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#ifndef __LINUX_PWM_H

#define __LINUX_PWM_H

#include 

#include 

//#include 

struct device;

struct pwm_device;

struct seq_file;

#if IS_ENABLED(CONFIG_PWM)

/*

 * pwm_request - request a PWM device

 */

struct pwm_device *pwm_request(int pwm_id, const char *label);

/*

 * pwm_free - free a PWM device

 */

void pwm_free(struct pwm_device *pwm);

/*

 * pwm_config - change a PWM device configuration

 */

int pwm_config(struct pwm_device *pwm, int duty_ns, int period_ns);

/*

 * pwm_enable - start a PWM output toggling

 */

int pwm_enable(struct pwm_device *pwm);

/*

 * pwm_disable - stop a PWM output toggling

 */

void pwm_disable(struct pwm_device *pwm);

#else

static inline struct pwm_device *pwm_request(int pwm_id, const char *label)

{

	return ERR_PTR(-ENODEV);

}

static inline void pwm_free(struct pwm_device *pwm)

{

}

static inline int pwm_config(struct pwm_device *pwm, int duty_ns, int period_ns)

{

	return -EINVAL;

}

static inline int pwm_enable(struct pwm_device *pwm)

{

	return -EINVAL;

}

static inline void pwm_disable(struct pwm_device *pwm)

{

}

#endif

struct pwm_chip;

/**

 * enum pwm_polarity - polarity of a PWM signal

 * @PWM_POLARITY_NORMAL: a high signal for the duration of the duty-

 * cycle, followed by a low signal for the remainder of the pulse

 * period

 * @PWM_POLARITY_INVERSED: a low signal for the duration of the duty-

 * cycle, followed by a high signal for the remainder of the pulse

 * period

 */

enum pwm_polarity {

	PWM_POLARITY_NORMAL,

	PWM_POLARITY_INVERSED,

};

enum {

	PWMF_REQUESTED = 1 << 0,

	PWMF_ENABLED = 1 << 1,

	PWMF_EXPORTED = 1 << 2,

};

/**

 * struct pwm_device - PWM channel object

 * @label: name of the PWM device

 * @flags: flags associated with the PWM device

 * @hwpwm: per-chip relative index of the PWM device

 * @pwm: global index of the PWM device

 * @chip: PWM chip providing this PWM device

 * @chip_data: chip-private data associated with the PWM device

 * @lock: used to serialize accesses to the PWM device where necessary

 * @period: period of the PWM signal (in nanoseconds)

 * @duty_cycle: duty cycle of the PWM signal (in nanoseconds)

 * @polarity: polarity of the PWM signal

 */

struct pwm_device {

	const char *label;

	unsigned long flags;

	unsigned int hwpwm;

	unsigned int pwm;

	struct pwm_chip *chip;

	void *chip_data;

	struct mutex lock;

	unsigned int period;

	unsigned int duty_cycle;

	enum pwm_polarity polarity;

};

static inline bool pwm_is_enabled(const struct pwm_device *pwm)

{

	return test_bit(PWMF_ENABLED, &pwm->flags);

}

static inline void pwm_set_period(struct pwm_device *pwm, unsigned int period)

{

	if (pwm)

		pwm->period = period;

}

static inline unsigned int pwm_get_period(const struct pwm_device *pwm)

{

	return pwm ? pwm->period : 0;

}

static inline void pwm_set_duty_cycle(struct pwm_device *pwm, unsigned int duty)

{

	if (pwm)

		pwm->duty_cycle = duty;

}

static inline unsigned int pwm_get_duty_cycle(const struct pwm_device *pwm)

{

	return pwm ? pwm->duty_cycle : 0;

}

/*

 * pwm_set_polarity - configure the polarity of a PWM signal

 */

int pwm_set_polarity(struct pwm_device *pwm, enum pwm_polarity polarity);

static inline enum pwm_polarity pwm_get_polarity(const struct pwm_device *pwm)

{

	return pwm ? pwm->polarity : PWM_POLARITY_NORMAL;

}

/**

 * struct pwm_ops - PWM controller operations

 * @request: optional hook for requesting a PWM

 * @free: optional hook for freeing a PWM

 * @config: configure duty cycles and period length for this PWM

 * @set_polarity: configure the polarity of this PWM

 * @enable: enable PWM output toggling

 * @disable: disable PWM output toggling

 * @dbg_show: optional routine to show contents in debugfs

 * @owner: helps prevent removal of modules exporting active PWMs

 */

struct pwm_ops {

	int (*request)(struct pwm_chip *chip, struct pwm_device *pwm);

	void (*free)(struct pwm_chip *chip, struct pwm_device *pwm);

	int (*config)(struct pwm_chip *chip, struct pwm_device *pwm,

		      int duty_ns, int period_ns);

	int (*set_polarity)(struct pwm_chip *chip, struct pwm_device *pwm,

			    enum pwm_polarity polarity);

	int (*enable)(struct pwm_chip *chip, struct pwm_device *pwm);

	void (*disable)(struct pwm_chip *chip, struct pwm_device *pwm);

#ifdef CONFIG_DEBUG_FS

	void (*dbg_show)(struct pwm_chip *chip, struct seq_file *s);

#endif

	struct module *owner;

};

#if IS_ENABLED(CONFIG_PWM)

int pwm_set_chip_data(struct pwm_device *pwm, void *data);

void *pwm_get_chip_data(struct pwm_device *pwm);

struct pwm_device *pwm_get(struct device *dev, const char *con_id);

struct pwm_device *of_pwm_get(struct device_node *np, const char *con_id);

void pwm_put(struct pwm_device *pwm);

struct pwm_device *devm_pwm_get(struct device *dev, const char *con_id);

struct pwm_device *devm_of_pwm_get(struct device *dev, struct device_node *np,

				   const char *con_id);

void devm_pwm_put(struct device *dev, struct pwm_device *pwm);

bool pwm_can_sleep(struct pwm_device *pwm);

#else

static inline int pwm_set_chip_data(struct pwm_device *pwm, void *data)

{

	return -EINVAL;

}

static inline void *pwm_get_chip_data(struct pwm_device *pwm)

{

	return NULL;

}

static inline int pwmchip_add(struct pwm_chip *chip)

{

	return -EINVAL;

}

static inline int pwmchip_add_inversed(struct pwm_chip *chip)

{

	return -EINVAL;

}

static inline int pwmchip_remove(struct pwm_chip *chip)

{

	return -EINVAL;

}

static inline struct pwm_device *pwm_request_from_chip(struct pwm_chip *chip,

						       unsigned int index,

						       const char *label)

{

	return ERR_PTR(-ENODEV);

}

static inline struct pwm_device *pwm_get(struct device *dev,

					 const char *consumer)

{

	return ERR_PTR(-ENODEV);

}

static inline void pwm_put(struct pwm_device *pwm)

{

}

static inline struct pwm_device *devm_pwm_get(struct device *dev,

					      const char *consumer)

{

	return ERR_PTR(-ENODEV);

}

static inline void devm_pwm_put(struct device *dev, struct pwm_device *pwm)

{

}

static inline bool pwm_can_sleep(struct pwm_device *pwm)

{

	return false;

}

#endif

#endif /* __LINUX_PWM_H */