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git.ipfire.org Git - people/ms/u-boot.git/blob - include/pwm.h
2 * header file for pwm driver.
4 * Copyright 2016 Google Inc.
5 * Copyright (c) 2011 samsung electronics
6 * Donghwa Lee <dh09.lee@samsung.com>
8 * SPDX-License-Identifier: GPL-2.0+
14 /* struct pwm_ops: Operations for the PWM uclass */
17 * set_config() - Set the PWM configuration
19 * @dev: PWM device to update
20 * @channel: PWM channel to update
21 * @period_ns: PWM period in nanoseconds
22 * @duty_ns: PWM duty period in nanoseconds
23 * @return 0 if OK, -ve on error
25 int (*set_config
)(struct udevice
*dev
, uint channel
, uint period_ns
,
29 * set_enable() - Enable or disable the PWM
31 * @dev: PWM device to update
32 * @channel: PWM channel to update
33 * @enable: true to enable, false to disable
34 * @return 0 if OK, -ve on error
36 int (*set_enable
)(struct udevice
*dev
, uint channel
, bool enable
);
38 * set_invert() - Set the PWM invert
40 * @dev: PWM device to update
41 * @channel: PWM channel to update
42 * @polarity: true to invert, false to keep normal polarity
43 * @return 0 if OK, -ve on error
45 int (*set_invert
)(struct udevice
*dev
, uint channel
, bool polarity
);
48 #define pwm_get_ops(dev) ((struct pwm_ops *)(dev)->driver->ops)
51 * pwm_set_config() - Set the PWM configuration
53 * @dev: PWM device to update
54 * @channel: PWM channel to update
55 * @period_ns: PWM period in nanoseconds
56 * @duty_ns: PWM duty period in nanoseconds
57 * @return 0 if OK, -ve on error
59 int pwm_set_config(struct udevice
*dev
, uint channel
, uint period_ns
,
63 * pwm_set_enable() - Enable or disable the PWM
65 * @dev: PWM device to update
66 * @channel: PWM channel to update
67 * @enable: true to enable, false to disable
68 * @return 0 if OK, -ve on error
70 int pwm_set_enable(struct udevice
*dev
, uint channel
, bool enable
);
73 * pwm_set_invert() - Set pwm default polarity
75 * @dev: PWM device to update
76 * @channel: PWM channel to update
77 * @polarity: true to invert, false to keep normal polarity
78 * @return 0 if OK, -ve on error
80 int pwm_set_invert(struct udevice
*dev
, uint channel
, bool polarity
);
82 /* Legacy interface */
84 int pwm_init (int pwm_id
, int div
, int invert
);
85 int pwm_config (int pwm_id
, int duty_ns
, int period_ns
);
86 int pwm_enable (int pwm_id
);
87 void pwm_disable (int pwm_id
);