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// SPDX-License-Identifier: GPL-2.0+
#include <common.h>
#include <cros_ec.h>
#include <dm.h>
#include <errno.h>
#include <log.h>
#include <pwm.h>
struct cros_ec_pwm_priv {
bool enabled;
uint duty;
};
static int cros_ec_pwm_set_config(struct udevice *dev, uint channel,
uint period_ns, uint duty_ns)
{
struct cros_ec_pwm_priv *priv = dev_get_priv(dev);
uint duty;
int ret;
debug("%s: period_ns=%u, duty_ns=%u asked\n", __func__,
period_ns, duty_ns);
/* No way to set the period, only a relative duty cycle */
duty = EC_PWM_MAX_DUTY * duty_ns / period_ns;
if (duty > EC_PWM_MAX_DUTY)
duty = EC_PWM_MAX_DUTY;
if (!priv->enabled) {
priv->duty = duty;
debug("%s: duty=%#x to-be-set\n", __func__, duty);
return 0;
}
ret = cros_ec_set_pwm_duty(dev->parent, channel, duty);
if (ret) {
debug("%s: duty=%#x failed\n", __func__, duty);
return ret;
}
priv->duty = duty;
debug("%s: duty=%#x set\n", __func__, duty);
return 0;
}
static int cros_ec_pwm_set_enable(struct udevice *dev, uint channel,
bool enable)
{
struct cros_ec_pwm_priv *priv = dev_get_priv(dev);
int ret;
ret = cros_ec_set_pwm_duty(dev->parent, channel,
enable ? priv->duty : 0);
if (ret) {
debug("%s: enable=%d failed\n", __func__, enable);
return ret;
}
priv->enabled = enable;
debug("%s: enable=%d (duty=%#x) set\n", __func__,
enable, priv->duty);
return 0;
}
static const struct pwm_ops cros_ec_pwm_ops = {
.set_config = cros_ec_pwm_set_config,
.set_enable = cros_ec_pwm_set_enable,
};
static const struct udevice_id cros_ec_pwm_ids[] = {
{ .compatible = "google,cros-ec-pwm" },
{ }
};
U_BOOT_DRIVER(cros_ec_pwm) = {
.name = "cros_ec_pwm",
.id = UCLASS_PWM,
.of_match = cros_ec_pwm_ids,
.ops = &cros_ec_pwm_ops,
.priv_auto = sizeof(struct cros_ec_pwm_priv),
};
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