For Colibri iMX6ULL we have to set pinmux for uart configuration ASAP (ideally before relocation) to get serial console working. Without this we miss almost the half of output (U-boot version, CPU defails, Reset cause, DRAM details etc.).
To achieve this we need to force pinctrl-mx6 to get probed before relocation and add u-boot,dm-pre-reloc properties to uart pinmux configuration nodes. Setting pinmux configuration for UART before was done in board_early_init_f().
Igor Opaniuk (3): pinctrl: nxp: DM_FLAG_PRE_RELOC by default ARM: dts: imx6ull-colibri: change hierarchy of DTS files ARM: dts: imx6ull-colibri: pre-reloc for uart pinmux modes
v2: - Addressed comments [Fabio Estevam]
arch/arm/dts/imx6ull-colibri-u-boot.dtsi | 12 + arch/arm/dts/imx6ull-colibri.dts | 596 +------------------- arch/arm/dts/imx6ull-colibri.dtsi | 641 ++++++++++++++++++++++ board/toradex/colibri-imx6ull/MAINTAINERS | 2 + drivers/pinctrl/nxp/pinctrl-imx5.c | 2 - drivers/pinctrl/nxp/pinctrl-imx6.c | 2 - drivers/pinctrl/nxp/pinctrl-imx7.c | 2 - drivers/pinctrl/nxp/pinctrl-imx7ulp.c | 2 - 8 files changed, 657 insertions(+), 602 deletions(-) create mode 100644 arch/arm/dts/imx6ull-colibri-u-boot.dtsi create mode 100644 arch/arm/dts/imx6ull-colibri.dtsi