Subject: [PATCH] imx8qxp_mek: Start with USDHC2 unpowered

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

---

board/freescale/imx8qxp_mek/spl.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+)

diff --git a/board/freescale/imx8qxp_mek/spl.c b/board/freescale/imx8qxp_mek/spl.c index cb4006eb2a..e4e4cbe716 100644 --- a/board/freescale/imx8qxp_mek/spl.c +++ b/board/freescale/imx8qxp_mek/spl.c @@ -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");

-- 2.17.1