196 строки
4.1 KiB
C
196 строки
4.1 KiB
C
/*
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* Consumer interface the pin control subsystem
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*
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* Copyright (C) 2012 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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#ifndef __LINUX_PINCTRL_CONSUMER_H
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#define __LINUX_PINCTRL_CONSUMER_H
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#include <linux/err.h>
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#include <linux/list.h>
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#include <linux/seq_file.h>
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#include <linux/pinctrl/pinctrl-state.h>
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/* This struct is private to the core and should be regarded as a cookie */
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struct pinctrl;
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struct pinctrl_state;
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struct device;
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#ifdef CONFIG_PINCTRL
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/* External interface to pin control */
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extern int pinctrl_request_gpio(unsigned gpio);
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extern void pinctrl_free_gpio(unsigned gpio);
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extern int pinctrl_gpio_direction_input(unsigned gpio);
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extern int pinctrl_gpio_direction_output(unsigned gpio);
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extern struct pinctrl * __must_check pinctrl_get(struct device *dev);
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extern void pinctrl_put(struct pinctrl *p);
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extern struct pinctrl_state * __must_check pinctrl_lookup_state(
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struct pinctrl *p,
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const char *name);
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extern int pinctrl_select_state(struct pinctrl *p, struct pinctrl_state *s);
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extern struct pinctrl * __must_check devm_pinctrl_get(struct device *dev);
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extern void devm_pinctrl_put(struct pinctrl *p);
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#ifdef CONFIG_PM
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extern int pinctrl_pm_select_default_state(struct device *dev);
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extern int pinctrl_pm_select_sleep_state(struct device *dev);
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extern int pinctrl_pm_select_idle_state(struct device *dev);
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#else
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static inline int pinctrl_pm_select_default_state(struct device *dev)
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{
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return 0;
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}
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static inline int pinctrl_pm_select_sleep_state(struct device *dev)
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{
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return 0;
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}
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static inline int pinctrl_pm_select_idle_state(struct device *dev)
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{
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return 0;
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}
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#endif
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#else /* !CONFIG_PINCTRL */
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static inline int pinctrl_request_gpio(unsigned gpio)
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{
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return 0;
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}
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static inline void pinctrl_free_gpio(unsigned gpio)
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{
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}
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static inline int pinctrl_gpio_direction_input(unsigned gpio)
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{
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return 0;
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}
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static inline int pinctrl_gpio_direction_output(unsigned gpio)
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{
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return 0;
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}
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static inline struct pinctrl * __must_check pinctrl_get(struct device *dev)
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{
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return NULL;
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}
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static inline void pinctrl_put(struct pinctrl *p)
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{
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}
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static inline struct pinctrl_state * __must_check pinctrl_lookup_state(
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struct pinctrl *p,
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const char *name)
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{
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return NULL;
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}
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static inline int pinctrl_select_state(struct pinctrl *p,
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struct pinctrl_state *s)
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{
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return 0;
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}
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static inline struct pinctrl * __must_check devm_pinctrl_get(struct device *dev)
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{
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return NULL;
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}
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static inline void devm_pinctrl_put(struct pinctrl *p)
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{
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}
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static inline int pinctrl_pm_select_default_state(struct device *dev)
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{
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return 0;
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}
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static inline int pinctrl_pm_select_sleep_state(struct device *dev)
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{
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return 0;
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}
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static inline int pinctrl_pm_select_idle_state(struct device *dev)
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{
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return 0;
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}
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#endif /* CONFIG_PINCTRL */
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static inline struct pinctrl * __must_check pinctrl_get_select(
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struct device *dev, const char *name)
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{
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struct pinctrl *p;
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struct pinctrl_state *s;
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int ret;
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p = pinctrl_get(dev);
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if (IS_ERR(p))
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return p;
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s = pinctrl_lookup_state(p, name);
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if (IS_ERR(s)) {
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pinctrl_put(p);
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return ERR_CAST(s);
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}
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ret = pinctrl_select_state(p, s);
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if (ret < 0) {
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pinctrl_put(p);
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return ERR_PTR(ret);
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}
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return p;
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}
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static inline struct pinctrl * __must_check pinctrl_get_select_default(
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struct device *dev)
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{
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return pinctrl_get_select(dev, PINCTRL_STATE_DEFAULT);
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}
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static inline struct pinctrl * __must_check devm_pinctrl_get_select(
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struct device *dev, const char *name)
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{
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struct pinctrl *p;
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struct pinctrl_state *s;
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int ret;
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p = devm_pinctrl_get(dev);
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if (IS_ERR(p))
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return p;
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s = pinctrl_lookup_state(p, name);
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if (IS_ERR(s)) {
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devm_pinctrl_put(p);
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return ERR_CAST(s);
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}
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ret = pinctrl_select_state(p, s);
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if (ret < 0) {
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devm_pinctrl_put(p);
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return ERR_PTR(ret);
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}
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return p;
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}
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static inline struct pinctrl * __must_check devm_pinctrl_get_select_default(
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struct device *dev)
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{
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return devm_pinctrl_get_select(dev, PINCTRL_STATE_DEFAULT);
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}
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#endif /* __LINUX_PINCTRL_CONSUMER_H */
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