arm64: dts: mediatek: Regulator cleanup for Chromebooks

arm64: dts: mediatek: Regulator cleanup for Chromebooks

[Chen-Yu Tsai]

Hi,

This series contains the device tree bits for the collection of regulator
related cleanups for MediaTek Chromebooks. The device tree binding and
driver changes are:

MT6315
- https://lore.kernel.org/all/20260320072302.2402489-1-wenst@chromium.org/
MT6359
- https://lore.kernel.org/all/20260320072440.2403318-1-wenst@chromium.org/
cros-ec-regulator
- https://lore.kernel.org/all/20260320083135.2455444-1-wenst@chromium.org/

The goal is to complete the regulator tree so that there are no orphan
regulators, and there are no devices that are missing supplies.

Patch 1 drops the bogus regulators from the mt6359 dtsi file.

Patch 2 adds a label for the mt6359 regulator sub-node. This is used in
subsequent patches.

Patch 3, 9, and 12 add supplies for the MT6359 PMIC in various
Chromebook designs.

Patch 4 and 10 add supplies for the MT6315 PMIC in various Chromebook
designs.

Patch 5 adds supplies for the ChromeOS EC controlled regulators in the
Asurada design.

Patch 6 and 13 add power supplies for the CPU cores.

Patch 7 adds the power supply for the SPI NOR flash chip in the Asurada
design.

Patch 8 and 11 fix up load switch descriptions.

Obviously the 3 dependency series need to be merged before this series,
or we will get a bunch of new DT validation errors.

Please have a look.


Thanks
ChenYu


Chen-Yu Tsai (13):
  arm64: dts: mediatek: mt6359: Drop ldo_vcn33_[12]_wifi regulators
  arm64: dts: mediatek: mt6359: Add label for regulator sub-node
  arm64: dts: mediatek: mt8192-asurada: Add MT6359 PMIC supplies
  arm64: dts: mediatek: mt8192-asurada: Add MT6315 PMIC supplies
  arm64: dts: mediatek: mt8192-asurada: Add supplies for ChromeOS EC
    regulators
  arm64: dts: mediatek: mt8192-asurada: Add CPU power supplies
  arm64: dts: mediatek: mt8192-asurada: Add SPI NOR flash power supply
  arm64: dts: mediatek: mt8192-asurada: Fix WiFi regulator description
  arm64: dts: mediatek: mt8195-cherry: Add MT6359 PMIC supplies
  arm64: dts: mediatek: mt8195-cherry: Add MT6315 PMIC supplies
  arm64: dts: mediatek: mt8195-cherry: Fix VBUS regulator description
  arm64: dts: mediatek: mt8188-geralt: Add MT6359 PMIC supplies
  arm64: dts: mediatek: mt8188-geralt: Add little core CPU power
    supplies

 arch/arm64/boot/dts/mediatek/mt6359.dtsi      | 12 +--
 .../boot/dts/mediatek/mt8188-geralt.dtsi      | 45 +++++++++++
 .../boot/dts/mediatek/mt8192-asurada.dtsi     | 75 ++++++++++++++++++-
 .../boot/dts/mediatek/mt8195-cherry.dtsi      | 28 ++++++-
 4 files changed, 145 insertions(+), 15 deletions(-)

-- 
2.53.0.959.g497ff81fa9-goog

[PATCH 01/13] arm64: dts: mediatek: mt6359: Drop ldo_vcn33_[12]_wifi regulators

[Chen-Yu Tsai]

The ldo_vcn33_[12]_wifi and ldo_vcn33_[12]_bt are just two regulator
outputs instead of four. The wifi and bt parts refer to separate enable
bits that are OR-ed together to affect the actual regulator output. The
separate bits allow the wifi and bt stacks to enable their power without
coordination between them.

Drop the ldo_vcn33_[12]_wifi regulators. ldo_vcn33_[12]_bt are kept with
the "_bt" suffix due to DT binding backward compatibility.

Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
---
 arch/arm64/boot/dts/mediatek/mt6359.dtsi | 10 ----------
 1 file changed, 10 deletions(-)

diff --git a/arch/arm64/boot/dts/mediatek/mt6359.dtsi b/arch/arm64/boot/dts/mediatek/mt6359.dtsi
index 45ad69ee49ed..1c41c4701319 100644
--- a/arch/arm64/boot/dts/mediatek/mt6359.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt6359.dtsi
@@ -169,11 +169,6 @@ mt6359_vcn33_1_bt_ldo_reg: ldo_vcn33_1_bt {
 				regulator-min-microvolt = <2800000>;
 				regulator-max-microvolt = <3500000>;
 			};
-			mt6359_vcn33_1_wifi_ldo_reg: ldo_vcn33_1_wifi {
-				regulator-name = "vcn33_1_wifi";
-				regulator-min-microvolt = <2800000>;
-				regulator-max-microvolt = <3500000>;
-			};
 			mt6359_vaux18_ldo_reg: ldo_vaux18 {
 				regulator-name = "vaux18";
 				regulator-min-microvolt = <1800000>;
@@ -236,11 +231,6 @@ mt6359_vcn33_2_bt_ldo_reg: ldo_vcn33_2_bt {
 				regulator-min-microvolt = <2800000>;
 				regulator-max-microvolt = <3500000>;
 			};
-			mt6359_vcn33_2_wifi_ldo_reg: ldo_vcn33_2_wifi {
-				regulator-name = "vcn33_2_wifi";
-				regulator-min-microvolt = <2800000>;
-				regulator-max-microvolt = <3500000>;
-			};
 			mt6359_va12_ldo_reg: ldo_va12 {
 				regulator-name = "va12";
 				regulator-min-microvolt = <1200000>;
-- 
2.53.0.959.g497ff81fa9-goog

[PATCH 02/13] arm64: dts: mediatek: mt6359: Add label for regulator sub-node

[Chen-Yu Tsai]

The MT6359 regulator bindings gained supply name properties. Add a label
to the regulator sub-node so that board dts files can reference the node
to set the supplies.

Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
---
 arch/arm64/boot/dts/mediatek/mt6359.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/mediatek/mt6359.dtsi b/arch/arm64/boot/dts/mediatek/mt6359.dtsi
index 1c41c4701319..a3542186fc64 100644
--- a/arch/arm64/boot/dts/mediatek/mt6359.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt6359.dtsi
@@ -19,7 +19,7 @@ mt6359codec: audio-codec {
 			compatible = "mediatek,mt6359-codec";
 		};
 
-		regulators {
+		mt6359regulators: regulators {
 			compatible = "mediatek,mt6359-regulator";
 
 			mt6359_vs1_buck_reg: buck_vs1 {
-- 
2.53.0.959.g497ff81fa9-goog

[PATCH 03/13] arm64: dts: mediatek: mt8192-asurada: Add MT6359 PMIC supplies

[Chen-Yu Tsai]

The MT6359 PMIC has a number of power inputs for its various buck and
LDO regulators. The binding recently gained property definitions for
them.

Add the supplies for the PMIC regulators to the common design dtsi file.

Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
---
 .../boot/dts/mediatek/mt8192-asurada.dtsi     | 21 +++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi b/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
index d22c55c3abe0..d16634e9f342 100644
--- a/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
@@ -550,6 +550,27 @@ &mmc1 {
 	no-mmc;
 };
 
+&mt6359regulators {
+	vsys-smps-supply = <&pp4200_g>;
+	vsys-vcore-supply = <&pp4200_g>;
+	vsys-vgpu11-supply = <&pp4200_g>;
+	vsys-vgpu12-supply = <&pp4200_g>;
+	vsys-vpa-supply = <&pp4200_g>;
+	vsys-vproc1-supply = <&pp4200_g>;
+	vsys-vproc2-supply = <&pp4200_g>;
+	vsys-vpu-supply = <&pp4200_g>;
+	vsys-vs1-supply = <&pp4200_g>;
+	vsys-vs2-supply = <&pp4200_g>;
+	vsys-vmodem-supply = <&pp4200_g>;
+	vsys-ldo1-supply = <&pp4200_g>;
+	vsys-ldo2-supply = <&pp4200_g>;
+	vs1-ldo1-supply = <&mt6359_vs1_buck_reg>;
+	vs1-ldo2-supply = <&mt6359_vs1_buck_reg>;
+	vs2-ldo1-supply = <&mt6359_vs2_buck_reg>;
+	vs2-ldo2-supply = <&mt6359_vs2_buck_reg>;
+	vio18-supply = <&mt6359_vio18_ldo_reg>;
+};
+
 /* for CORE */
 &mt6359_vgpu11_buck_reg {
 	regulator-always-on;
-- 
2.53.0.959.g497ff81fa9-goog

[PATCH 04/13] arm64: dts: mediatek: mt8192-asurada: Add MT6315 PMIC supplies

[Chen-Yu Tsai]

There are two MT6315 PMICs in the MT8192 Asurada design. One has two
outputs ganged together and two outputs unused. The other has three
outputs ganged together, and one left independent.

