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git.ipfire.org Git - thirdparty/u-boot.git/blob - include/pwm.h
1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * header file for pwm driver.
5 * Copyright 2016 Google Inc.
6 * Copyright (c) 2011 samsung electronics
7 * Donghwa Lee <dh09.lee@samsung.com>
13 /* struct pwm_ops: Operations for the PWM uclass */
16 * set_config() - Set the PWM configuration
18 * @dev: PWM device to update
19 * @channel: PWM channel to update
20 * @period_ns: PWM period in nanoseconds
21 * @duty_ns: PWM duty period in nanoseconds
22 * @return 0 if OK, -ve on error
24 int (*set_config
)(struct udevice
*dev
, uint channel
, uint period_ns
,
28 * set_enable() - Enable or disable the PWM
30 * @dev: PWM device to update
31 * @channel: PWM channel to update
32 * @enable: true to enable, false to disable
33 * @return 0 if OK, -ve on error
35 int (*set_enable
)(struct udevice
*dev
, uint channel
, bool enable
);
37 * set_invert() - Set the PWM invert
39 * @dev: PWM device to update
40 * @channel: PWM channel to update
41 * @polarity: true to invert, false to keep normal polarity
42 * @return 0 if OK, -ve on error
44 int (*set_invert
)(struct udevice
*dev
, uint channel
, bool polarity
);
47 #define pwm_get_ops(dev) ((struct pwm_ops *)(dev)->driver->ops)
50 * pwm_set_config() - Set the PWM configuration
52 * @dev: PWM device to update
53 * @channel: PWM channel to update
54 * @period_ns: PWM period in nanoseconds
55 * @duty_ns: PWM duty period in nanoseconds
56 * @return 0 if OK, -ve on error
58 int pwm_set_config(struct udevice
*dev
, uint channel
, uint period_ns
,
62 * pwm_set_enable() - Enable or disable the PWM
64 * @dev: PWM device to update
65 * @channel: PWM channel to update
66 * @enable: true to enable, false to disable
67 * @return 0 if OK, -ve on error
69 int pwm_set_enable(struct udevice
*dev
, uint channel
, bool enable
);
72 * pwm_set_invert() - Set pwm default polarity
74 * @dev: PWM device to update
75 * @channel: PWM channel to update
76 * @polarity: true to invert, false to keep normal polarity
77 * @return 0 if OK, -ve on error
79 int pwm_set_invert(struct udevice
*dev
, uint channel
, bool polarity
);
81 /* Legacy interface */
83 int pwm_init (int pwm_id
, int div
, int invert
);
84 int pwm_config (int pwm_id
, int duty_ns
, int period_ns
);
85 int pwm_enable (int pwm_id
);
86 void pwm_disable (int pwm_id
);