u-boot/include/pwm.h
Simon Glass 401d1c4f5d common: Drop asm/global_data.h from common header
Move this out of the common header and include it only where needed.  In
a number of cases this requires adding "struct udevice;" to avoid adding
another large header or in other cases replacing / adding missing header
files that had been pulled in, very indirectly.   Finally, we have a few
cases where we did not need to include <asm/global_data.h> at all, so
remove that include.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Rini <trini@konsulko.com>
2021-02-02 15:33:42 -05:00

91 lines
2.4 KiB
C

/* SPDX-License-Identifier: GPL-2.0+ */
/*
* header file for pwm driver.
*
* Copyright 2016 Google Inc.
* Copyright (c) 2011 samsung electronics
* Donghwa Lee <dh09.lee@samsung.com>
*/
#ifndef _pwm_h_
#define _pwm_h_
struct udevice;
/* 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);
/**
* set_invert() - Set the PWM invert
*
* @dev: PWM device to update
* @channel: PWM channel to update
* @polarity: true to invert, false to keep normal polarity
* @return 0 if OK, -ve on error
*/
int (*set_invert)(struct udevice *dev, uint channel, bool polarity);
};
#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);
/**
* pwm_set_invert() - Set pwm default polarity
*
* @dev: PWM device to update
* @channel: PWM channel to update
* @polarity: true to invert, false to keep normal polarity
* @return 0 if OK, -ve on error
*/
int pwm_set_invert(struct udevice *dev, uint channel, bool polarity);
/* 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_ */