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472a61e777
The user space like gpioinfo only see the GPIO usage but not the MUX usage (e.g. I2C or SPI usage) of a pin. As a user we want to know which pin is free/safe to use. So take the MUX usage of strict pinmux controllers into account to get a more realistic view for ioctl GPIO_GET_LINEINFO_IOCTL. Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com> Tested-by: Ramon Fried <rfried.dev@gmail.com> Signed-off-by: Ramon Fried <rfried.dev@gmail.com> Link: https://lore.kernel.org/r/20190814110035.13451-1-ramon.fried@linux.intel.com Acked-by: Stefan Wahren <stefan.wahren@i2se.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
169 lines
4.2 KiB
C
169 lines
4.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Internal interface between the core pin control system and the
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* pinmux portions
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*
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* Copyright (C) 2011 ST-Ericsson SA
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* Written on behalf of Linaro for ST-Ericsson
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* Based on bits of regulator core, gpio core and clk core
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*
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* Author: Linus Walleij <linus.walleij@linaro.org>
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*/
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#ifdef CONFIG_PINMUX
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int pinmux_check_ops(struct pinctrl_dev *pctldev);
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int pinmux_validate_map(const struct pinctrl_map *map, int i);
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bool pinmux_can_be_used_for_gpio(struct pinctrl_dev *pctldev, unsigned pin);
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int pinmux_request_gpio(struct pinctrl_dev *pctldev,
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struct pinctrl_gpio_range *range,
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unsigned pin, unsigned gpio);
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void pinmux_free_gpio(struct pinctrl_dev *pctldev, unsigned pin,
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struct pinctrl_gpio_range *range);
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int pinmux_gpio_direction(struct pinctrl_dev *pctldev,
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struct pinctrl_gpio_range *range,
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unsigned pin, bool input);
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int pinmux_map_to_setting(const struct pinctrl_map *map,
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struct pinctrl_setting *setting);
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void pinmux_free_setting(const struct pinctrl_setting *setting);
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int pinmux_enable_setting(const struct pinctrl_setting *setting);
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void pinmux_disable_setting(const struct pinctrl_setting *setting);
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#else
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static inline int pinmux_check_ops(struct pinctrl_dev *pctldev)
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{
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return 0;
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}
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static inline int pinmux_validate_map(const struct pinctrl_map *map, int i)
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{
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return 0;
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}
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static inline bool pinmux_can_be_used_for_gpio(struct pinctrl_dev *pctldev,
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unsigned pin)
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{
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return true;
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}
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static inline int pinmux_request_gpio(struct pinctrl_dev *pctldev,
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struct pinctrl_gpio_range *range,
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unsigned pin, unsigned gpio)
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{
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return 0;
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}
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static inline void pinmux_free_gpio(struct pinctrl_dev *pctldev,
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unsigned pin,
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struct pinctrl_gpio_range *range)
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{
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}
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static inline int pinmux_gpio_direction(struct pinctrl_dev *pctldev,
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struct pinctrl_gpio_range *range,
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unsigned pin, bool input)
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{
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return 0;
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}
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static inline int pinmux_map_to_setting(const struct pinctrl_map *map,
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struct pinctrl_setting *setting)
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{
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return 0;
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}
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static inline void pinmux_free_setting(const struct pinctrl_setting *setting)
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{
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}
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static inline int pinmux_enable_setting(const struct pinctrl_setting *setting)
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{
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return 0;
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}
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static inline void pinmux_disable_setting(const struct pinctrl_setting *setting)
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{
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}
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#endif
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#if defined(CONFIG_PINMUX) && defined(CONFIG_DEBUG_FS)
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void pinmux_show_map(struct seq_file *s, const struct pinctrl_map *map);
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void pinmux_show_setting(struct seq_file *s,
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const struct pinctrl_setting *setting);
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void pinmux_init_device_debugfs(struct dentry *devroot,
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struct pinctrl_dev *pctldev);
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#else
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static inline void pinmux_show_map(struct seq_file *s,
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const struct pinctrl_map *map)
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{
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}
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static inline void pinmux_show_setting(struct seq_file *s,
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const struct pinctrl_setting *setting)
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{
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}
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static inline void pinmux_init_device_debugfs(struct dentry *devroot,
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struct pinctrl_dev *pctldev)
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{
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}
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#endif
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#ifdef CONFIG_GENERIC_PINMUX_FUNCTIONS
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/**
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* struct function_desc - generic function descriptor
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* @name: name of the function
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* @group_names: array of pin group names
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* @num_group_names: number of pin group names
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* @data: pin controller driver specific data
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*/
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struct function_desc {
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const char *name;
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const char **group_names;
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int num_group_names;
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void *data;
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};
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int pinmux_generic_get_function_count(struct pinctrl_dev *pctldev);
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const char *
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pinmux_generic_get_function_name(struct pinctrl_dev *pctldev,
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unsigned int selector);
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int pinmux_generic_get_function_groups(struct pinctrl_dev *pctldev,
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unsigned int selector,
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const char * const **groups,
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unsigned * const num_groups);
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struct function_desc *pinmux_generic_get_function(struct pinctrl_dev *pctldev,
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unsigned int selector);
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int pinmux_generic_add_function(struct pinctrl_dev *pctldev,
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const char *name,
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const char **groups,
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unsigned const num_groups,
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void *data);
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int pinmux_generic_remove_function(struct pinctrl_dev *pctldev,
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unsigned int selector);
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void pinmux_generic_free_functions(struct pinctrl_dev *pctldev);
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#else
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static inline void pinmux_generic_free_functions(struct pinctrl_dev *pctldev)
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{
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}
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#endif /* CONFIG_GENERIC_PINMUX_FUNCTIONS */
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