How to change pinmux changes in kernel driver at run time
 

I know using dts files can modify the pin muxing statically, but want to do it at run time as below:

1. configure eSPI1 in spi mode zero as below in board dtsi file

MISO - pulled high
CLOCK - pulled down
MOSI - pulled down
CS - pulled high

2. When SPI is not in used by any application or processor goes to standby pull down the CS and MISO lines

I tried to implement the logic provided in but no luck.
https://www.kernel.org/doc/Documentation/pinctrl.txt

How one can achieve this in Linux kernel driver?
Any example would be good enough.


Thanks in advance for your kind help.

I have a vague memory of some additions to the kernel to allow for dynamic device tree stuff. I just don't recall much more than that. I think that's what you want to look into. Might have been a guy named Guenther on LKML.

So it means there is no framework provided by Linux kernel currently to change pin mux run time.