[PATCH v4 0/4] ARM: Basic support for Amazon ford tablet (MT8127)

[PATCH v4 0/4] ARM: Basic support for Amazon ford tablet (MT8127)

[Zakariya Hadrami via B4 Relay]

This series of patches adds basic support for MT8127 SoC based Amazon ford
tablet.

Signed-off-by: Zakariya Hadrami <zkh@mailbox.org>
---
Changes in v4:
- Add chassis-type property to dts.
- Add missing #address-cells, #size-cells and ranges properties to dts
  (sashiko report).
- Link to v3: https://patch.msgid.link/20260908-mt8127-amazon-ford-basic-v3-0-fc46bf1b6cb2@mailbox.org

Changes in v3:
- Rebase onto v7.3-rc1.
- Drop [PATCH v2 3/5] as it was superseded by upstream changes.
- Link to v2: https://lore.kernel.org/r/20260617-mt8127-amazon-ford-basic-v2-0-6859e29e72a8@proton.me

Changes in v2:
- Move amazon ford compatible string to existing enum.
- Fix watchdog node not sorted in unit address ascending order (sashiko report).
- Move bindings documentation patches before patches implementing the bindings.
- Link to v1: https://lore.kernel.org/r/20260617-mt8127-amazon-ford-basic-v1-0-d02ad15ac359@proton.me

---
Zakariya Hadrami (4):
      dt-bindings: watchdog: mediatek: Add MT8127
      dt-bindings: arm: mediatek: Add MT8127 Amazon ford
      ARM: dts: mediatek: mt8127: Add watchdog support
      ARM: dts: mediatek: Add basic support for Amazon ford board

 .../devicetree/bindings/arm/mediatek.yaml          |  1 +
 .../bindings/watchdog/mediatek,mtk-wdt.yaml        |  1 +
 arch/arm/boot/dts/mediatek/Makefile                |  1 +
 arch/arm/boot/dts/mediatek/mt8127-amazon-ford.dts  | 54 ++++++++++++++++++++++
 arch/arm/boot/dts/mediatek/mt8127.dtsi             |  7 +++
 5 files changed, 64 insertions(+)
---
base-commit: cee9395acd8043be0644b25c34bfa86623f2b935
change-id: 20260616-mt8127-amazon-ford-basic-1509d7052f7e

Best regards,
--  
Zakariya Hadrami <zkh@mailbox.org>

[PATCH v4 1/4] dt-bindings: watchdog: mediatek: Add MT8127

[Zakariya Hadrami via B4 Relay]

From: Zakariya Hadrami <zkh@mailbox.org>

Add entry for MT8127 SoC's watchdog which is compatible with MT6589's
one.

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Zakariya Hadrami <zkh@mailbox.org>
---
 Documentation/devicetree/bindings/watchdog/mediatek,mtk-wdt.yaml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/watchdog/mediatek,mtk-wdt.yaml b/Documentation/devicetree/bindings/watchdog/mediatek,mtk-wdt.yaml
index 953629cb9558..e6e4546da0aa 100644
--- a/Documentation/devicetree/bindings/watchdog/mediatek,mtk-wdt.yaml
+++ b/Documentation/devicetree/bindings/watchdog/mediatek,mtk-wdt.yaml
@@ -40,6 +40,7 @@ properties:
               - mediatek,mt7622-wdt
               - mediatek,mt7623-wdt
               - mediatek,mt7629-wdt
+              - mediatek,mt8127-wdt
               - mediatek,mt8173-wdt
               - mediatek,mt8188-wdt
               - mediatek,mt8189-wdt

-- 
2.54.0

[PATCH v4 2/4] dt-bindings: arm: mediatek: Add MT8127 Amazon ford

[Zakariya Hadrami via B4 Relay]

From: Zakariya Hadrami <zkh@mailbox.org>

Add entry for the MT8127 based Amazon ford tablet.

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Zakariya Hadrami <zkh@mailbox.org>
---
 Documentation/devicetree/bindings/arm/mediatek.yaml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/arm/mediatek.yaml b/Documentation/devicetree/bindings/arm/mediatek.yaml
index cd4040ad3437..180e6e4948e7 100644
--- a/Documentation/devicetree/bindings/arm/mediatek.yaml
+++ b/Documentation/devicetree/bindings/arm/mediatek.yaml
@@ -122,6 +122,7 @@ properties:
           - const: mediatek,mt7988a
       - items:
           - enum:
+              - amazon,ford
               - mediatek,mt8127-moose
           - const: mediatek,mt8127
       - items:

-- 
2.54.0

[PATCH v4 3/4] ARM: dts: mediatek: mt8127: Add watchdog support

[Zakariya Hadrami via B4 Relay]

From: Zakariya Hadrami <zkh@mailbox.org>

Add watchdog node and disable it by default as it was not present
initially.

