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/* SPDX-License-Identifier: GPL-2.0-only */ /* * Consumer interface the pin control subsystem * * Copyright (C) 2012 ST-Ericsson SA * Written on behalf of Linaro for ST-Ericsson * Based on bits of regulator core, gpio core and clk core * * Author: Linus Walleij <linus.walleij@linaro.org> */ #ifndef __LINUX_PINCTRL_CONSUMER_H #define __LINUX_PINCTRL_CONSUMER_H #include <linux/err.h> #include <linux/list.h> #include <linux/seq_file.h> #include <linux/pinctrl/pinctrl-state.h> /* This struct is private to the core and should be regarded as a cookie */ struct pinctrl; struct pinctrl_state; struct device; #ifdef CONFIG_PINCTRL /* External interface to pin control */ extern bool pinctrl_gpio_can_use_line(unsigned gpio); extern int pinctrl_gpio_request(unsigned gpio); extern void pinctrl_gpio_free(unsigned gpio); extern int pinctrl_gpio_direction_input(unsigned gpio); extern int pinctrl_gpio_direction_output(unsigned gpio); extern int pinctrl_gpio_set_config(unsigned gpio, unsigned long config); extern struct pinctrl * __must_check pinctrl_get(struct device *dev); extern void pinctrl_put(struct pinctrl *p); extern struct pinctrl_state * __must_check pinctrl_lookup_state( struct pinctrl *p, const char *name); extern int pinctrl_select_state(struct pinctrl *p, struct pinctrl_state *s); extern struct pinctrl * __must_check devm_pinctrl_get(struct device *dev); extern void devm_pinctrl_put(struct pinctrl *p); #ifdef CONFIG_PM extern int pinctrl_pm_select_default_state(struct device *dev); extern int pinctrl_pm_select_sleep_state(struct device *dev); extern int pinctrl_pm_select_idle_state(struct device *dev); #else static inline int pinctrl_pm_select_default_state(struct device *dev) { return 0; } static inline int pinctrl_pm_select_sleep_state(struct device *dev) { return 0; } static inline int pinctrl_pm_select_idle_state(struct device *dev) { return 0; } #endif #else /* !CONFIG_PINCTRL */ static inline bool pinctrl_gpio_can_use_line(unsigned gpio) { return true; } static inline int pinctrl_gpio_request(unsigned gpio) { return 0; } static inline void pinctrl_gpio_free(unsigned gpio) { } static inline int pinctrl_gpio_direction_input(unsigned gpio) { return 0; } static inline int pinctrl_gpio_direction_output(unsigned gpio) { return 0; } static inline int pinctrl_gpio_set_config(unsigned gpio, unsigned long config) { return 0; } static inline struct pinctrl * __must_check pinctrl_get(struct device *dev) { return NULL; } static inline void pinctrl_put(struct pinctrl *p) { } static inline struct pinctrl_state * __must_check pinctrl_lookup_state( struct pinctrl *p, const char *name) { return NULL; } static inline int pinctrl_select_state(struct pinctrl *p, struct pinctrl_state *s) { return 0; } static inline struct pinctrl * __must_check devm_pinctrl_get(struct device *dev) { return NULL; } static inline void devm_pinctrl_put(struct pinctrl *p) { } static inline int pinctrl_pm_select_default_state(struct device *dev) { return 0; } static inline int pinctrl_pm_select_sleep_state(struct device *dev) { return 0; } static inline int pinctrl_pm_select_idle_state(struct device *dev) { return 0; } #endif /* CONFIG_PINCTRL */ static inline struct pinctrl * __must_check pinctrl_get_select( struct device *dev, const char *name) { struct pinctrl *p; struct pinctrl_state *s; int ret; p = pinctrl_get(dev); if (IS_ERR(p)) return p; s = pinctrl_lookup_state(p, name); if (IS_ERR(s)) { pinctrl_put(p); return ERR_CAST(s); } ret = pinctrl_select_state(p, s); if (ret < 0) { pinctrl_put(p); return ERR_PTR(ret); } return p; } static inline struct pinctrl * __must_check pinctrl_get_select_default( struct device *dev) { return pinctrl_get_select(dev, PINCTRL_STATE_DEFAULT); } static inline struct pinctrl * __must_check devm_pinctrl_get_select( struct device *dev, const char *name) { struct pinctrl *p; struct pinctrl_state *s; int ret; p = devm_pinctrl_get(dev); if (IS_ERR(p)) return p; s = pinctrl_lookup_state(p, name); if (IS_ERR(s)) { devm_pinctrl_put(p); return ERR_CAST(s); } ret = pinctrl_select_state(p, s); if (ret < 0) { devm_pinctrl_put(p); return ERR_PTR(ret); } return p; } static inline struct pinctrl * __must_check devm_pinctrl_get_select_default( struct device *dev) { return devm_pinctrl_get_select(dev, PINCTRL_STATE_DEFAULT); } #endif /* __LINUX_PINCTRL_CONSUMER_H */
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