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#ifndef __LINUX_PWM_H
#define __LINUX_PWM_H
struct pwm_device;
/*
* 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);
#ifdef CONFIG_PWM
struct pwm_chip;
/**
* 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
* @enable: enable PWM output toggling
* @disable: disable PWM output toggling
* @owner: helps prevent removal of modules exporting active PWMs
*/
struct pwm_ops {
int (*request)(struct pwm_chip *chip);
void (*free)(struct pwm_chip *chip);
int (*config)(struct pwm_chip *chip, int duty_ns,
int period_ns);
int (*enable)(struct pwm_chip *chip);
void (*disable)(struct pwm_chip *chip);
struct module *owner;
};
/**
* struct pwm_chip - abstract a PWM
* @pwm_id: global PWM device index
* @label: PWM device label
* @ops: controller operations
*/
struct pwm_chip {
int pwm_id;
const char *label;
struct pwm_ops *ops;
};
int pwmchip_add(struct pwm_chip *chip);
int pwmchip_remove(struct pwm_chip *chip);
#endif
#endif /* __LINUX_PWM_H */
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