From: Fabio Estevam <feste...@denx.de>

When trying to boot via USB on i.MX8MN it is necessary to specify
the U-Boot environment location, otherwise the boot process simply
hangs.

Specify the environment location when booting from USB.

Tested on a imx8mn-evk.

Suggested-by: Michael Nazzareno Trimarchi <mich...@amarulasolutions.com>
Signed-off-by: Fabio Estevam <feste...@denx.de>
---
Changes since v1:
- Handle the env selection for the USB_BOOT case (Michael).

 arch/arm/mach-imx/imx8m/soc.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/arm/mach-imx/imx8m/soc.c b/arch/arm/mach-imx/imx8m/soc.c
index 7059d87e336b..34f8475bca46 100644
--- a/arch/arm/mach-imx/imx8m/soc.c
+++ b/arch/arm/mach-imx/imx8m/soc.c
@@ -1536,6 +1536,14 @@ enum env_location arch_env_get_location(enum 
env_operation op, int prio)
                return ENVL_UNKNOWN;
 
        switch (dev) {
+       case USB_BOOT:
+               if (IS_ENABLED(CONFIG_ENV_IS_IN_SPI_FLASH))
+                       return ENVL_SPI_FLASH;
+               if (IS_ENABLED(CONFIG_ENV_IS_IN_NAND))
+                       return ENVL_NAND;
+               if (IS_ENABLED(CONFIG_ENV_IS_IN_MMC))
+                       return ENVL_MMC;
+               return ENVL_NOWHERE;
        case QSPI_BOOT:
        case SPI_NOR_BOOT:
                if (IS_ENABLED(CONFIG_ENV_IS_IN_SPI_FLASH))
-- 
2.25.1

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