10 * pwm_request - request a PWM device
12 struct pwm_device *pwm_request(int pwm_id, const char *label);
15 * pwm_free - free a PWM device
17 void pwm_free(struct pwm_device *pwm);
20 * pwm_config - change a PWM device configuration
22 int pwm_config(struct pwm_device *pwm, int duty_ns, int period_ns);
25 * pwm_enable - start a PWM output toggling
27 int pwm_enable(struct pwm_device *pwm);
30 * pwm_disable - stop a PWM output toggling
32 void pwm_disable(struct pwm_device *pwm);
38 PWMF_REQUESTED = 1 << 0,
39 PWMF_ENABLED = 1 << 1,
47 struct pwm_chip *chip;
50 unsigned int period; /* in nanoseconds */
53 static inline void pwm_set_period(struct pwm_device *pwm, unsigned int period)
59 static inline unsigned int pwm_get_period(struct pwm_device *pwm)
61 return pwm ? pwm->period : 0;
65 * struct pwm_ops - PWM controller operations
66 * @request: optional hook for requesting a PWM
67 * @free: optional hook for freeing a PWM
68 * @config: configure duty cycles and period length for this PWM
69 * @enable: enable PWM output toggling
70 * @disable: disable PWM output toggling
71 * @dbg_show: optional routine to show contents in debugfs
72 * @owner: helps prevent removal of modules exporting active PWMs
75 int (*request)(struct pwm_chip *chip,
76 struct pwm_device *pwm);
77 void (*free)(struct pwm_chip *chip,
78 struct pwm_device *pwm);
79 int (*config)(struct pwm_chip *chip,
80 struct pwm_device *pwm,
81 int duty_ns, int period_ns);
82 int (*enable)(struct pwm_chip *chip,
83 struct pwm_device *pwm);
84 void (*disable)(struct pwm_chip *chip,
85 struct pwm_device *pwm);
86 #ifdef CONFIG_DEBUG_FS
87 void (*dbg_show)(struct pwm_chip *chip,
94 * struct pwm_chip - abstract a PWM controller
95 * @dev: device providing the PWMs
96 * @list: list node for internal use
97 * @ops: callbacks for this PWM controller
98 * @base: number of first PWM controlled by this chip
99 * @npwm: number of PWMs controlled by this chip
100 * @pwms: array of PWM devices allocated by the framework
104 struct list_head list;
105 const struct pwm_ops *ops;
109 struct pwm_device *pwms;
111 struct pwm_device * (*of_xlate)(struct pwm_chip *pc,
112 const struct of_phandle_args *args);
113 unsigned int of_pwm_n_cells;
116 int pwm_set_chip_data(struct pwm_device *pwm, void *data);
117 void *pwm_get_chip_data(struct pwm_device *pwm);
119 int pwmchip_add(struct pwm_chip *chip);
120 int pwmchip_remove(struct pwm_chip *chip);
121 struct pwm_device *pwm_request_from_chip(struct pwm_chip *chip,
125 struct pwm_device *pwm_get(struct device *dev, const char *consumer);
126 void pwm_put(struct pwm_device *pwm);
129 struct list_head list;
130 const char *provider;
136 #define PWM_LOOKUP(_provider, _index, _dev_id, _con_id) \
138 .provider = _provider, \
144 void pwm_add_table(struct pwm_lookup *table, size_t num);
148 #endif /* __LINUX_PWM_H */