From: Marcel Ziswiler marcel.ziswiler@toradex.com
Finally, found the root cause of the issue already once mentioned back here [2] which caused the following error message during boot:
imx_wdt watchdog@30280000: pinctrl_select_state_full: uclass_get_device_by_phandle_id: err=-19
Turns out while the watchdog node itself was already u-boot,dm-spl its pinctrl node was not which caused it to be unavailable at that early stage. Note that any and all other boards I checked also seem to be missing this. However, I can't judge whether or not they might indeed need a similar fix or not.
[2] https://marc.info/?l=u-boot&m=161786572422973
Fixes: commit d304e7ace3a6 ("ARM: imx8m: Fix reset in SPL on Toradex iMX8MM Verdin") Signed-off-by: Marcel Ziswiler marcel.ziswiler@toradex.com Reviewed-by: Fabio Estevam festevam@gmail.com
---
(no changes since v2)
Changes in v2: - New patch fixing watchdog pinctrl issue.
arch/arm/dts/imx8mm-verdin-u-boot.dtsi | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/arch/arm/dts/imx8mm-verdin-u-boot.dtsi b/arch/arm/dts/imx8mm-verdin-u-boot.dtsi index 0c65070cd5f..bf47930c36f 100644 --- a/arch/arm/dts/imx8mm-verdin-u-boot.dtsi +++ b/arch/arm/dts/imx8mm-verdin-u-boot.dtsi @@ -68,6 +68,10 @@ u-boot,dm-spl; };
+&pinctrl_wdog { + u-boot,dm-spl; +}; + &{/soc@0/bus@30800000/i2c@30a20000/pmic} { u-boot,dm-spl; };