u-boot/arch/arm/mach-imx/sata.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright 2011 Freescale Semiconductor, Inc.
 */

#include <asm/mach-imx/iomux-v3.h>
#include <asm/arch/iomux.h>
#include <asm/io.h>
#include <asm/arch/clock.h>
#include <asm/arch/sys_proto.h>

int setup_sata(void)
{
	struct iomuxc *const iomuxc_regs = (struct iomuxc *)IOMUXC_BASE_ADDR;
	int ret;

	if (!is_mx6dq() && !is_mx6dqp())
		return 1;

	ret = enable_sata_clock();
	if (ret)
		return ret;

	clrsetbits_le32(&iomuxc_regs->gpr[13],
			IOMUXC_GPR13_SATA_MASK,
			IOMUXC_GPR13_SATA_PHY_8_RXEQ_3P0DB
			|IOMUXC_GPR13_SATA_PHY_7_SATA2M
			|IOMUXC_GPR13_SATA_SPEED_3G
			|(3<<IOMUXC_GPR13_SATA_PHY_6_SHIFT)
			|IOMUXC_GPR13_SATA_SATA_PHY_5_SS_DISABLED
			|IOMUXC_GPR13_SATA_SATA_PHY_4_ATTEN_9_16
			|IOMUXC_GPR13_SATA_PHY_3_TXBOOST_0P00_DB
			|IOMUXC_GPR13_SATA_PHY_2_TX_1P104V
			|IOMUXC_GPR13_SATA_PHY_1_SLOW);

	return 0;
}