Add supplies for all the used regulators. In the case of ganged outputs,
add the supply for just the first output.

Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
---
 arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi b/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
index d16634e9f342..318903b112a3 100644
--- a/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
@@ -175,6 +175,17 @@ pp3300_wlan: regulator-3v3-wlan {
 		gpio = <&pio 143 GPIO_ACTIVE_HIGH>;
 	};
 
+	/* system wide switching 4.2V power rail */
+	pp4200_g: regulator-4v2-g {
+		compatible = "regulator-fixed";
+		regulator-name = "pp5000_a";
+		regulator-always-on;
+		regulator-boot-on;
+		regulator-min-microvolt = <4200000>;
+		regulator-max-microvolt = <4200000>;
+		vin-supply = <&ppvar_sys>;
+	};
+
 	/* system wide switching 5.0V power rail */
 	pp5000_a: regulator-5v0-a {
 		compatible = "regulator-fixed";
@@ -1612,6 +1623,9 @@ mt6315_6: pmic@6 {
 		reg = <0x6 SPMI_USID>;
 
 		regulators {
+			pvdd1-supply = <&pp4200_g>;
+			pvdd3-supply = <&pp4200_g>;
+
 			mt6315_6_vbuck1: vbuck1 {
 				regulator-name = "Vbcpu";
 				regulator-min-microvolt = <400000>;
@@ -1637,6 +1651,8 @@ mt6315_7: pmic@7 {
 		reg = <0x7 SPMI_USID>;
 
 		regulators {
+			pvdd1-supply = <&pp4200_g>;
+
 			mt6315_7_vbuck1: vbuck1 {
 				regulator-name = "Vgpu";
 				regulator-min-microvolt = <400000>;
-- 
2.53.0.959.g497ff81fa9-goog

Re: [PATCH 04/13] arm64: dts: mediatek: mt8192-asurada: Add MT6315 PMIC supplies

[Fei Shao]

On Fri, Mar 20, 2026 at 4:44 PM Chen-Yu Tsai <wenst@chromium.org> wrote:
>
> There are two MT6315 PMICs in the MT8192 Asurada design. One has two
> outputs ganged together and two outputs unused. The other has three
> outputs ganged together, and one left independent.
>
> Add supplies for all the used regulators. In the case of ganged outputs,
> add the supply for just the first output.
>
> Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
> ---
>  arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi b/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
> index d16634e9f342..318903b112a3 100644
> --- a/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
> @@ -175,6 +175,17 @@ pp3300_wlan: regulator-3v3-wlan {
>                 gpio = <&pio 143 GPIO_ACTIVE_HIGH>;
>         };
>
> +       /* system wide switching 4.2V power rail */
> +       pp4200_g: regulator-4v2-g {
> +               compatible = "regulator-fixed";
> +               regulator-name = "pp5000_a";

This should be pp4200_g.

Regards,
Fei

> +               regulator-always-on;
> +               regulator-boot-on;
> +               regulator-min-microvolt = <4200000>;
> +               regulator-max-microvolt = <4200000>;
> +               vin-supply = <&ppvar_sys>;
> +       };
> +
>         /* system wide switching 5.0V power rail */
>         pp5000_a: regulator-5v0-a {
>                 compatible = "regulator-fixed";

[PATCH 05/13] arm64: dts: mediatek: mt8192-asurada: Add supplies for ChromeOS EC regulators

[Chen-Yu Tsai]

The ChromeOS Embedded Controller exposes two regulators to the system in
the MT8192 Asurada design. Both these regulators also have power inputs.

Add supplies for these two regulators.

Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
---
 arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi b/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
index 318903b112a3..f4c8c3aa7a57 100644
--- a/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
@@ -1535,6 +1535,7 @@ mt6360_ldo3_reg: regulator@0 {
 			reg = <0>;
 			regulator-min-microvolt = <1800000>;
 			regulator-max-microvolt = <3300000>;
+			vin-supply = <&pp4200_g>;
 		};
 
 		mt6360_ldo5_reg: regulator@1 {
@@ -1542,6 +1543,7 @@ mt6360_ldo5_reg: regulator@1 {
 			reg = <1>;
 			regulator-min-microvolt = <3300000>;
 			regulator-max-microvolt = <3300000>;
+			vin-supply = <&pp4200_g>;
 		};
 
 		typec {
-- 
2.53.0.959.g497ff81fa9-goog

[PATCH 06/13] arm64: dts: mediatek: mt8192-asurada: Add CPU power supplies

[Chen-Yu Tsai]

The device tree for the MT8192 Asurada is missing power supplies for all
the CPU cores.

