projects / mirror_ubuntu-bionic-kernel.git / blame
| 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 | ||
| 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 | |
| 31 | * @pinmux_hogs_lock: lock for the pinmux hog list | |
| 32 | * @pinmux_hogs: list of pinmux maps hogged by this device | |
| 33 | */ | |
| 34 | struct pinctrl_dev { | |
| 35 | struct list_head node; | |
| 36 | struct pinctrl_desc *desc; | |
| 37 | struct radix_tree_root pin_desc_tree; | |
| 38 | spinlock_t pin_desc_tree_lock; | |
| 39 | struct list_head gpio_ranges; | |
| 40 | struct mutex gpio_ranges_lock; | |
| 51cd24ee | 41 | struct device *dev; |
| 2744e8af LW |
42 | struct module *owner; |
| 43 | void *driver_data; | |
| 02157160 TL |
44 | #ifdef CONFIG_DEBUG_FS |
| 45 | struct dentry *device_root; | |
| 46 | #endif | |
| 2744e8af LW |
47 | #ifdef CONFIG_PINMUX |
| 48 | struct mutex pinmux_hogs_lock; | |
| 49 | struct list_head pinmux_hogs; | |
| 50 | #endif | |
| 51 | }; | |
| 52 | ||
| 53 | /** | |
| 54 | * struct pin_desc - pin descriptor for each physical pin in the arch | |
| 55 | * @pctldev: corresponding pin control device | |
| 56 | * @name: a name for the pin, e.g. the name of the pin/pad/finger on a | |
| 57 | * datasheet or such | |
| ca53c5f1 | 58 | * @dynamic_name: if the name of this pin was dynamically allocated |
| 2744e8af LW |
59 | * @lock: a lock to protect the descriptor structure |
| 60 | * @mux_requested: whether the pin is already requested by pinmux or not | |
| 61 | * @mux_function: a named muxing function for the pin that will be passed to | |
| 62 | * subdrivers and shown in debugfs etc | |
| 63 | */ | |
| 64 | struct pin_desc { | |
| 65 | struct pinctrl_dev *pctldev; | |
| 9af1e44f | 66 | const char *name; |
| ca53c5f1 | 67 | bool dynamic_name; |
| 2744e8af LW |
68 | spinlock_t lock; |
| 69 | /* These fields only added when supporting pinmux drivers */ | |
| 70 | #ifdef CONFIG_PINMUX | |
| 5d2eaf80 | 71 | const char *mux_function; |
| 2744e8af LW |
72 | #endif |
| 73 | }; | |
| 74 | ||
| 75 | struct pinctrl_dev *get_pinctrl_dev_from_dev(struct device *dev, | |
| 76 | const char *dev_name); | |
| 33d58949 | 77 | struct pin_desc *pin_desc_get(struct pinctrl_dev *pctldev, unsigned int pin); |
| ae6b4d85 | 78 | int pin_get_from_name(struct pinctrl_dev *pctldev, const char *name); |
| 2744e8af LW |
79 | int pinctrl_get_device_gpio_range(unsigned gpio, |
| 80 | struct pinctrl_dev **outdev, | |
| 81 | struct pinctrl_gpio_range **outrange); | |
| 7afde8ba LW |
82 | int pinctrl_get_group_selector(struct pinctrl_dev *pctldev, |
| 83 | const char *pin_group); |