diff mbox series

[v3,10/17] arm64: dts: mediatek: set vmc regulator as always on

Message ID 20230203-evk-board-support-v3-10-0003e80e0095@baylibre.com
State Superseded
Headers show
Series Improve the MT8365 SoC and EVK board support | expand

Commit Message

Alexandre Mergnat March 29, 2023, 8:54 a.m. UTC 
From: Fabien Parent <fparent@baylibre.com>

MSDC1 IP block is powered by VMC. Make sure it is always on.

Signed-off-by: Fabien Parent <fparent@baylibre.com>
Signed-off-by: Alexandre Mergnat <amergnat@baylibre.com>
---
 arch/arm64/boot/dts/mediatek/mt8365-evk.dts | 5 +++++
 1 file changed, 5 insertions(+)

Comments

Alexandre Mergnat March 31, 2023, 11:08 a.m. UTC | #1 
Le mer. 29 mars 2023 à 15:25, AngeloGioacchino Del Regno
<angelogioacchino.delregno@collabora.com> a écrit :
>
> Il 29/03/23 10:54, amergnat@baylibre.com ha scritto:
> > From: Fabien Parent <fparent@baylibre.com>
> >
> > MSDC1 IP block is powered by VMC. Make sure it is always on.
>
> Why always on?
> Can't you just set mt6357_vmc_reg as VIN of mt6357_vmch_reg? :-)

I'm not sure to get it. mt6357_vmc_reg & mt6357_vmch_reg come from
PMIC and are supposed to be independent.
You suggest to link them in the mt8365-evk dts file using something like:
&mt6357_vmch_reg {
    vin-supply = <&mt6357_vmc_reg>;
};

Also, regulator binding probably needs change to support that.

Regards,
Alex
Alexandre Mergnat March 31, 2023, 11:23 a.m. UTC | #2 
Le ven. 31 mars 2023 à 13:08, Alexandre Mergnat
<amergnat@baylibre.com> a écrit :
>
> Le mer. 29 mars 2023 à 15:25, AngeloGioacchino Del Regno
> <angelogioacchino.delregno@collabora.com> a écrit :
> >
> > Il 29/03/23 10:54, amergnat@baylibre.com ha scritto:
> > > From: Fabien Parent <fparent@baylibre.com>
> > >
> > > MSDC1 IP block is powered by VMC. Make sure it is always on.
> >
> > Why always on?
> > Can't you just set mt6357_vmc_reg as VIN of mt6357_vmch_reg? :-)
>
> I'm not sure to get it. mt6357_vmc_reg & mt6357_vmch_reg come from
> PMIC and are supposed to be independent.
> You suggest to link them in the mt8365-evk dts file using something like:
> &mt6357_vmch_reg {
>     vin-supply = <&mt6357_vmc_reg>;
> };

Additionally, vin-supply is supported by fixed-regulator and
gpio-regulator, which is not the case here.
I think it isn't doable.

Regards,
Alex
diff mbox series

Patch

diff --git a/arch/arm64/boot/dts/mediatek/mt8365-evk.dts b/arch/arm64/boot/dts/mediatek/mt8365-evk.dts
index b5d018686cbe..22ec332fe9c9 100644
--- a/arch/arm64/boot/dts/mediatek/mt8365-evk.dts
+++ b/arch/arm64/boot/dts/mediatek/mt8365-evk.dts
@@ -140,6 +140,11 @@  &mt6357_pmic {
 	#interrupt-cells = <2>;
 };
 
+/* Needed by MSDC1 */
+&mt6357_vmc_reg {
+	regulator-always-on;
+};
+
 &pio {
 	gpio_keys: gpio-keys-pins {
 		pins {