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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __LINUX_GPIO_SHARED_H
#define __LINUX_GPIO_SHARED_H
#include <linux/mutex.h>
struct gpio_device;
struct gpio_desc;
struct device;
struct fwnode_handle;
#if IS_ENABLED(CONFIG_GPIO_SHARED)
int gpiochip_setup_shared(struct gpio_chip *gc);
void gpio_device_teardown_shared(struct gpio_device *gdev);
int gpio_shared_add_proxy_lookup(struct device *consumer,
struct fwnode_handle *fwnode,
const char *con_id, unsigned long lflags);
#else
static inline int gpiochip_setup_shared(struct gpio_chip *gc)
{
return 0;
}
static inline void gpio_device_teardown_shared(struct gpio_device *gdev) { }
static inline int gpio_shared_add_proxy_lookup(struct device *consumer,
struct fwnode_handle *fwnode,
const char *con_id,
unsigned long lflags)
{
return 0;
}
#endif /* CONFIG_GPIO_SHARED */
struct gpio_shared_desc {
struct gpio_desc *desc;
unsigned long cfg;
unsigned int usecnt;
unsigned int highcnt;
struct mutex mutex; /* serializes all proxy operations on this descriptor */
};
struct gpio_shared_desc *devm_gpiod_shared_get(struct device *dev);
#endif /* __LINUX_GPIO_SHARED_H */
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