/*
* 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);

#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 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)
{
}

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_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);
}

#endif /* __LINUX_PINCTRL_CONSUMER_H */