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Date:   Wed, 16 Dec 2020 10:10:04 +0000
From:   Guillaume Tucker <>
To:     Linus Walleij <>
Cc:     Bartosz Golaszewski <>,
        "open list:GPIO SUBSYSTEM" <>,
        open list <>,
        "" <>,
        Geert Uytterhoeven <>,
        Johan Hovold <>,
        Enric Balletbo i Serra <>,
        Collabora Kernel ML <>,
        Sean Wang <>,
        "moderated list:ARM/Mediatek SoC support" 
Subject: Re: linusw/devel bisection:
 baseline.bootrr.mediatek-mt8173-pinctrl-probed on mt8173-elm-hana

On 15/12/2020 12:20, Linus Walleij wrote:
> On Mon, Dec 14, 2020 at 11:28 PM Guillaume Tucker
> <> wrote:
>> Please see the bisection report below about the pinctrl driver
>> failing to probe on the arm64 mt8173-elm-hana platform.
> That's an excellent, helpful report which helps a lot!
> Thank you for doing this!

Thanks for the feedback!  Glad this helped.

>> This is the error message:
>> [    0.051788] gpio gpiochip0: Detected name collision for GPIO name ''
>> [    0.051813] gpio gpiochip0: GPIO name collision on the same chip, this is not allowed, fix all lines on the chip to have unique names
>> [    0.051832] gpiochip_add_data_with_key: GPIOs 377..511 (1000b000.pinctrl) failed to register, -17
>> [    0.051946] mediatek-mt8173-pinctrl: probe of 1000b000.pinctrl failed with error -22
> It seems we need to teach the core to ignore the name (empty string).

OK great, I see you've sent a patch for that.  I'll check if we
can confirm it fixes the issue (something I'd like to also

Best wishes,

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