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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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