Messages in this thread Patch in this message | | | Date | Wed, 15 Feb 2017 19:36:22 +0200 | From | Krzysztof Kozlowski <> | Subject | Re: [PATCH 2/4] pinctrl: samsung: Register pinctrl before GPIO |
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On Mon, Feb 13, 2017 at 10:11:04AM +0000, Charles Keepax wrote: > If we request a GPIO hog, then gpiochip_add_data will attempt to request > some of its own GPIOs. The driver also uses gpiochip_generic_request > which means that for any GPIO request to succeed the pinctrl needs to be > registered. Currently however the driver registers the GPIO and then the > pinctrl meaning all GPIO hog requests will fail, which then in turn causes > the whole driver to fail probe. Fix this up by ensuring we register the > pinctrl first. > > Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> > --- > drivers/pinctrl/samsung/pinctrl-samsung.c | 32 +++++++++++++++----------------
I think the code makes sense altough the description describes theoretical issue - we do not use GPIO hogs. Of course out of tree DTS could use them... so maybe mention that this is not an existing case?
For the code itself: Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Best regards, Krzysztof
> 1 file changed, 16 insertions(+), 16 deletions(-) > > diff --git a/drivers/pinctrl/samsung/pinctrl-samsung.c b/drivers/pinctrl/samsung/pinctrl-samsung.c > index d79eada..1134bc3 100644 > --- a/drivers/pinctrl/samsung/pinctrl-samsung.c > +++ b/drivers/pinctrl/samsung/pinctrl-samsung.c > @@ -893,6 +893,19 @@ static int samsung_pinctrl_register(struct platform_device *pdev, > return 0; > } >
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