Hello Dario, On 5/20/21 11:27 PM, Dario Binacchi wrote:
As described in section 9.1 of the TI reference manual for AM335x [1], "For writing to the control module registers, the MPU will need to be in privileged mode of operation and writes will not work from user mode". By adding the pin_dbg_set helper to pcs_pinctrl_ops it will be possible to write these registers from the pins debug:
this makes little sense, because it should be possible to write to the registers without introduction of this interface, pin group/function is the right level of abstraction for your particular task.
cd /sys/kernel/debug/pinctrl/44e10800.pinmux-pinctrl-single/ echo <pin-number> <reg-value> >pins [1] https://www.ti.com/lit/ug/spruh73q/spruh73q.pdf Signed-off-by: Dario Binacchi <dariobin@xxxxxxxxx>
I strongly object against this new interface to be added. -- Best wishes, Vladimir