Add supplies to the CPU cores. The big and little clusters each have
their own regulator.

Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
---
 .../boot/dts/mediatek/mt8192-asurada.dtsi     | 32 +++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi b/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
index f4c8c3aa7a57..143f7f4161a8 100644
--- a/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
@@ -299,6 +299,38 @@ &afe {
 	memory-region = <&afe_dma_mem>;
 };
 
+&cpu0 {
+	cpu-supply = <&mt6315_6_vbuck3>;
+};
+
+&cpu1 {
+	cpu-supply = <&mt6315_6_vbuck3>;
+};
+
+&cpu2 {
+	cpu-supply = <&mt6315_6_vbuck3>;
+};
+
+&cpu3 {
+	cpu-supply = <&mt6315_6_vbuck3>;
+};
+
+&cpu4 {
+	cpu-supply = <&mt6315_6_vbuck1>;
+};
+
+&cpu5 {
+	cpu-supply = <&mt6315_6_vbuck1>;
+};
+
+&cpu6 {
+	cpu-supply = <&mt6315_6_vbuck1>;
+};
+
+&cpu7 {
+	cpu-supply = <&mt6315_6_vbuck1>;
+};
+
 &dpi0 {
 	pinctrl-names = "sleep", "default";
 	pinctrl-0 = <&dpi_pin_default>;
-- 
2.53.0.959.g497ff81fa9-goog

[PATCH 07/13] arm64: dts: mediatek: mt8192-asurada: Add SPI NOR flash power supply

[Chen-Yu Tsai]

The device tree for the MT8192 Asurada is missing a power supply for
the SPI NOR flash chip.

Add the supply for the SPI NOR flash chip.

Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
---
 arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi b/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
index 143f7f4161a8..b71c4c87730b 100644
--- a/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
@@ -660,6 +660,7 @@ flash@0 {
 		spi-max-frequency = <52000000>;
 		spi-rx-bus-width = <2>;
 		spi-tx-bus-width = <2>;
+		vcc-supply = <&mt6359_vio18_ldo_reg>;
 	};
 };
 
-- 
2.53.0.959.g497ff81fa9-goog

[PATCH 08/13] arm64: dts: mediatek: mt8192-asurada: Fix WiFi regulator description

[Chen-Yu Tsai]

The WiFi supply regulator is a current-limiting switch. It does not have
voltage regulation capabilities. The description is also missing a power
input.

Drop the voltage constraints, and add a supply input.

Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
---
 arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi b/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
index b71c4c87730b..e2f722d19683 100644
--- a/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
@@ -167,12 +167,11 @@ pp3300_wlan: regulator-3v3-wlan {
 		regulator-name = "pp3300_wlan";
 		regulator-always-on;
 		regulator-boot-on;
-		regulator-min-microvolt = <3300000>;
-		regulator-max-microvolt = <3300000>;
 		pinctrl-names = "default";
 		pinctrl-0 = <&pp3300_wlan_pins>;
 		enable-active-high;
 		gpio = <&pio 143 GPIO_ACTIVE_HIGH>;
+		vin-supply = <&pp3300_g>;
 	};
 
 	/* system wide switching 4.2V power rail */
-- 
2.53.0.959.g497ff81fa9-goog

[PATCH 09/13] arm64: dts: mediatek: mt8195-cherry: Add MT6359 PMIC supplies

[Chen-Yu Tsai]

The MT6359 PMIC has a number of power inputs for its various buck and
LDO regulators. The binding recently gained property definitions for
them.

Add the supplies for the PMIC regulators to the common design dtsi file.

Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
---
 .../boot/dts/mediatek/mt8195-cherry.dtsi      | 21 +++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
index f1ff64a84267..b53e602659a7 100644
--- a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
@@ -716,6 +716,27 @@ &mt6359codec {
 	mediatek,mic-type-0 = <2>; /* DMIC */
 };
 
