int pinctrl_get_device_gpio_range(unsigned gpio, | |
70 | struct pinctrl_dev **outdev, | |
71 | struct pinctrl_gpio_range **outrange); |