Hi Lukasz,
On Mon, 3 Dec 2018 at 15:13, Lukasz Majewski lukma@denx.de wrote:
Dear All,
I've stumbled upon a following issue:
I do have a vybrid SoC which is not using SPL. It only uses U-boot proper (u-boot.vyb).
In the board_early_init_f() (when we are still in SRAM) I do perform pinctrl (pinmux) setup for UART1 (this is the console device).
I also do use ucalss-serial.c for this device and have proper pinmux definition for it in the *.dts file - but this is done latter.
The problem is that, when I try to remove pinmux setup code (imx_iomux_v3_setup_multiple_pads()) from board_early_init_f(), then I do see uart output late (no U-boot early output - U-Boot 2018.11-00052-g6552299a40-dirty (Nov 23 2018 - 16:13:51 +0100)).
The reason for this is the lack of pinctrl UART pins setup.
Do you see any idea how to move to full dts support for uart? The uart driver and pinmux have defined DM_FLAG_PRE_RELOC.
Is this due to pinconfig_post_bind() only operating after relocation?
The same kind of problem I do have with DDR memory controller pin setup. It would be nice to have it all in DTS, not in a board file.
[ My idea would be to manually extract relevant data from fdt blob and configure pins in board_early_init_f(), but this looks like a hack - maybe there is another, better solution? ]
Hopefully :-)
Regards, Simon