Signed-off-by: Zakariya Hadrami <zkh@mailbox.org>
---
 arch/arm/boot/dts/mediatek/mt8127.dtsi | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/arm/boot/dts/mediatek/mt8127.dtsi b/arch/arm/boot/dts/mediatek/mt8127.dtsi
index bd61ec7e70c0..3e23673e7a9e 100644
--- a/arch/arm/boot/dts/mediatek/mt8127.dtsi
+++ b/arch/arm/boot/dts/mediatek/mt8127.dtsi
@@ -99,6 +99,13 @@ soc {
 		compatible = "simple-bus";
 		ranges;
 
+		watchdog: watchdog@10007000 {
+			compatible = "mediatek,mt8127-wdt","mediatek,mt6589-wdt";
+			reg = <0 0x10007000 0 0x100>;
+			interrupts = <GIC_SPI 88 IRQ_TYPE_LEVEL_LOW>;
+			status = "disabled";
+		};
+
 		timer: timer@10008000 {
 			compatible = "mediatek,mt8127-timer",
 					"mediatek,mt6577-timer";

-- 
2.54.0

[PATCH v4 4/4] ARM: dts: mediatek: Add basic support for Amazon ford board

[Zakariya Hadrami via B4 Relay]

From: Zakariya Hadrami <zkh@mailbox.org>

This tablet uses a MediaTek MT8127 system-on-chip with 1GB of RAM.
It can currently boot into initramfs with a working UART and
Simple Framebuffer using already initialized panel by the bootloader.

Signed-off-by: Zakariya Hadrami <zkh@mailbox.org>
---
 arch/arm/boot/dts/mediatek/Makefile               |  1 +
 arch/arm/boot/dts/mediatek/mt8127-amazon-ford.dts | 54 +++++++++++++++++++++++
 2 files changed, 55 insertions(+)

diff --git a/arch/arm/boot/dts/mediatek/Makefile b/arch/arm/boot/dts/mediatek/Makefile
index 37c4cded0eae..a610bc75c7d9 100644
--- a/arch/arm/boot/dts/mediatek/Makefile
+++ b/arch/arm/boot/dts/mediatek/Makefile
@@ -14,5 +14,6 @@ dtb-$(CONFIG_ARCH_MEDIATEK) += \
 	mt7623n-rfb-emmc.dtb \
 	mt7623n-bananapi-bpi-r2.dtb \
 	mt7629-rfb.dtb \
+	mt8127-amazon-ford.dtb \
 	mt8127-moose.dtb \
 	mt8135-evbp1.dtb
diff --git a/arch/arm/boot/dts/mediatek/mt8127-amazon-ford.dts b/arch/arm/boot/dts/mediatek/mt8127-amazon-ford.dts
new file mode 100644
index 000000000000..8edad5482de2
--- /dev/null
+++ b/arch/arm/boot/dts/mediatek/mt8127-amazon-ford.dts
@@ -0,0 +1,54 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/dts-v1/;
+#include "mt8127.dtsi"
+
+/ {
+	model = "MediaTek MT8127 Amazon Ford";
+	compatible = "amazon,ford", "mediatek,mt8127";
+	chassis-type = "tablet";
+
+	aliases {
+		serial0 = &uart0;
+	};
+
+	chosen {
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+		stdout-path = "serial0:921600n8";
+
+		framebuffer0: framebuffer@b7a00000 {
+			compatible = "simple-framebuffer";
+			memory-region = <&framebuffer_reserved>;
+			width = <1024>;
+			height = <600>;
+			stride = <(1024 * 2)>;
+			format = "r5g6b5";
+		};
+	};
+
+	memory@80000000 {
+		device_type = "memory";
+		reg = <0 0x80000000 0 0x40000000>;
+	};
+
+	reserved-memory {
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		framebuffer_reserved: framebuffer@b7a00000 {
+			reg = <0 0xb7a00000 0 0x1000000>;
+			no-map;
+		};
+	};
+};
+
+&uart0 {
+	status = "okay";
+};
+
+&watchdog {
+	status = "okay";
+};

