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>
15 /* struct pwm_ops: Operations for the PWM uclass */
18 * set_config() - Set the PWM configuration
20 * Change both the PWM device's period and it's duty period if
21 * possible. Otherwise, set an appropriate duty period that best
22 * matches the given period_ns / duty_ns ratio for the device.
24 * @dev: PWM device to update
25 * @channel: PWM channel to update
26 * @period_ns: PWM period in nanoseconds
27 * @duty_ns: PWM duty period in nanoseconds
28 * @return 0 if OK, -ve on error
30 int (*set_config)(struct udevice *dev, uint channel, uint period_ns,
34 * set_enable() - Enable or disable the PWM
36 * @dev: PWM device to update
37 * @channel: PWM channel to update
38 * @enable: true to enable, false to disable
39 * @return 0 if OK, -ve on error
41 int (*set_enable)(struct udevice *dev, uint channel, bool enable);
43 * set_invert() - Set the PWM invert
45 * @dev: PWM device to update
46 * @channel: PWM channel to update
47 * @polarity: true to invert, false to keep normal polarity
48 * @return 0 if OK, -ve on error
50 int (*set_invert)(struct udevice *dev, uint channel, bool polarity);
53 #define pwm_get_ops(dev) ((struct pwm_ops *)(dev)->driver->ops)
56 * pwm_set_config() - Set the PWM configuration
58 * Change both the PWM device's period and it's duty period if
59 * possible. Otherwise, set an appropriate duty period that best
60 * matches the given period_ns / duty_ns ratio for the device.
62 * @dev: PWM device to update
63 * @channel: PWM channel to update
64 * @period_ns: PWM period in nanoseconds
65 * @duty_ns: PWM duty period in nanoseconds
66 * Return: 0 if OK, -ve on error
68 int pwm_set_config(struct udevice *dev, uint channel, uint period_ns,
72 * pwm_set_enable() - Enable or disable the PWM
74 * @dev: PWM device to update
75 * @channel: PWM channel to update
76 * @enable: true to enable, false to disable
77 * Return: 0 if OK, -ve on error
79 int pwm_set_enable(struct udevice *dev, uint channel, bool enable);
82 * pwm_set_invert() - Set pwm default polarity
84 * @dev: PWM device to update
85 * @channel: PWM channel to update
86 * @polarity: true to invert, false to keep normal polarity
87 * Return: 0 if OK, -ve on error
89 int pwm_set_invert(struct udevice *dev, uint channel, bool polarity);
91 /* Legacy interface */
93 int pwm_init (int pwm_id, int div, int invert);
94 int pwm_config (int pwm_id, int duty_ns, int period_ns);
95 int pwm_enable (int pwm_id);
96 void pwm_disable (int pwm_id);