Re: [PATCH] soc: fsl: qe: request pins non-exclusively

On Tue, Nov 8, 2022 at 4:16 AM Dmitry Torokhov
[off-list ref] wrote:

Commit 84582f9ed090 ("soc: fsl: qe: Avoid using gpio_to_desc()") changed
qe_pin_request() to request and hold GPIO corresponding to a given pin.
Unfortunately this does not work, as fhci-hcd requests these GPIOs
first, befor calling qe_pin_request() (see
drivers/usb/host/fhci-hcd.c::of_fhci_probe()).
To fix it change qe_pin_request() to request GPIOs non-exclusively, and
free them once the code determines GPIO controller and offset for each
GPIO/pin.

Also reaching deep into gpiolib implementation is not the best idea. We
should either export gpio_chip_hwgpio() or keep converting to the global
gpio numbers space until we fix the driver to implement proper pin
control.

Fixes: 84582f9ed090 ("soc: fsl: qe: Avoid using gpio_to_desc()")
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Wow! Thanks for fixing this!

Reviewed-by: Linus Walleij <redacted>

I just sent that patch into the SoC patch tracker (soc@kernel.org)
with a not to apply it directly, I suggest you do the same (or ask me
to sign it off and send it).

Yours,
Linus Walleij