[PATCH 1/2] dt-bindings: pinctrl: mediatek: mt8188: allow gpio hogs

[PATCH 1/2] dt-bindings: pinctrl: mediatek: mt8188: allow gpio hogs

[Icenowy Zheng]

Add gpio hogs subnode rules to the MT8188 pinctrl binding.

Signed-off-by: Icenowy Zheng <zhengxingda@iscas.ac.cn>
---
 .../devicetree/bindings/pinctrl/mediatek,mt8188-pinctrl.yaml | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/pinctrl/mediatek,mt8188-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/mediatek,mt8188-pinctrl.yaml
index e994b0c70dbfd..1cf06e46f7bb0 100644
--- a/Documentation/devicetree/bindings/pinctrl/mediatek,mt8188-pinctrl.yaml
+++ b/Documentation/devicetree/bindings/pinctrl/mediatek,mt8188-pinctrl.yaml
@@ -67,6 +67,11 @@ properties:
 
 # PIN CONFIGURATION NODES
 patternProperties:
+  "-hog(-[0-9]+)?$":
+    type: object
+    required:
+      - gpio-hog
+
   '-pins$':
     type: object
     additionalProperties: false
-- 
2.52.0

[PATCH 2/2] arm64: dts: mediatek: mt8188-geralt: enable Wi-Fi card

[Icenowy Zheng]

The mainline pcie-mediatek-gen3 driver does not have code managing
downstream device power / reset.

As the Wi-Fi card on ciri is a fixed device, set the related regulator
to always-on and use GPIO hog to set the status of its reset pin.

Signed-off-by: Icenowy Zheng <zhengxingda@iscas.ac.cn>
---
 arch/arm64/boot/dts/mediatek/mt8188-geralt.dtsi | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8188-geralt.dtsi b/arch/arm64/boot/dts/mediatek/mt8188-geralt.dtsi
index 8e423504ec052..c25780098103b 100644
--- a/arch/arm64/boot/dts/mediatek/mt8188-geralt.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8188-geralt.dtsi
@@ -544,6 +544,11 @@ &mt6359codec {
 	mediatek,mic-type-2 = <2>; /* DMIC */
 };
 
+&mt6359_vcn18_ldo_reg {
+	/* Used by WLAN */
+	regulator-always-on;
+};
+
 &mt6359_vcore_buck_reg {
 	regulator-always-on;
 };
@@ -1145,6 +1150,12 @@ pins-en-pp3300-wlan {
 			output-low;
 		};
 	};
+
+	wlan-reset-hog {
+		gpio-hog;
+		gpios = <145 GPIO_ACTIVE_HIGH>;
+		output-high;
+	};
 };
 
 &pmic {
-- 
2.52.0

Re: [PATCH 2/2] arm64: dts: mediatek: mt8188-geralt: enable Wi-Fi card

[Chen-Yu Tsai]

Hi,

On Mon, May 4, 2026 at 3:28 PM Icenowy Zheng <zhengxingda@iscas.ac.cn> wrote:
>
> The mainline pcie-mediatek-gen3 driver does not have code managing
> downstream device power / reset.
>
> As the Wi-Fi card on ciri is a fixed device, set the related regulator
> to always-on and use GPIO hog to set the status of its reset pin.

The plan now is to model it as an M.2 E-key slot (even though the chip
is actually soldered on the main board).

I have some of the patches ready, but I'm still working out the USB
side of it.


