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dm: pwm: Add a PWM uclass

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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>
This commit is contained in:
Simon Glass 2016-01-21 19:44:54 -07:00
parent d4bf91ada1
commit fc760cb8c4
6 changed files with 103 additions and 0 deletions
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36
drivers/pwm/pwm-uclass.c Normal file
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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",
};