| 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 | |
| 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; |
| Stephen Warren | 9af1e44 | 2011-10-19 16:19:27 -0600 | [diff] [blame] | 58 | const char *name; |
| Linus Walleij | 2744e8a | 2011-05-02 20:50:54 +0200 | [diff] [blame] | 59 | spinlock_t lock; |
| 60 | /* These fields only added when supporting pinmux drivers */ |
| 61 | #ifdef CONFIG_PINMUX |
| Stephen Warren | 5d2eaf8 | 2011-10-19 16:19:28 -0600 | [diff] [blame] | 62 | const char *mux_function; |
| Linus Walleij | 2744e8a | 2011-05-02 20:50:54 +0200 | [diff] [blame] | 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); |