After the DM_MMC conversion the following eMMC boot error is observed:
U-Boot SPL 2019.04-rc4 (Mar 20 2019 - 18:53:28 +0000) Trying to boot from MMC1 MMC Device 0 not found spl: could not find mmc device 0. error: -19 SPL: failed to boot from all boot devices ### ERROR ### Please RESET the board ###
This happens because the SPL code does not initialize the SDHC pins and clock.
Fix it by moving the original eMMC initialization from U-Boot proper to SPL.
Reported-by: Otavio Salvador otavio@ossystems.com.br Signed-off-by: Fabio Estevam festevam@gmail.com Tested-by: Fabio Berton fabio.berton@ossystems.com.br Reviewed-by: Otavio Salvador otavio@ossystems.com.br --- board/technexion/pico-imx6ul/spl.c | 34 ++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+)
diff --git a/board/technexion/pico-imx6ul/spl.c b/board/technexion/pico-imx6ul/spl.c index 6464a32d3b..f972cc9eaf 100644 --- a/board/technexion/pico-imx6ul/spl.c +++ b/board/technexion/pico-imx6ul/spl.c @@ -10,6 +10,7 @@ #include <asm/gpio.h> #include <asm/mach-imx/iomux-v3.h> #include <asm/mach-imx/boot_mode.h> +#include <fsl_esdhc.h> #include <linux/libfdt.h> #include <spl.h>
@@ -141,4 +142,37 @@ void board_init_f(ulong dummy) void reset_cpu(ulong addr) { } + +#define USDHC_PAD_CTRL (PAD_CTL_PKE | PAD_CTL_PUE | \ + PAD_CTL_PUS_22K_UP | PAD_CTL_SPEED_LOW | \ + PAD_CTL_DSE_80ohm | PAD_CTL_SRE_FAST | PAD_CTL_HYS) + +static iomux_v3_cfg_t const usdhc1_pads[] = { + MX6_PAD_SD1_CLK__USDHC1_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL), + MX6_PAD_SD1_CMD__USDHC1_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL), + MX6_PAD_SD1_DATA0__USDHC1_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL), + MX6_PAD_SD1_DATA1__USDHC1_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL), + MX6_PAD_SD1_DATA2__USDHC1_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL), + MX6_PAD_SD1_DATA3__USDHC1_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL), + MX6_PAD_NAND_READY_B__USDHC1_DATA4 | MUX_PAD_CTRL(USDHC_PAD_CTRL), + MX6_PAD_NAND_CE0_B__USDHC1_DATA5 | MUX_PAD_CTRL(USDHC_PAD_CTRL), + MX6_PAD_NAND_CE1_B__USDHC1_DATA6 | MUX_PAD_CTRL(USDHC_PAD_CTRL), + MX6_PAD_NAND_CLE__USDHC1_DATA7 | MUX_PAD_CTRL(USDHC_PAD_CTRL), +}; + +static struct fsl_esdhc_cfg usdhc_cfg[1] = { + {USDHC1_BASE_ADDR}, +}; + +int board_mmc_getcd(struct mmc *mmc) +{ + return 1; +} + +int board_mmc_init(bd_t *bis) +{ + imx_iomux_v3_setup_multiple_pads(usdhc1_pads, ARRAY_SIZE(usdhc1_pads)); + usdhc_cfg[0].sdhc_clk = mxc_get_clock(MXC_ESDHC_CLK); + return fsl_esdhc_initialize(bis, &usdhc_cfg[0]); +} #endif