mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-28 20:02:17 +00:00
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>
201 lines
4.3 KiB
C
201 lines
4.3 KiB
C
/*
|
|
* 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>
|
|
*
|
|
* 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 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 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 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 */
|