+&mt6359regulators {
+	vsys-smps-supply = <&pp4200_z2>;
+	vsys-vcore-supply = <&pp4200_z2>;
+	vsys-vgpu11-supply = <&pp4200_z2>;
+	vsys-vgpu12-supply = <&pp4200_z2>;
+	vsys-vpa-supply = <&pp4200_z2>;
+	vsys-vproc1-supply = <&pp4200_z2>;
+	vsys-vproc2-supply = <&pp4200_z2>;
+	vsys-vpu-supply = <&pp4200_z2>;
+	vsys-vs1-supply = <&pp4200_z2>;
+	vsys-vs2-supply = <&pp4200_z2>;
+	vsys-vmodem-supply = <&pp4200_z2>;
+	vsys-ldo1-supply = <&pp4200_z2>;
+	vsys-ldo2-supply = <&pp4200_z2>;
+	vs1-ldo1-supply = <&mt6359_vs1_buck_reg>;
+	vs1-ldo2-supply = <&mt6359_vs1_buck_reg>;
+	vs2-ldo1-supply = <&mt6359_vs2_buck_reg>;
+	vs2-ldo2-supply = <&mt6359_vs2_buck_reg>;
+	vio18-supply = <&mt6359_vio18_ldo_reg>;
+};
+
 /* for CPU-L */
 &mt6359_vcore_buck_reg {
 	regulator-always-on;
-- 
2.53.0.959.g497ff81fa9-goog

[PATCH 10/13] arm64: dts: mediatek: mt8195-cherry: Add MT6315 PMIC supplies

[Chen-Yu Tsai]

The MT8195 Cherry design has two MT6315 PMICs. One has 4 outputs ganged
together; the other has 2 outputs ganged together, and the other two
unused.

Add supplies for these two PMICs. Since the outputs are ganged together,
just add the supply for the first one.

Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
---
 arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
index b53e602659a7..ca747531629d 100644
--- a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
@@ -1478,6 +1478,8 @@ mt6315@6 {
 		reg = <0x6 SPMI_USID>;
 
 		regulators {
+			pvdd1-supply = <&pp4200_z2>;
+
 			mt6315_6_vbuck1: vbuck1 {
 				regulator-name = "Vbcpu";
 				regulator-min-microvolt = <400000>;
@@ -1495,6 +1497,8 @@ mt6315@7 {
 		reg = <0x7 SPMI_USID>;
 
 		regulators {
+			pvdd1-supply = <&pp4200_z2>;
+
 			mt6315_7_vbuck1: vbuck1 {
 				regulator-name = "Vgpu";
 				regulator-min-microvolt = <400000>;
-- 
2.53.0.959.g497ff81fa9-goog

[PATCH 11/13] arm64: dts: mediatek: mt8195-cherry: Fix VBUS regulator description

[Chen-Yu Tsai]

The VBUS regulator is a current-limiting switch. It does not have
voltage regulation capabilities. The description is also missing a power
input.

Drop the voltage constraints, and add a supply input.

Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
---
 arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
index ca747531629d..19a24380044d 100644
--- a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
@@ -212,10 +212,9 @@ tboard_thermistor2: thermal-sensor-t2 {
 	usb_vbus: regulator-5v0-usb-vbus {
 		compatible = "regulator-fixed";
 		regulator-name = "usb-vbus";
-		regulator-min-microvolt = <5000000>;
-		regulator-max-microvolt = <5000000>;
 		enable-active-high;
 		regulator-always-on;
+		vin-supply = <&pp5000_s5>;
 	};
 
 	reserved_memory: reserved-memory {
-- 
2.53.0.959.g497ff81fa9-goog

[PATCH 12/13] arm64: dts: mediatek: mt8188-geralt: Add MT6359 PMIC supplies

[Chen-Yu Tsai]

The MT6359 PMIC has a number of power inputs for its various buck and
LDO regulators. The binding recently gained property definitions for
them.

Add the supplies for the PMIC regulators to the common design dtsi file.

Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
---
 .../boot/dts/mediatek/mt8188-geralt.dtsi      | 21 +++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8188-geralt.dtsi b/arch/arm64/boot/dts/mediatek/mt8188-geralt.dtsi
index 8e423504ec05..fc84dfedab03 100644
--- a/arch/arm64/boot/dts/mediatek/mt8188-geralt.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8188-geralt.dtsi
@@ -544,6 +544,27 @@ &mt6359codec {
 	mediatek,mic-type-2 = <2>; /* DMIC */
 };
 
