Files
u-boot/board/dhelectronics/dh_imx8mp/imx8mp_dhcom_pdk2.c
Marek Vasut c0435ed04b arm: imx: Enable always-on regulators using board specific workaround on DHCOM SoM
U-Boot is currently unable to automatically enable regulators which
contain DT property regulator-always-on or regulator-boot-on. There
is an ongoing work to add this functionality to regulator core code,
but until the proper solution lands, add this awful workaround code
to force these regulators on. This is specifically needed to assure
the VIO regulator used to supply ethernet magnetics is enabled.

Signed-off-by: Marek Vasut <marex@denx.de>
2024-09-25 12:21:47 -06:00

130 lines
2.4 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2022 Marek Vasut <marex@denx.de>
*/
#include <asm/arch/clock.h>
#include <asm/arch/ddr.h>
#include <asm/arch/sys_proto.h>
#include <asm/io.h>
#include <dm.h>
#include <env.h>
#include <env_internal.h>
#include <i2c_eeprom.h>
#include <malloc.h>
#include <net.h>
#include <miiphy.h>
#include <power/regulator.h>
#include "lpddr4_timing.h"
#include "../common/dh_common.h"
#include "../common/dh_imx.h"
DECLARE_GLOBAL_DATA_PTR;
int mach_cpu_init(void)
{
icache_enable();
return 0;
}
int board_phys_sdram_size(phys_size_t *size)
{
const u16 memsz[] = { 512, 1024, 1536, 2048, 3072, 4096, 6144, 8192 };
const u8 ecc = readl(DDRC_ECCCFG0(0)) & DDRC_ECCCFG0_ECC_MODE_MASK;
u8 memcfg = dh_get_memcfg();
/* 896 kiB, i.e. 1 MiB without 12.5% reserved for in-band ECC */
*size = (u64)memsz[memcfg] * (SZ_1M - (ecc ? (SZ_1M / 8) : 0));
return 0;
}
static int dh_imx8_setup_ethaddr(void)
{
unsigned char enetaddr[6];
if (dh_mac_is_in_env("ethaddr"))
return 0;
if (dh_get_mac_is_enabled("ethernet0"))
return 0;
if (!dh_imx_get_mac_from_fuse(enetaddr))
goto out;
if (!dh_get_mac_from_eeprom(enetaddr, "eeprom0"))
goto out;
return -ENXIO;
out:
return eth_env_set_enetaddr("ethaddr", enetaddr);
}
static int dh_imx8_setup_eth1addr(void)
{
unsigned char enetaddr[6];
if (dh_mac_is_in_env("eth1addr"))
return 0;
if (dh_get_mac_is_enabled("ethernet1"))
return 0;
if (!dh_imx_get_mac_from_fuse(enetaddr))
goto increment_out;
if (!dh_get_mac_from_eeprom(enetaddr, "eeprom1"))
goto out;
/*
* Populate second ethernet MAC from first ethernet EEPROM with MAC
* address LSByte incremented by 1. This is only used on SoMs without
* second ethernet EEPROM, i.e. early prototypes.
*/
if (!dh_get_mac_from_eeprom(enetaddr, "eeprom0"))
goto increment_out;
return -ENXIO;
increment_out:
enetaddr[5]++;
out:
return eth_env_set_enetaddr("eth1addr", enetaddr);
}
int dh_setup_mac_address(void)
{
int ret;
ret = dh_imx8_setup_ethaddr();
if (ret)
printf("%s: Unable to setup ethaddr! ret = %d\n", __func__, ret);
ret = dh_imx8_setup_eth1addr();
if (ret)
printf("%s: Unable to setup eth1addr! ret = %d\n", __func__, ret);
return ret;
}
int board_init(void)
{
regulators_enable_boot_on(_DEBUG);
return 0;
}
int board_late_init(void)
{
dh_setup_mac_address();
return 0;
}
enum env_location env_get_location(enum env_operation op, int prio)
{
return prio ? ENVL_UNKNOWN : ENVL_SPI_FLASH;
}