sandbox_pwm.c
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/*
* Copyright (c) 2015 Google, Inc
* Written by Simon Glass <sjg@chromium.org>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <dm.h>
#include <errno.h>
#include <pwm.h>
#include <asm/test.h>
DECLARE_GLOBAL_DATA_PTR;
enum {
NUM_CHANNELS = 3,
};
struct sandbox_pwm_chan {
uint period_ns;
uint duty_ns;
bool enable;
bool polarity;
};
struct sandbox_pwm_priv {
struct sandbox_pwm_chan chan[NUM_CHANNELS];
};
static int sandbox_pwm_set_config(struct udevice *dev, uint channel,
uint period_ns, uint duty_ns)
{
struct sandbox_pwm_priv *priv = dev_get_priv(dev);
struct sandbox_pwm_chan *chan;
if (channel >= NUM_CHANNELS)
return -ENOSPC;
chan = &priv->chan[channel];
chan->period_ns = period_ns;
chan->duty_ns = duty_ns;
return 0;
}
static int sandbox_pwm_set_enable(struct udevice *dev, uint channel,
bool enable)
{
struct sandbox_pwm_priv *priv = dev_get_priv(dev);
struct sandbox_pwm_chan *chan;
if (channel >= NUM_CHANNELS)
return -ENOSPC;
chan = &priv->chan[channel];
chan->enable = enable;
return 0;
}
static int sandbox_pwm_set_invert(struct udevice *dev, uint channel,
bool polarity)
{
struct sandbox_pwm_priv *priv = dev_get_priv(dev);
struct sandbox_pwm_chan *chan;
if (channel >= NUM_CHANNELS)
return -ENOSPC;
chan = &priv->chan[channel];
chan->polarity = polarity;
return 0;
}
static const struct pwm_ops sandbox_pwm_ops = {
.set_config = sandbox_pwm_set_config,
.set_enable = sandbox_pwm_set_enable,
.set_invert = sandbox_pwm_set_invert,
};
static const struct udevice_id sandbox_pwm_ids[] = {
{ .compatible = "sandbox,pwm" },
{ }
};
U_BOOT_DRIVER(warm_pwm_sandbox) = {
.name = "pwm_sandbox",
.id = UCLASS_PWM,
.of_match = sandbox_pwm_ids,
.ops = &sandbox_pwm_ops,
.priv_auto_alloc_size = sizeof(struct sandbox_pwm_priv),
};