xref: /openbmc/u-boot/include/pwm.h (revision d473f0c6)
1 /*
2  * header file for pwm driver.
3  *
4  * Copyright 2016 Google Inc.
5  * Copyright (c) 2011 samsung electronics
6  * Donghwa Lee <dh09.lee@samsung.com>
7  *
8  * SPDX-License-Identifier:	GPL-2.0+
9  */
10 
11 #ifndef _pwm_h_
12 #define _pwm_h_
13 
14 /* struct pwm_ops: Operations for the PWM uclass */
15 struct pwm_ops {
16 	/**
17 	 * set_config() - Set the PWM configuration
18 	 *
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
24 	 */
25 	int (*set_config)(struct udevice *dev, uint channel, uint period_ns,
26 			  uint duty_ns);
27 
28 	/**
29 	 * set_enable() - Enable or disable the PWM
30 	 *
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
35 	 */
36 	int (*set_enable)(struct udevice *dev, uint channel, bool enable);
37 };
38 
39 #define pwm_get_ops(dev)	((struct pwm_ops *)(dev)->driver->ops)
40 
41 /**
42  * pwm_set_config() - Set the PWM configuration
43  *
44  * @dev:	PWM device to update
45  * @channel:	PWM channel to update
46  * @period_ns:	PWM period in nanoseconds
47  * @duty_ns:	PWM duty period in nanoseconds
48  * @return 0 if OK, -ve on error
49  */
50 int pwm_set_config(struct udevice *dev, uint channel, uint period_ns,
51 		   uint duty_ns);
52 
53 /**
54  * pwm_set_enable() - Enable or disable the PWM
55  *
56  * @dev:	PWM device to update
57  * @channel:	PWM channel to update
58  * @enable:	true to enable, false to disable
59  * @return 0 if OK, -ve on error
60  */
61 int pwm_set_enable(struct udevice *dev, uint channel, bool enable);
62 
63 /* Legacy interface */
64 #ifndef CONFIG_DM_PWM
65 int	pwm_init		(int pwm_id, int div, int invert);
66 int	pwm_config		(int pwm_id, int duty_ns, int period_ns);
67 int	pwm_enable		(int pwm_id);
68 void	pwm_disable		(int pwm_id);
69 #endif
70 
71 #endif /* _pwm_h_ */
72