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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2021 SAMSUNG Electronics
* Jaehoon Chung <jh80.chung@samsung.com>
*/
#include <common.h>
#include <dm.h>
#include <mmc.h>
#include <pwrseq.h>
#include <asm/gpio.h>
#include <linux/delay.h>
int mmc_pwrseq_get_power(struct udevice *dev, struct mmc_config *cfg)
{
/* Enable power if needed */
return uclass_get_device_by_phandle(UCLASS_PWRSEQ, dev, "mmc-pwrseq",
&cfg->pwr_dev);
}
static int mmc_pwrseq_set_power(struct udevice *dev, bool enable)
{
struct gpio_desc reset;
int ret;
ret = gpio_request_by_name(dev, "reset-gpios", 0, &reset, GPIOD_IS_OUT);
if (ret)
return ret;
dm_gpio_set_value(&reset, 1);
udelay(1);
dm_gpio_set_value(&reset, 0);
udelay(200);
return 0;
}
static const struct pwrseq_ops mmc_pwrseq_ops = {
.set_power = mmc_pwrseq_set_power,
};
static const struct udevice_id mmc_pwrseq_ids[] = {
{ .compatible = "mmc-pwrseq-emmc" },
{ }
};
U_BOOT_DRIVER(mmc_pwrseq_drv) = {
.name = "mmc_pwrseq_emmc",
.id = UCLASS_PWRSEQ,
.of_match = mmc_pwrseq_ids,
.ops = &mmc_pwrseq_ops,
};
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