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imx: dynamic setting mmcdev and mmcroot

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Dynamic setting mmcdev and mmcroot.
Then when boot linux, we can have correct "root=/dev/mmcblk[x]p2"

Signed-off-by: Peng Fan <peng.fan@nxp.com>
This commit is contained in:
Peng Fan 2022-04-06 14:30:25 +08:00 • committed by Stefano Babic
parent 7b68357130
commit f342c9e381
3 changed files with 54 additions and 0 deletions
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2
arch/arm/include/asm/mach-imx/sys_proto.h
View file

@ -229,6 +229,8 @@ int mxs_reset_block(struct mxs_register_32 *reg);
int mxs_wait_mask_set(struct mxs_register_32 *reg, u32 mask, u32 timeout);
int mxs_wait_mask_clr(struct mxs_register_32 *reg, u32 mask, u32 timeout);
void board_late_mmc_env_init(void);
unsigned long call_imx_sip(unsigned long id, unsigned long reg0,
unsigned long reg1, unsigned long reg2,
unsigned long reg3);

3
board/freescale/common/Makefile
View file

@ -63,6 +63,9 @@ obj-$(CONFIG_ZM7300) += zm7300.o
obj-$(CONFIG_POWER_PFUZE100) += pfuze.o
obj-$(CONFIG_DM_PMIC_PFUZE100) += pfuze.o
obj-$(CONFIG_POWER_MC34VR500) += mc34vr500.o
ifneq (,$(filter $(SOC), imx8ulp))
obj-y += mmc.o
endif
obj-$(CONFIG_LS102XA_STREAM_ID) += ls102xa_stream_id.o

49
board/freescale/common/mmc.c Normal file
View file

@ -0,0 +1,49 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2016 Freescale Semiconductor, Inc.
* Copyright 2018-2022 NXP
*/
#include <common.h>
#include <command.h>
#include <asm/arch/sys_proto.h>
#include <linux/errno.h>
#include <asm/io.h>
#include <stdbool.h>
#include <mmc.h>
#include <env.h>
static int check_mmc_autodetect(void)
{
char *autodetect_str = env_get("mmcautodetect");
if (autodetect_str && !strcmp(autodetect_str, "yes"))
return 1;
return 0;
}
/* This should be defined for each board */
__weak int mmc_map_to_kernel_blk(int dev_no)
{
return dev_no;
}
void board_late_mmc_env_init(void)
{
char cmd[32];
char mmcblk[32];
u32 dev_no = mmc_get_env_dev();
if (!check_mmc_autodetect())
return;
env_set_ulong("mmcdev", dev_no);
/* Set mmcblk env */
sprintf(mmcblk, "/dev/mmcblk%dp2 rootwait rw", mmc_map_to_kernel_blk(dev_no));
env_set("mmcroot", mmcblk);
sprintf(cmd, "mmc dev %d", dev_no);
run_command(cmd, 0);
}