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imx8qxp_mek: Start with USDHC2 unpowered

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After triggering a "reboot" command in Linux the following
hang in SPL is observed:

U-Boot SPL 2020.04 (Apr 15 2020 - 10:49:29 -0300)
Normal Boot
WDT:   Not found!
Trying to boot from MMC2_2
spl: mmc init failed with error: -70
SPL: failed to boot from all boot devices
### ERROR ### Please RESET the board ###

This error happens because the CMD_ERR bit is set in the IRQ status
register after booting from Linux.

To ensure a fresh start, force the VMMC supply to get unpowered first.

Signed-off-by: Fabio Estevam <festevam@gmail.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
This commit is contained in:
Fabio Estevam 2020-04-15 15:01:34 -03:00 committed by Stefano Babic
parent 8f660ba7bb
commit 168fff26a8
1 changed files with 18 additions and 0 deletions
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18
board/freescale/imx8qxp_mek/spl.c
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@ -12,9 +12,24 @@
#include <dm/uclass-internal.h>
#include <dm/device-internal.h>
#include <dm/lists.h>
#include <asm/io.h>
#include <asm/gpio.h>
#include <asm/arch/sci/sci.h>
#include <asm/arch/imx8-pins.h>
#include <asm/arch/iomux.h>
DECLARE_GLOBAL_DATA_PTR;
#define GPIO_PAD_CTRL ((SC_PAD_CONFIG_NORMAL << PADRING_CONFIG_SHIFT) | \
(SC_PAD_ISO_OFF << PADRING_LPCONFIG_SHIFT) | \
(SC_PAD_28FDSOI_DSE_DV_HIGH << PADRING_DSE_SHIFT) | \
(SC_PAD_28FDSOI_PS_PU << PADRING_PULL_SHIFT))
#define USDHC2_SD_PWR IMX_GPIO_NR(4, 19)
static iomux_cfg_t usdhc2_sd_pwr[] = {
SC_P_USDHC1_RESET_B | MUX_PAD_CTRL(GPIO_PAD_CTRL),
};
void spl_board_init(void)
{
struct udevice *dev;
@ -32,6 +47,9 @@ void spl_board_init(void)
timer_init();
imx8_iomux_setup_multiple_pads(usdhc2_sd_pwr, ARRAY_SIZE(usdhc2_sd_pwr));
gpio_direction_output(USDHC2_SD_PWR, 0);
preloader_console_init();
puts("Normal Boot\n");