+/* 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>
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
#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
*
+ * Change both the PWM device's period and it's duty period if
+ * possible. Otherwise, set an appropriate duty period that best
+ * matches the given period_ns / duty_ns ratio for the device.
+ *
* @dev: PWM device to update
* @channel: PWM channel to update
* @period_ns: PWM period in nanoseconds
* @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
*
+ * Change both the PWM device's period and it's duty period if
+ * possible. Otherwise, set an appropriate duty period that best
+ * matches the given period_ns / duty_ns ratio for the device.
+ *
* @dev: PWM device to update
* @channel: PWM channel to update
* @period_ns: PWM period in nanoseconds
*/
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);