-- 
2.54.0

Re: [PATCH v4 1/4] dt-bindings: watchdog: mediatek: Add MT8127

[Guenter Roeck]

On Wed, Sep 09, 2026 at 09:38:00PM +0200, Zakariya Hadrami wrote:
> From: Zakariya Hadrami <zkh@mailbox.org>
> 
> Add entry for MT8127 SoC's watchdog which is compatible with MT6589's
> one.
> 
> Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
> Signed-off-by: Zakariya Hadrami <zkh@mailbox.org>

Applied.

Thanks,
Guenter

Re: [PATCH v4 4/4] ARM: dts: mediatek: Add basic support for Amazon ford board

[AngeloGioacchino Del Regno]

On 9/9/26 21:38, Zakariya Hadrami via B4 Relay wrote:
> From: Zakariya Hadrami <zkh@mailbox.org>
> 
> This tablet uses a MediaTek MT8127 system-on-chip with 1GB of RAM.
> It can currently boot into initramfs with a working UART and
> Simple Framebuffer using already initialized panel by the bootloader.
> 
> Signed-off-by: Zakariya Hadrami <zkh@mailbox.org>
> ---
>   arch/arm/boot/dts/mediatek/Makefile               |  1 +
>   arch/arm/boot/dts/mediatek/mt8127-amazon-ford.dts | 54 +++++++++++++++++++++++
>   2 files changed, 55 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/mediatek/Makefile b/arch/arm/boot/dts/mediatek/Makefile
> index 37c4cded0eae..a610bc75c7d9 100644
> --- a/arch/arm/boot/dts/mediatek/Makefile
> +++ b/arch/arm/boot/dts/mediatek/Makefile
> @@ -14,5 +14,6 @@ dtb-$(CONFIG_ARCH_MEDIATEK) += \
>   	mt7623n-rfb-emmc.dtb \
>   	mt7623n-bananapi-bpi-r2.dtb \
>   	mt7629-rfb.dtb \
> +	mt8127-amazon-ford.dtb \
>   	mt8127-moose.dtb \
>   	mt8135-evbp1.dtb
> diff --git a/arch/arm/boot/dts/mediatek/mt8127-amazon-ford.dts b/arch/arm/boot/dts/mediatek/mt8127-amazon-ford.dts
> new file mode 100644
> index 000000000000..8edad5482de2
> --- /dev/null
> +++ b/arch/arm/boot/dts/mediatek/mt8127-amazon-ford.dts
> @@ -0,0 +1,54 @@
> +// SPDX-License-Identifier: GPL-2.0
> +
> +/dts-v1/;
> +#include "mt8127.dtsi"
> +
> +/ {
> +	model = "MediaTek MT8127 Amazon Ford";

Please be friendlier with whoever reads this model string :-)

	model = "Amazon Fire 7 2015 (Ford)";

that's better, isn't it?

After applying the proposed change,
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>

Cheers,
Angelo

> +	compatible = "amazon,ford", "mediatek,mt8127";
> +	chassis-type = "tablet";
> +
> +	aliases {
> +		serial0 = &uart0;
> +	};
> +
> +	chosen {
> +		#address-cells = <2>;
> +		#size-cells = <2>;
> +		ranges;
> +		stdout-path = "serial0:921600n8";
> +
> +		framebuffer0: framebuffer@b7a00000 {
> +			compatible = "simple-framebuffer";
> +			memory-region = <&framebuffer_reserved>;
> +			width = <1024>;
> +			height = <600>;
> +			stride = <(1024 * 2)>;
> +			format = "r5g6b5";
> +		};
> +	};
> +
> +	memory@80000000 {
> +		device_type = "memory";
> +		reg = <0 0x80000000 0 0x40000000>;
> +	};
> +
> +	reserved-memory {
> +		#address-cells = <2>;
> +		#size-cells = <2>;
> +		ranges;
> +
> +		framebuffer_reserved: framebuffer@b7a00000 {
> +			reg = <0 0xb7a00000 0 0x1000000>;
> +			no-map;
> +		};
> +	};
> +};
> +
> +&uart0 {
> +	status = "okay";
> +};
> +
> +&watchdog {
> +	status = "okay";
> +};
> 