ChenYu

> Signed-off-by: Icenowy Zheng <zhengxingda@iscas.ac.cn>
> ---
>  arch/arm64/boot/dts/mediatek/mt8188-geralt.dtsi | 11 +++++++++++
>  1 file changed, 11 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/mediatek/mt8188-geralt.dtsi b/arch/arm64/boot/dts/mediatek/mt8188-geralt.dtsi
> index 8e423504ec052..c25780098103b 100644
> --- a/arch/arm64/boot/dts/mediatek/mt8188-geralt.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt8188-geralt.dtsi
> @@ -544,6 +544,11 @@ &mt6359codec {
>         mediatek,mic-type-2 = <2>; /* DMIC */
>  };
>
> +&mt6359_vcn18_ldo_reg {
> +       /* Used by WLAN */
> +       regulator-always-on;
> +};
> +
>  &mt6359_vcore_buck_reg {
>         regulator-always-on;
>  };
> @@ -1145,6 +1150,12 @@ pins-en-pp3300-wlan {
>                         output-low;
>                 };
>         };
> +
> +       wlan-reset-hog {
> +               gpio-hog;
> +               gpios = <145 GPIO_ACTIVE_HIGH>;
> +               output-high;
> +       };
>  };
>
>  &pmic {
> --
> 2.52.0
>
>

Re: [PATCH 2/2] arm64: dts: mediatek: mt8188-geralt: enable Wi-Fi card

[Icenowy Zheng]

在 2026-05-04一的 15:34 +0800，Chen-Yu Tsai写道：
> Hi,
> 
> On Mon, May 4, 2026 at 3:28 PM Icenowy Zheng
> <zhengxingda@iscas.ac.cn> wrote:
> > 
> > The mainline pcie-mediatek-gen3 driver does not have code managing
> > downstream device power / reset.
> > 
> > As the Wi-Fi card on ciri is a fixed device, set the related
> > regulator
> > to always-on and use GPIO hog to set the status of its reset pin.
> 
> The plan now is to model it as an M.2 E-key slot (even though the
> chip
> is actually soldered on the main board).

Interestingly I saw a "PCI_PWRCTRL_GENERIC" driver in 7.1, although it
does not support toggling #PERST now -- maybe this should be done and
used instead? (Well it looks like the driver had existed for some time,
but it was for "slots" previously)

Thanks,
Icenowy

> 
> I have some of the patches ready, but I'm still working out the USB
> side of it.
> 
> 
> ChenYu
> 
> > Signed-off-by: Icenowy Zheng <zhengxingda@iscas.ac.cn>
> > ---
> >  arch/arm64/boot/dts/mediatek/mt8188-geralt.dtsi | 11 +++++++++++
> >  1 file changed, 11 insertions(+)
> > 
> > diff --git a/arch/arm64/boot/dts/mediatek/mt8188-geralt.dtsi
> > b/arch/arm64/boot/dts/mediatek/mt8188-geralt.dtsi
> > index 8e423504ec052..c25780098103b 100644
> > --- a/arch/arm64/boot/dts/mediatek/mt8188-geralt.dtsi
> > +++ b/arch/arm64/boot/dts/mediatek/mt8188-geralt.dtsi
> > @@ -544,6 +544,11 @@ &mt6359codec {
> >         mediatek,mic-type-2 = <2>; /* DMIC */
> >  };
> > 
> > +&mt6359_vcn18_ldo_reg {
> > +       /* Used by WLAN */
> > +       regulator-always-on;
> > +};
> > +
> >  &mt6359_vcore_buck_reg {
> >         regulator-always-on;
> >  };
> > @@ -1145,6 +1150,12 @@ pins-en-pp3300-wlan {
> >                         output-low;
> >                 };
> >         };
> > +
> > +       wlan-reset-hog {
> > +               gpio-hog;
> > +               gpios = <145 GPIO_ACTIVE_HIGH>;
> > +               output-high;
> > +       };
> >  };
> > 
> >  &pmic {
> > --
> > 2.52.0
> > 
> > 

Re: [PATCH 2/2] arm64: dts: mediatek: mt8188-geralt: enable Wi-Fi card

[Chen-Yu Tsai]

