Linux Kernel altering PINCTRL

Hi Stephen,

First look at what is going bad on pinmux before changing any code.

Take pinmux register values from u-boot prompt and compare with the kernel pinmux values.

You can get all the pin mux values from kernel through debugfs. Follow these steps after kernel boot-up

1. mount -t debugfs debugfs /sys/kernel/debug/

2. ls -l /sys/kernel/debug/omap_mux

Look at this post just for reference http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/716/t/168911.aspx

Regards

AnilKumar

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I do not see the pinmux in the list of devices:

root@c6a816x-evm:/sys/kernel/debug# ls
asoc         clock        hid          memblock     musb         smartreflex  usb
bdi          gpio         kprobes      mmc0         regdump      testmode     vram

I did figure out how to disable the pinmux settings in the kernel -- I edited  ti8168_defconfig
and changed the CONFIG_OMAP_MUX setting to 'n'

Hi Stephen,

You have to enable CONFIG_OMAP_MUX for getting the debug messages of pinmux registers.

Then cross check the values in u-boot with kernel register values.

From code you can look @ either "board-ti8168evm.c" or "devices.c" file.

Regards

AnilKumar

Please mark this Forum post as answered via the Verify Answer button below if it helps answer your question.  Thanks!