On Montag, 26. März 2018 20:39:39 CEST Christian Lamparter wrote:
[...]
> > What is the correct way for qcom,ipq4019-pinctrl to configure a pin during
> > bootup (gpio-hog)? I can use the deprecated gpio sysfs infrastructure for
> > now but this seems to be only a dirty hack.
> >
> I found the bug/issue and it's sort of specific to OF, pinctrl and gpio-hog.
>
> However I do think that all pinctrl drivers are affect that call
> gpiochip_add_pin_range() *after* (devm_)gpiochip_add_data().
[...]
> For ipq4019 (and all the others too?), there is this an workaround
> that can be done:
>
> Add the gpio-ranges property to the pinctrl node in the qcom-ipq4019.dtsi:
>
> tlmm: pinctrl@1000000 {
> gpio-ranges = <&tlmm 0 0 99>;
> };
>
> and remove the gpiochip_add_pin_range() call in:
> <https://elixir.bootlin.com/linux/v4.16-rc7/source/drivers/pinctrl/qcom/pinctrl-msm.c#L834>
[...]
Thanks a lot for investigating this. I think this be discussed first by the
maintainers. Also Benoit Parrot should be asked here [1] because he integrated
the gpio-hog support for gpiolib-of.
Kind regards,
Sven
[1] https://lkml.kernel.org/r/46130418.GjRpGRXmAF@debian64Attachment:
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