On Tue, Jan 18, 2022 at 1:13 PM Harm Berntsen harm.berntsen@nedap.com wrote:
I did not check the manual assignment of bit 30 in the dts, I now see that it is used more often than I thought.
I'm using an imx8mn on U-Boot 2021.10. It was as simple as setting the pinctrl as you described and in the same way as Angus has done. I don't see why it does not work for him. He has an imx8mq so maybe that chip behaves differently?
After reading Angus' thread again, maybe there is an issue with his dts, where he uses pinctrl_hog1 and pinctrl_hog3.
I suspect that these pinctrl groups are not getting initialized at all.
To confirm that I would suggest Angus look at the IOMUXC_SW_MUX_CTL_PAD registers contents and verify whether the SION bit is set or not.
Another suggestion is to group all hog pins into pinctrl_hog instead.
Just for completeness, some snippets from my device tree:
#define IMX_PAD_SION 0x40000000
&gpio3 { pinctrl-names = "default"; pinctrl-0 = <&pinctrl_misc_gpio3>; };
pinctrl_misc_gpio3: misc-gpio3 { fsl,pins = < MX8MN_IOMUXC_SAI5_RXD2_GPIO3_IO23 IMX_PAD_SION MX8MN_IOMUXC_SAI5_RXD3_GPIO3_IO24 IMX_PAD_SION >; };