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    /*
     * Copyright (c) 2016 Google, Inc
     * Written by Simon Glass <sjg@chromium.org>
     *
     * SPDX-License-Identifier:	GPL-2.0+
     */
    
    #include <common.h>
    #include <dm.h>
    #include <pwm.h>
    
    int pwm_set_config(struct udevice *dev, uint channel, uint period_ns,
    		   uint duty_ns)
    {
    	struct pwm_ops *ops = pwm_get_ops(dev);
    
    	if (!ops->set_config)
    		return -ENOSYS;
    
    	return ops->set_config(dev, channel, period_ns, duty_ns);
    }
    
    int pwm_set_enable(struct udevice *dev, uint channel, bool enable)
    {
    	struct pwm_ops *ops = pwm_get_ops(dev);
    
    	if (!ops->set_enable)
    		return -ENOSYS;
    
    	return ops->set_enable(dev, channel, enable);
    }
    
    UCLASS_DRIVER(pwm) = {
    	.id		= UCLASS_PWM,
    	.name		= "pwm",
    };