On Wed, May 6, 2026 at 10:14 PM Icenowy Zheng <zhengxingda@iscas.ac.cn> wrote:
>
> 在 2026-05-04一的 15:34 +0800，Chen-Yu Tsai写道：
> > Hi,
> >
> > On Mon, May 4, 2026 at 3:28 PM Icenowy Zheng
> > <zhengxingda@iscas.ac.cn> wrote:
> > >
> > > The mainline pcie-mediatek-gen3 driver does not have code managing
> > > downstream device power / reset.
> > >
> > > As the Wi-Fi card on ciri is a fixed device, set the related
> > > regulator
> > > to always-on and use GPIO hog to set the status of its reset pin.
> >
> > The plan now is to model it as an M.2 E-key slot (even though the
> > chip
> > is actually soldered on the main board).
>
> Interestingly I saw a "PCI_PWRCTRL_GENERIC" driver in 7.1, although it
> does not support toggling #PERST now -- maybe this should be done and
> used instead? (Well it looks like the driver had existed for some time,
> but it was for "slots" previously)

#PERST currently is still left to the PCI controller drivers, since some
of them have dedicated functions for it, while others use the GPIO API.

If you check the history of the "PCI pwrctrl framework" [1], you will
see the design choice.

[1] https://lore.kernel.org/all/20260115-pci-pwrctrl-rework-v5-0-9d26da3ce903@oss.qualcomm.com/

> Thanks,
> Icenowy
>
> >
> > I have some of the patches ready, but I'm still working out the USB
> > side of it.
> >
> >
> > ChenYu
> >
> > > Signed-off-by: Icenowy Zheng <zhengxingda@iscas.ac.cn>
> > > ---
> > >  arch/arm64/boot/dts/mediatek/mt8188-geralt.dtsi | 11 +++++++++++
> > >  1 file changed, 11 insertions(+)
> > >
> > > diff --git a/arch/arm64/boot/dts/mediatek/mt8188-geralt.dtsi
> > > b/arch/arm64/boot/dts/mediatek/mt8188-geralt.dtsi
> > > index 8e423504ec052..c25780098103b 100644
> > > --- a/arch/arm64/boot/dts/mediatek/mt8188-geralt.dtsi
> > > +++ b/arch/arm64/boot/dts/mediatek/mt8188-geralt.dtsi
> > > @@ -544,6 +544,11 @@ &mt6359codec {
> > >         mediatek,mic-type-2 = <2>; /* DMIC */
> > >  };
> > >
> > > +&mt6359_vcn18_ldo_reg {
> > > +       /* Used by WLAN */
> > > +       regulator-always-on;
> > > +};
> > > +
> > >  &mt6359_vcore_buck_reg {
> > >         regulator-always-on;
> > >  };
> > > @@ -1145,6 +1150,12 @@ pins-en-pp3300-wlan {
> > >                         output-low;
> > >                 };
> > >         };
> > > +
> > > +       wlan-reset-hog {
> > > +               gpio-hog;
> > > +               gpios = <145 GPIO_ACTIVE_HIGH>;
> > > +               output-high;
> > > +       };
> > >  };
> > >
> > >  &pmic {
> > > --
> > > 2.52.0
> > >
> > >
>

Re: [PATCH 1/2] dt-bindings: pinctrl: mediatek: mt8188: allow gpio hogs

[Conor Dooley]

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On Mon, May 04, 2026 at 03:27:47PM +0800, Icenowy Zheng wrote:
> Add gpio hogs subnode rules to the MT8188 pinctrl binding.
> 
> Signed-off-by: Icenowy Zheng <zhengxingda@iscas.ac.cn>

Acked-by: Conor Dooley <conor.dooley@microchip.com>
pw-bot: not-applicable

[-- Attachment #2: signature.asc --]
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Re: [PATCH 1/2] dt-bindings: pinctrl: mediatek: mt8188: allow gpio hogs

[Linus Walleij]

On Mon, May 4, 2026 at 9:28 AM Icenowy Zheng <zhengxingda@iscas.ac.cn> wrote:

> Add gpio hogs subnode rules to the MT8188 pinctrl binding.
>
> Signed-off-by: Icenowy Zheng <zhengxingda@iscas.ac.cn>

This patch 1/2 applied to the pinctrl tree.

Please funnel patch 2/2 through the SoC tree.

Yours,
Linus Walleij