consumer.h

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/*
 * 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 <[email protected]>
 *
 * License terms: GNU General Public License (GPL) version 2
 */
#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 int pinctrl_request_gpio(unsigned gpio);
extern void pinctrl_free_gpio(unsigned gpio);
extern int pinctrl_gpio_direction_input(unsigned gpio);
extern int pinctrl_gpio_direction_output(unsigned gpio);

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);

#else /* !CONFIG_PINCTRL */

static inline int pinctrl_request_gpio(unsigned gpio)
{
    return 0;
}

static inline void pinctrl_free_gpio(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 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)
{
}

#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_PTR(PTR_ERR(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);
}

#ifdef CONFIG_PINCONF

extern int pin_config_get(const char *dev_name, const char *name,
              unsigned long *config);
extern int pin_config_set(const char *dev_name, const char *name,
              unsigned long config);
extern int pin_config_group_get(const char *dev_name,
                const char *pin_group,
                unsigned long *config);
extern int pin_config_group_set(const char *dev_name,
                const char *pin_group,
                unsigned long config);

#else

static inline int pin_config_get(const char *dev_name, const char *name,
                 unsigned long *config)
{
    return 0;
}

static inline int pin_config_set(const char *dev_name, const char *name,
                 unsigned long config)
{
    return 0;
}

static inline int pin_config_group_get(const char *dev_name,
                       const char *pin_group,
                       unsigned long *config)
{
    return 0;
}

static inline int pin_config_group_set(const char *dev_name,
                       const char *pin_group,
                       unsigned long config)
{
    return 0;
}

#endif

#endif /* __LINUX_PINCTRL_CONSUMER_H */