linux-kernel - Re: [PATCH] ARM: dts: exynos: add max77693 irq configuration for midas

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Date:   Sun, 8 Jul 2018 03:08:48 +1000
From:   Simon Shields <simon@...eageos.org>
To:     Krzysztof Kozlowski <krzk@...nel.org>
Cc:     "linux-samsung-soc@...r.kernel.org" 
        <linux-samsung-soc@...r.kernel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Kukjin Kim <kgene@...nel.org>, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ARM: dts: exynos: add max77693 irq configuration for
 midas

On Sat, Jul 07, 2018 at 05:34:08PM +0200, Krzysztof Kozlowski wrote:
> On 7 July 2018 at 16:45, Simon Shields <simon@...eageos.org> wrote:
> > Currently, we assume that the bootloader has correctly configured
> > the interrupt pin for max77693. This might not actually be the case -
> > so it's better to configure it explicitly.
> >
> > Signed-off-by: Simon Shields <simon@...eageos.org>
> > ---
> >  arch/arm/boot/dts/exynos4412-midas.dtsi | 9 +++++++++
> >  1 file changed, 9 insertions(+)
> >
> > diff --git a/arch/arm/boot/dts/exynos4412-midas.dtsi b/arch/arm/boot/dts/exynos4412-midas.dtsi
> > index f35176a35a15..30760bf2eb71 100644
> > --- a/arch/arm/boot/dts/exynos4412-midas.dtsi
> > +++ b/arch/arm/boot/dts/exynos4412-midas.dtsi
> > @@ -156,6 +156,8 @@
> >                         compatible = "maxim,max77693";
> >                         interrupt-parent = <&gpx1>;
> >                         interrupts = <5 IRQ_TYPE_EDGE_FALLING>;
> > +                       pinctrl-names = "default";
> > +                       pinctrl-0 = <&max77693_irq>;
> >                         reg = <0x66>;
> >
> >                         regulators {
> > @@ -1117,6 +1119,13 @@
> >                 samsung,pin-pud = <EXYNOS_PIN_PULL_DOWN>;
> >         };
> >
> > +       max77693_irq: max77693-irq {
> > +               samsung,pins = "gpx1-5";
> > +               samsung,pin-function = <EXYNOS_PIN_FUNC_INPUT>;
> > +               samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
> > +               samsung,pin-drv = <EXYNOS4_PIN_DRV_LV1>;
> > +       };
> > +
> 
> Please put it before hdmi-hpd (gpx3-7).

OK.

> What about the interrupt for max77693 fuel gauge? 
> Maybe another patch for it as well?

Yes - in fact, it looks like most interrupt pins are configured by the
vendor kernel to have PULL_NONE, something which (as far as i can tell)
mainline doesn't do.

Maybe I should just prepare a series (or a single patch) which fixes all of them?
Or would you prefer I added the (remaining) eint configurations to
exynos4412-pinctrl.dtsi, and then used those?

> 
> Best regards,
> Krzysztof
> 

Cheers,
Simon

> 
> >         sleep1: sleep-states {
> >                 PIN_SLP(gpk0-0, PREV, NONE);
> >                 PIN_SLP(gpk0-1, PREV, NONE);
> > --
> > 2.18.0
> >