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15381bc7c7
When a GPIO driver is backed by a pinctrl driver the GPIO driver sometimes needs to call the pinctrl driver to configure certain things, like whether the pin is used as input or output. In addition to this there are other configurations applicable to GPIOs such as setting debounce time of the GPIO. To support this we introduce a new function pinctrl_gpio_set_config() that can be used by gpiolib based driver to pass configuration requests to the backing pinctrl driver. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
133 lines
3.3 KiB
C
133 lines
3.3 KiB
C
/*
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* Internal interface between the core pin control system and the
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* pin config 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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* License terms: GNU General Public License (GPL) version 2
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*/
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#ifdef CONFIG_PINCONF
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int pinconf_check_ops(struct pinctrl_dev *pctldev);
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int pinconf_validate_map(struct pinctrl_map const *map, int i);
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int pinconf_map_to_setting(struct pinctrl_map const *map,
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struct pinctrl_setting *setting);
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void pinconf_free_setting(struct pinctrl_setting const *setting);
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int pinconf_apply_setting(struct pinctrl_setting const *setting);
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int pinconf_set_config(struct pinctrl_dev *pctldev, unsigned pin,
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unsigned long *configs, size_t nconfigs);
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/*
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* You will only be interested in these if you're using PINCONF
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* so don't supply any stubs for these.
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*/
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int pin_config_get_for_pin(struct pinctrl_dev *pctldev, unsigned pin,
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unsigned long *config);
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int pin_config_group_get(const char *dev_name, const char *pin_group,
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unsigned long *config);
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#else
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static inline int pinconf_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 pinconf_validate_map(struct pinctrl_map const *map, int i)
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{
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return 0;
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}
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static inline int pinconf_map_to_setting(struct pinctrl_map const *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 pinconf_free_setting(struct pinctrl_setting const *setting)
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{
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}
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static inline int pinconf_apply_setting(struct pinctrl_setting const *setting)
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{
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return 0;
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}
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static inline int pinconf_set_config(struct pinctrl_dev *pctldev, unsigned pin,
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unsigned long *configs, size_t nconfigs)
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{
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return -ENOTSUPP;
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}
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#endif
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#if defined(CONFIG_PINCONF) && defined(CONFIG_DEBUG_FS)
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void pinconf_show_map(struct seq_file *s, struct pinctrl_map const *map);
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void pinconf_show_setting(struct seq_file *s,
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struct pinctrl_setting const *setting);
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void pinconf_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 pinconf_show_map(struct seq_file *s,
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struct pinctrl_map const *map)
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{
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}
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static inline void pinconf_show_setting(struct seq_file *s,
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struct pinctrl_setting const *setting)
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{
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}
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static inline void pinconf_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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/*
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* The following functions are available if the driver uses the generic
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* pin config.
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*/
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#if defined(CONFIG_GENERIC_PINCONF) && defined(CONFIG_DEBUG_FS)
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void pinconf_generic_dump_pins(struct pinctrl_dev *pctldev,
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struct seq_file *s, const char *gname,
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unsigned pin);
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void pinconf_generic_dump_config(struct pinctrl_dev *pctldev,
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struct seq_file *s, unsigned long config);
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#else
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static inline void pinconf_generic_dump_pins(struct pinctrl_dev *pctldev,
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struct seq_file *s,
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const char *gname, unsigned pin)
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{
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return;
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}
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static inline void pinconf_generic_dump_config(struct pinctrl_dev *pctldev,
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struct seq_file *s,
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unsigned long config)
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{
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return;
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}
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#endif
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#if defined(CONFIG_GENERIC_PINCONF) && defined(CONFIG_OF)
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int pinconf_generic_parse_dt_config(struct device_node *np,
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struct pinctrl_dev *pctldev,
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unsigned long **configs,
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unsigned int *nconfigs);
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#endif
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