mirror of
https://github.com/smaeul/u-boot.git
synced 2025-11-04 14:00:19 +00:00
fc760cb8c4
Add a uclass that supports Pulse Width Modulation (PWM) devices. It provides methods to enable/disable and configure the device. Signed-off-by: Simon Glass <sjg@chromium.org>
72 lines
1.8 KiB
C
72 lines
1.8 KiB
C
/*
|
|
* header file for pwm driver.
|
|
*
|
|
* Copyright 2016 Google Inc.
|
|
* Copyright (c) 2011 samsung electronics
|
|
* Donghwa Lee <dh09.lee@samsung.com>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#ifndef _pwm_h_
|
|
#define _pwm_h_
|
|
|
|
/* struct pwm_ops: Operations for the PWM uclass */
|
|
struct pwm_ops {
|
|
/**
|
|
* set_config() - Set the PWM configuration
|
|
*
|
|
* @dev: PWM device to update
|
|
* @channel: PWM channel to update
|
|
* @period_ns: PWM period in nanoseconds
|
|
* @duty_ns: PWM duty period in nanoseconds
|
|
* @return 0 if OK, -ve on error
|
|
*/
|
|
int (*set_config)(struct udevice *dev, uint channel, uint period_ns,
|
|
uint duty_ns);
|
|
|
|
/**
|
|
* set_enable() - Enable or disable the PWM
|
|
*
|
|
* @dev: PWM device to update
|
|
* @channel: PWM channel to update
|
|
* @enable: true to enable, false to disable
|
|
* @return 0 if OK, -ve on error
|
|
*/
|
|
int (*set_enable)(struct udevice *dev, uint channel, bool enable);
|
|
};
|
|
|
|
#define pwm_get_ops(dev) ((struct pwm_ops *)(dev)->driver->ops)
|
|
|
|
/**
|
|
* pwm_set_config() - Set the PWM configuration
|
|
*
|
|
* @dev: PWM device to update
|
|
* @channel: PWM channel to update
|
|
* @period_ns: PWM period in nanoseconds
|
|
* @duty_ns: PWM duty period in nanoseconds
|
|
* @return 0 if OK, -ve on error
|
|
*/
|
|
int pwm_set_config(struct udevice *dev, uint channel, uint period_ns,
|
|
uint duty_ns);
|
|
|
|
/**
|
|
* pwm_set_enable() - Enable or disable the PWM
|
|
*
|
|
* @dev: PWM device to update
|
|
* @channel: PWM channel to update
|
|
* @enable: true to enable, false to disable
|
|
* @return 0 if OK, -ve on error
|
|
*/
|
|
int pwm_set_enable(struct udevice *dev, uint channel, bool enable);
|
|
|
|
/* Legacy interface */
|
|
#ifndef CONFIG_DM_PWM
|
|
int pwm_init (int pwm_id, int div, int invert);
|
|
int pwm_config (int pwm_id, int duty_ns, int period_ns);
|
|
int pwm_enable (int pwm_id);
|
|
void pwm_disable (int pwm_id);
|
|
#endif
|
|
|
|
#endif /* _pwm_h_ */
|