u-boot/board/st/stm32mp1/spl.c

// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
/*
 * Copyright (C) 2018, STMicroelectronics - All Rights Reserved
 */

#include <config.h>
#include <common.h>
#include <spl.h>
#include <dm.h>
#include <ram.h>
#include <asm/io.h>
#include <power/pmic.h>
#include <power/stpmic1.h>
#include <asm/arch/ddr.h>

void spl_board_init(void)
{
	/* Keep vdd on during the reset cycle */
#if defined(CONFIG_PMIC_STPMIC1) && defined(CONFIG_SPL_POWER_SUPPORT)
	struct udevice *dev;
	int ret;

	ret = uclass_get_device_by_driver(UCLASS_PMIC,
					  DM_GET_DRIVER(pmic_stpmic1), &dev);
	if (!ret)
		pmic_clrsetbits(dev,
				STPMIC1_BUCKS_MRST_CR,
				STPMIC1_MRST_BUCK(STPMIC1_BUCK3),
				STPMIC1_MRST_BUCK(STPMIC1_BUCK3));

	/* Check if debug is enabled to program PMIC according to the bit */
	if ((readl(TAMP_BOOT_CONTEXT) & TAMP_BOOT_DEBUG_ON) && !ret) {
		printf("Keep debug unit ON\n");

		pmic_clrsetbits(dev, STPMIC1_BUCKS_MRST_CR,
				STPMIC1_MRST_BUCK_DEBUG,
				STPMIC1_MRST_BUCK_DEBUG);

		if (STPMIC1_MRST_LDO_DEBUG)
			pmic_clrsetbits(dev, STPMIC1_LDOS_MRST_CR,
					STPMIC1_MRST_LDO_DEBUG,
					STPMIC1_MRST_LDO_DEBUG);
	}
#endif
}