+&mt6359regulators {
+	vsys-smps-supply = <&pp4200_s5>;
+	vsys-vcore-supply = <&pp4200_s5>;
+	vsys-vgpu11-supply = <&pp4200_s5>;
+	vsys-vgpu12-supply = <&pp4200_s5>;
+	vsys-vpa-supply = <&pp4200_s5>;
+	vsys-vproc1-supply = <&pp4200_s5>;
+	vsys-vproc2-supply = <&pp4200_s5>;
+	vsys-vpu-supply = <&pp4200_s5>;
+	vsys-vs1-supply = <&pp4200_s5>;
+	vsys-vs2-supply = <&pp4200_s5>;
+	vsys-vmodem-supply = <&pp4200_s5>;
+	vsys-ldo1-supply = <&pp4200_s5>;
+	vsys-ldo2-supply = <&pp4200_s5>;
+	vs1-ldo1-supply = <&mt6359_vs1_buck_reg>;
+	vs1-ldo2-supply = <&mt6359_vs1_buck_reg>;
+	vs2-ldo1-supply = <&mt6359_vs2_buck_reg>;
+	vs2-ldo2-supply = <&mt6359_vs2_buck_reg>;
+	vio18-supply = <&mt6359_vio18_ldo_reg>;
+};
+
 &mt6359_vcore_buck_reg {
 	regulator-always-on;
 };
-- 
2.53.0.959.g497ff81fa9-goog

Re: [PATCH 12/13] arm64: dts: mediatek: mt8188-geralt: Add MT6359 PMIC supplies

[Fei Shao]

On Fri, Mar 20, 2026 at 4:44 PM Chen-Yu Tsai <wenst@chromium.org> wrote:
>
> The MT6359 PMIC has a number of power inputs for its various buck and
> LDO regulators. The binding recently gained property definitions for
> them.
>
> Add the supplies for the PMIC regulators to the common design dtsi file.
>
> Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
> ---
>  .../boot/dts/mediatek/mt8188-geralt.dtsi      | 21 +++++++++++++++++++
>  1 file changed, 21 insertions(+)
>

Reviewed-by: Fei Shao <fshao@chromium.org>

[PATCH 13/13] arm64: dts: mediatek: mt8188-geralt: Add little core CPU power supplies

[Chen-Yu Tsai]

The device tree for the MT8188 Geralt is missing power supplies for all
the CPU cores. Power for the little cores is fed from the MT6359 PMIC.
Power for the big cores is fed from an MT6319 PMIC on SPMI. The latter
is currently not working in Linux.

Add the power supplies for the little cores.

Supplies for the big cores will be added once the issue with SPMI is
resolved.

Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
---
 .../boot/dts/mediatek/mt8188-geralt.dtsi      | 24 +++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8188-geralt.dtsi b/arch/arm64/boot/dts/mediatek/mt8188-geralt.dtsi
index fc84dfedab03..7108bfa53ad0 100644
--- a/arch/arm64/boot/dts/mediatek/mt8188-geralt.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8188-geralt.dtsi
@@ -217,6 +217,30 @@ &cam_vcore {
 	domain-supply = <&mt6359_vproc1_buck_reg>;
 };
 
+&cpu0 {
+	cpu-supply = <&mt6359_vcore_buck_reg>;
+};
+
+&cpu1 {
+	cpu-supply = <&mt6359_vcore_buck_reg>;
+};
+
+&cpu2 {
+	cpu-supply = <&mt6359_vcore_buck_reg>;
+};
+
+&cpu3 {
+	cpu-supply = <&mt6359_vcore_buck_reg>;
+};
+
+&cpu4 {
+	cpu-supply = <&mt6359_vcore_buck_reg>;
+};
+
+&cpu5 {
+	cpu-supply = <&mt6359_vcore_buck_reg>;
+};
+
 /*
  * Geralt is the reference design and doesn't have target TDP.
  * Ciri is (currently) the only device following Geralt, and its
-- 
2.53.0.959.g497ff81fa9-goog

Re: [PATCH 13/13] arm64: dts: mediatek: mt8188-geralt: Add little core CPU power supplies

[Fei Shao]

On Fri, Mar 20, 2026 at 4:44 PM Chen-Yu Tsai <wenst@chromium.org> wrote:
>
> The device tree for the MT8188 Geralt is missing power supplies for all
> the CPU cores. Power for the little cores is fed from the MT6359 PMIC.
> Power for the big cores is fed from an MT6319 PMIC on SPMI. The latter
> is currently not working in Linux.
>
> Add the power supplies for the little cores.
>
> Supplies for the big cores will be added once the issue with SPMI is
> resolved.
>
> Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
> ---
>  .../boot/dts/mediatek/mt8188-geralt.dtsi      | 24 +++++++++++++++++++
>  1 file changed, 24 insertions(+)
>

Reviewed-by: Fei Shao <fshao@chromium.org>