From patchwork Wed Apr 15 18:01:34 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Fabio Estevam X-Patchwork-Id: 237811 List-Id: U-Boot discussion From: festevam at gmail.com (Fabio Estevam) Date: Wed, 15 Apr 2020 15:01:34 -0300 Subject: [PATCH] imx8qxp_mek: Start with USDHC2 unpowered Message-ID: <20200415180134.15468-1-festevam@gmail.com> 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 Reviewed-by: Peng Fan --- 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 #include #include +#include +#include +#include +#include +#include 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");