Re: [PATCH] gpio: of: Restrict enable-gpio quirk to regulator-gpio

[Linus Walleij]

On Wed, Feb 20, 2019 at 11:52 AM Thierry Reding
<thierry.reding@xxxxxxxxx> wrote:

> From: Thierry Reding <treding@xxxxxxxxxx>
>
> Commit 0e7d6f940164 ("gpio: of: Apply regulator-gpio quirk only to
> enable-gpios") breaks the device tree ABI specified in the device tree
> bindings for fixed regulators (compatible "regulator-fixed"). According
> to these bindings the polarity of the GPIO is exclusively controlled by
> the presence or absence of the enable-active-high property. As such the
> polarity quirk implemented in of_gpio_flags_quirks() must be applied to
> the GPIO specified for fixed regulators.
>
> However, commit 0e7d6f940164 ("gpio: of: Apply regulator-gpio quirk only
> to enable-gpios") restricted the quirk to the enable-gpios property for
> fixed regulators as well, whereas according to the commit message itself
> it should only apply to "regulator-gpio" compatible device tree nodes.
>
> Fix this by actually implementing what the offending commit intended,
> which is to ensure that the quirk is applied to the GPIO specified by
> the "enable-gpio" property for the "regulator-gpio" bindings only.
>
> This fixes a regression on Jetson TX1 where the fixed regulator for the
> HDMI +5V pin relies on the flags quirk for the proper polarity.
>
> Fixes: 0e7d6f940164 ("gpio: of: Apply regulator-gpio quirk only to enable-gpios")
> Signed-off-by: Thierry Reding <treding@xxxxxxxxxx>

Patch applied with Marek's tested-by, thanks for thorough commit
message and helping out in sorting out this mess we've built
up over the years.

Yours,
Linus Walleij