8 * pwm_request - request a PWM device
10 struct pwm_device
*pwm_request(int pwm_id
, const char *label
);
13 * pwm_free - free a PWM device
15 void pwm_free(struct pwm_device
*pwm
);
18 * pwm_config - change a PWM device configuration
20 int pwm_config(struct pwm_device
*pwm
, int duty_ns
, int period_ns
);
23 * pwm_enable - start a PWM output toggling
25 int pwm_enable(struct pwm_device
*pwm
);
28 * pwm_disable - stop a PWM output toggling
30 void pwm_disable(struct pwm_device
*pwm
);
36 PWMF_REQUESTED
= 1 << 0,
37 PWMF_ENABLED
= 1 << 1,
45 struct pwm_chip
*chip
;
48 unsigned int period
; /* in nanoseconds */
51 static inline void pwm_set_period(struct pwm_device
*pwm
, unsigned int period
)
57 static inline unsigned int pwm_get_period(struct pwm_device
*pwm
)
59 return pwm
? pwm
->period
: 0;
63 * struct pwm_ops - PWM controller operations
64 * @request: optional hook for requesting a PWM
65 * @free: optional hook for freeing a PWM
66 * @config: configure duty cycles and period length for this PWM
67 * @enable: enable PWM output toggling
68 * @disable: disable PWM output toggling
69 * @dbg_show: optional routine to show contents in debugfs
70 * @owner: helps prevent removal of modules exporting active PWMs
73 int (*request
)(struct pwm_chip
*chip
,
74 struct pwm_device
*pwm
);
75 void (*free
)(struct pwm_chip
*chip
,
76 struct pwm_device
*pwm
);
77 int (*config
)(struct pwm_chip
*chip
,
78 struct pwm_device
*pwm
,
79 int duty_ns
, int period_ns
);
80 int (*enable
)(struct pwm_chip
*chip
,
81 struct pwm_device
*pwm
);
82 void (*disable
)(struct pwm_chip
*chip
,
83 struct pwm_device
*pwm
);
84 #ifdef CONFIG_DEBUG_FS
85 void (*dbg_show
)(struct pwm_chip
*chip
,
92 * struct pwm_chip - abstract a PWM controller
93 * @dev: device providing the PWMs
94 * @list: list node for internal use
95 * @ops: callbacks for this PWM controller
96 * @base: number of first PWM controlled by this chip
97 * @npwm: number of PWMs controlled by this chip
98 * @pwms: array of PWM devices allocated by the framework
102 struct list_head list
;
103 const struct pwm_ops
*ops
;
107 struct pwm_device
*pwms
;
110 int pwm_set_chip_data(struct pwm_device
*pwm
, void *data
);
111 void *pwm_get_chip_data(struct pwm_device
*pwm
);
113 int pwmchip_add(struct pwm_chip
*chip
);
114 int pwmchip_remove(struct pwm_chip
*chip
);
115 struct pwm_device
*pwm_request_from_chip(struct pwm_chip
*chip
,
120 #endif /* __LINUX_PWM_H */