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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>
71 lines
1.8 KiB
C
71 lines
1.8 KiB
C
/*
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* header file for pwm driver.
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*
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* Copyright 2016 Google Inc.
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* Copyright (c) 2011 samsung electronics
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* Donghwa Lee <dh09.lee@samsung.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#ifndef _pwm_h_
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#define _pwm_h_
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/* struct pwm_ops: Operations for the PWM uclass */
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struct pwm_ops {
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/**
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* set_config() - Set the PWM configuration
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*
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* @dev: PWM device to update
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* @channel: PWM channel to update
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* @period_ns: PWM period in nanoseconds
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* @duty_ns: PWM duty period in nanoseconds
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* @return 0 if OK, -ve on error
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*/
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int (*set_config)(struct udevice *dev, uint channel, uint period_ns,
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uint duty_ns);
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/**
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* set_enable() - Enable or disable the PWM
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*
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* @dev: PWM device to update
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* @channel: PWM channel to update
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* @enable: true to enable, false to disable
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* @return 0 if OK, -ve on error
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*/
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int (*set_enable)(struct udevice *dev, uint channel, bool enable);
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};
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#define pwm_get_ops(dev) ((struct pwm_ops *)(dev)->driver->ops)
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/**
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* pwm_set_config() - Set the PWM configuration
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*
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* @dev: PWM device to update
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* @channel: PWM channel to update
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* @period_ns: PWM period in nanoseconds
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* @duty_ns: PWM duty period in nanoseconds
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* @return 0 if OK, -ve on error
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*/
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int pwm_set_config(struct udevice *dev, uint channel, uint period_ns,
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uint duty_ns);
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/**
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* pwm_set_enable() - Enable or disable the PWM
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*
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* @dev: PWM device to update
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* @channel: PWM channel to update
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* @enable: true to enable, false to disable
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* @return 0 if OK, -ve on error
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*/
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int pwm_set_enable(struct udevice *dev, uint channel, bool enable);
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/* Legacy interface */
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#ifndef CONFIG_DM_PWM
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int pwm_init (int pwm_id, int div, int invert);
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int pwm_config (int pwm_id, int duty_ns, int period_ns);
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int pwm_enable (int pwm_id);
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void pwm_disable (int pwm_id);
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#endif
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#endif /* _pwm_h_ */
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