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Tom Rini83d290c2018-05-06 17:58:06 -04001/* SPDX-License-Identifier: GPL-2.0+ */
Donghwa Lee3f129282011-03-07 21:11:42 +00002/*
3 * header file for pwm driver.
4 *
Simon Glassfc760cb2016-01-21 19:44:54 -07005 * Copyright 2016 Google Inc.
Donghwa Lee3f129282011-03-07 21:11:42 +00006 * Copyright (c) 2011 samsung electronics
7 * Donghwa Lee <dh09.lee@samsung.com>
Donghwa Lee3f129282011-03-07 21:11:42 +00008 */
9
10#ifndef _pwm_h_
11#define _pwm_h_
12
Simon Glass401d1c42020-10-30 21:38:53 -060013struct udevice;
14
Simon Glassfc760cb2016-01-21 19:44:54 -070015/* struct pwm_ops: Operations for the PWM uclass */
16struct pwm_ops {
17 /**
18 * set_config() - Set the PWM configuration
19 *
Alper Nebi Yasakfefa7132020-10-22 23:49:26 +030020 * 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.
23 *
Simon Glassfc760cb2016-01-21 19:44:54 -070024 * @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
29 */
30 int (*set_config)(struct udevice *dev, uint channel, uint period_ns,
31 uint duty_ns);
32
33 /**
34 * set_enable() - Enable or disable the PWM
35 *
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
40 */
41 int (*set_enable)(struct udevice *dev, uint channel, bool enable);
Kever Yang0b601112017-04-24 10:27:49 +080042 /**
43 * set_invert() - Set the PWM invert
44 *
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
49 */
50 int (*set_invert)(struct udevice *dev, uint channel, bool polarity);
Simon Glassfc760cb2016-01-21 19:44:54 -070051};
52
53#define pwm_get_ops(dev) ((struct pwm_ops *)(dev)->driver->ops)
54
55/**
56 * pwm_set_config() - Set the PWM configuration
57 *
Alper Nebi Yasakfefa7132020-10-22 23:49:26 +030058 * 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.
61 *
Simon Glassfc760cb2016-01-21 19:44:54 -070062 * @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
67 */
68int pwm_set_config(struct udevice *dev, uint channel, uint period_ns,
69 uint duty_ns);
70
71/**
72 * pwm_set_enable() - Enable or disable the PWM
73 *
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
78 */
79int pwm_set_enable(struct udevice *dev, uint channel, bool enable);
80
Kever Yang0b601112017-04-24 10:27:49 +080081/**
82 * pwm_set_invert() - Set pwm default polarity
83 *
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
88 */
89int pwm_set_invert(struct udevice *dev, uint channel, bool polarity);
90
Simon Glassfc760cb2016-01-21 19:44:54 -070091/* Legacy interface */
92#ifndef CONFIG_DM_PWM
Donghwa Lee3f129282011-03-07 21:11:42 +000093int pwm_init (int pwm_id, int div, int invert);
94int pwm_config (int pwm_id, int duty_ns, int period_ns);
95int pwm_enable (int pwm_id);
96void pwm_disable (int pwm_id);
Simon Glassfc760cb2016-01-21 19:44:54 -070097#endif
Donghwa Lee3f129282011-03-07 21:11:42 +000098
99#endif /* _pwm_h_ */