Linus Walleij | 2744e8a | 2011-05-02 20:50:54 +0200 | [diff] [blame] | 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 | |
Stephen Warren | 57b676f | 2012-03-02 13:05:44 -0700 | [diff] [blame] | 12 | #include <linux/mutex.h> |
| 13 | #include <linux/radix-tree.h> |
Linus Walleij | ae6b4d8 | 2011-10-19 18:14:33 +0200 | [diff] [blame] | 14 | #include <linux/pinctrl/pinconf.h> |
| 15 | |
| 16 | struct pinctrl_gpio_range; |
| 17 | |
Linus Walleij | 2744e8a | 2011-05-02 20:50:54 +0200 | [diff] [blame] | 18 | /** |
| 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 |
| 22 | * controller |
| 23 | * @pin_desc_tree: each pin descriptor for this pin controller is stored in |
| 24 | * this radix tree |
Linus Walleij | 2744e8a | 2011-05-02 20:50:54 +0200 | [diff] [blame] | 25 | * @gpio_ranges: a list of GPIO ranges that is handled by this pin controller, |
| 26 | * ranges are added to this list at runtime |
Linus Walleij | 2744e8a | 2011-05-02 20:50:54 +0200 | [diff] [blame] | 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 |
Stephen Warren | 46919ae | 2012-03-01 18:48:32 -0700 | [diff] [blame] | 31 | * @p: result of pinctrl_get() for this device |
Linus Walleij | befe5bd | 2012-02-09 19:47:48 +0100 | [diff] [blame] | 32 | * @device_root: debugfs root for this device |
Linus Walleij | 2744e8a | 2011-05-02 20:50:54 +0200 | [diff] [blame] | 33 | */ |
| 34 | struct pinctrl_dev { |
| 35 | struct list_head node; |
| 36 | struct pinctrl_desc *desc; |
| 37 | struct radix_tree_root pin_desc_tree; |
Linus Walleij | 2744e8a | 2011-05-02 20:50:54 +0200 | [diff] [blame] | 38 | struct list_head gpio_ranges; |
Stephen Warren | 51cd24e | 2011-12-09 16:59:05 -0700 | [diff] [blame] | 39 | struct device *dev; |
Linus Walleij | 2744e8a | 2011-05-02 20:50:54 +0200 | [diff] [blame] | 40 | struct module *owner; |
| 41 | void *driver_data; |
Stephen Warren | 46919ae | 2012-03-01 18:48:32 -0700 | [diff] [blame] | 42 | struct pinctrl *p; |
Tony Lindgren | 0215716 | 2012-01-20 08:17:22 -0800 | [diff] [blame] | 43 | #ifdef CONFIG_DEBUG_FS |
| 44 | struct dentry *device_root; |
| 45 | #endif |
Linus Walleij | befe5bd | 2012-02-09 19:47:48 +0100 | [diff] [blame] | 46 | }; |
| 47 | |
| 48 | /** |
| 49 | * struct pinctrl - per-device pin control state holder |
| 50 | * @node: global list node |
| 51 | * @dev: the device using this pin control handle |
Stephen Warren | 7ecdb16 | 2012-03-02 13:05:45 -0700 | [diff] [blame^] | 52 | * @state: the state name passed to pinctrl_get() |
Linus Walleij | befe5bd | 2012-02-09 19:47:48 +0100 | [diff] [blame] | 53 | * @usecount: the number of active users of this pin controller setting, used |
| 54 | * to keep track of nested use cases |
Stephen Warren | 7ecdb16 | 2012-03-02 13:05:45 -0700 | [diff] [blame^] | 55 | * @settings: a list of settings for this device/state |
Linus Walleij | befe5bd | 2012-02-09 19:47:48 +0100 | [diff] [blame] | 56 | */ |
| 57 | struct pinctrl { |
| 58 | struct list_head node; |
| 59 | struct device *dev; |
Stephen Warren | 7ecdb16 | 2012-03-02 13:05:45 -0700 | [diff] [blame^] | 60 | const char *state; |
Linus Walleij | befe5bd | 2012-02-09 19:47:48 +0100 | [diff] [blame] | 61 | unsigned usecount; |
Stephen Warren | 7ecdb16 | 2012-03-02 13:05:45 -0700 | [diff] [blame^] | 62 | struct list_head settings; |
| 63 | }; |
| 64 | |
| 65 | /** |
| 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 |
| 71 | */ |
| 72 | struct pinctrl_setting { |
| 73 | struct list_head node; |
Linus Walleij | befe5bd | 2012-02-09 19:47:48 +0100 | [diff] [blame] | 74 | struct pinctrl_dev *pctldev; |
Stephen Warren | 7ecdb16 | 2012-03-02 13:05:45 -0700 | [diff] [blame^] | 75 | unsigned group_selector; |
| 76 | unsigned func_selector; |
Linus Walleij | 2744e8a | 2011-05-02 20:50:54 +0200 | [diff] [blame] | 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 |
Linus Walleij | ca53c5f | 2011-12-14 20:33:37 +0100 | [diff] [blame] | 84 | * @dynamic_name: if the name of this pin was dynamically allocated |
Linus Walleij | 962bcbc | 2012-03-02 16:52:46 +0100 | [diff] [blame] | 85 | * @owner: the device holding this pin or NULL of no device has claimed it |
Linus Walleij | 2744e8a | 2011-05-02 20:50:54 +0200 | [diff] [blame] | 86 | */ |
| 87 | struct pin_desc { |
| 88 | struct pinctrl_dev *pctldev; |
Stephen Warren | 9af1e44 | 2011-10-19 16:19:27 -0600 | [diff] [blame] | 89 | const char *name; |
Linus Walleij | ca53c5f | 2011-12-14 20:33:37 +0100 | [diff] [blame] | 90 | bool dynamic_name; |
Linus Walleij | 2744e8a | 2011-05-02 20:50:54 +0200 | [diff] [blame] | 91 | /* These fields only added when supporting pinmux drivers */ |
| 92 | #ifdef CONFIG_PINMUX |
Stephen Warren | 3cc70ed | 2012-02-19 23:45:44 -0700 | [diff] [blame] | 93 | const char *owner; |
Linus Walleij | 2744e8a | 2011-05-02 20:50:54 +0200 | [diff] [blame] | 94 | #endif |
| 95 | }; |
| 96 | |
Linus Walleij | 9dfac4f | 2012-02-01 18:02:47 +0100 | [diff] [blame] | 97 | struct pinctrl_dev *get_pinctrl_dev_from_devname(const char *dev_name); |
Linus Walleij | ae6b4d8 | 2011-10-19 18:14:33 +0200 | [diff] [blame] | 98 | int pin_get_from_name(struct pinctrl_dev *pctldev, const char *name); |
Linus Walleij | 7afde8b | 2011-10-19 17:07:16 +0200 | [diff] [blame] | 99 | int pinctrl_get_group_selector(struct pinctrl_dev *pctldev, |
| 100 | const char *pin_group); |
Stephen Warren | 2304b47 | 2012-02-22 14:26:01 -0700 | [diff] [blame] | 101 | |
| 102 | static inline struct pin_desc *pin_desc_get(struct pinctrl_dev *pctldev, |
| 103 | unsigned int pin) |
| 104 | { |
| 105 | return radix_tree_lookup(&pctldev->pin_desc_tree, pin); |
| 106 | } |
Stephen Warren | 57b676f | 2012-03-02 13:05:44 -0700 | [diff] [blame] | 107 | |
| 108 | extern struct mutex pinctrl_mutex; |