[PATCH v3 2/2] imx8mn/8mp: Allow booting via USB

Fabio Estevam
2022-04-21T18:06:08Z

From: Fabio Estevam <festevam@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 <michael@amarulasolutions.com>
Signed-off-by: Fabio Estevam <festevam@denx.de>
---
Changes since v2:
- Handle explicitly the CONFIG_ENV_IS_NOWHERE case and return
ENVL_UNKNOWN as fallback (Marek).

arch/arm/mach-imx/imx8m/soc.c | 10 ++++++++++
1 file changed, 10 insertions(+)

diff --git a/arch/arm/mach-imx/imx8m/soc.c b/arch/arm/mach-imx/imx8m/soc.c
index 7059d87e336b..34a07b53e57a 100644
--- a/arch/arm/mach-imx/imx8m/soc.c
+++ b/arch/arm/mach-imx/imx8m/soc.c
@@ -1536,6 +1536,16 @@ 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;
+ if (IS_ENABLED(CONFIG_ENV_IS_NOWHERE))
+ return ENVL_NOWHERE;
+ return ENVL_UNKNOWN;
case QSPI_BOOT:
case SPI_NOR_BOOT:
if (IS_ENABLED(CONFIG_ENV_IS_IN_SPI_FLASH))
--
2.25.1