Re: [PATCH v4 3/4] ARM: dts: mediatek: mt8127: Add watchdog support

[AngeloGioacchino Del Regno]

On 9/9/26 21:38, Zakariya Hadrami via B4 Relay wrote:
> From: Zakariya Hadrami <zkh@mailbox.org>
> 
> Add watchdog node and disable it by default as it was not present
> initially.
> 
> Signed-off-by: Zakariya Hadrami <zkh@mailbox.org>
> ---
>   arch/arm/boot/dts/mediatek/mt8127.dtsi | 7 +++++++
>   1 file changed, 7 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/mediatek/mt8127.dtsi b/arch/arm/boot/dts/mediatek/mt8127.dtsi
> index bd61ec7e70c0..3e23673e7a9e 100644
> --- a/arch/arm/boot/dts/mediatek/mt8127.dtsi
> +++ b/arch/arm/boot/dts/mediatek/mt8127.dtsi
> @@ -99,6 +99,13 @@ soc {
>   		compatible = "simple-bus";
>   		ranges;
>   
> +		watchdog: watchdog@10007000 {
> +			compatible = "mediatek,mt8127-wdt","mediatek,mt6589-wdt";

Missing space:

compatible = "mediatek,mt8127-wdt", "mediatek,mt6589-wdt";

After fixing,

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>

P.S.: If you send a v5 between now and now (or next week too :-P) I can pick it
in this cycle.

Cheers,
Angelo

> +			reg = <0 0x10007000 0 0x100>;
> +			interrupts = <GIC_SPI 88 IRQ_TYPE_LEVEL_LOW>;
> +			status = "disabled";
> +		};
> +
>   		timer: timer@10008000 {
>   			compatible = "mediatek,mt8127-timer",
>   					"mediatek,mt6577-timer";
> 

Re: [PATCH v4 1/4] dt-bindings: watchdog: mediatek: Add MT8127

[AngeloGioacchino Del Regno]

On 9/9/26 21:38, Zakariya Hadrami via B4 Relay wrote:
> From: Zakariya Hadrami <zkh@mailbox.org>
> 
> Add entry for MT8127 SoC's watchdog which is compatible with MT6589's
> one.
> 
> Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
> Acked-by: Guenter Roeck <linux@roeck-us.net>
> Signed-off-by: Zakariya Hadrami <zkh@mailbox.org>


Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>

Re: [PATCH v4 2/4] dt-bindings: arm: mediatek: Add MT8127 Amazon ford

[AngeloGioacchino Del Regno]

On 9/9/26 21:38, Zakariya Hadrami via B4 Relay wrote:
> From: Zakariya Hadrami <zkh@mailbox.org>
> 
> Add entry for the MT8127 based Amazon ford tablet.
> 
> Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
> Signed-off-by: Zakariya Hadrami <zkh@mailbox.org>

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>

Re: [v4,2/4] dt-bindings: arm: mediatek: Add MT8127 Amazon ford

[matthias.bgg]

> From: Zakariya Hadrami <zkh@mailbox.org>
> 
> Add entry for the MT8127 based Amazon ford tablet.
> 
> Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
> Signed-off-by: Zakariya Hadrami <zkh@mailbox.org>

Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>

> ---
>  Documentation/devicetree/bindings/arm/mediatek.yaml | 1 +
>  1 file changed, 1 insertion(+)
> diff --git a/Documentation/devicetree/bindings/arm/mediatek.yaml b/Documentation/devicetree/bindings/arm/mediatek.yaml
> index cd4040ad3437..180e6e4948e7 100644
> --- a/Documentation/devicetree/bindings/arm/mediatek.yaml
> +++ b/Documentation/devicetree/bindings/arm/mediatek.yaml
> @@ -122,6 +122,7 @@ properties:
>            - const: mediatek,mt7988a
>        - items:
>            - enum:
> +              - amazon,ford
>                - mediatek,mt8127-moose
>            - const: mediatek,mt8127
>        - items:
> 

Re: [PATCH v4 4/4] ARM: dts: mediatek: Add basic support for Amazon ford board

[Zakariya Hadrami]

On Thu, Sep 10, 2026 at 11:29:55AM +0200, AngeloGioacchino Del Regno wrote:
> >diff --git a/arch/arm/boot/dts/mediatek/mt8127-amazon-ford.dts b/arch/arm/boot/dts/mediatek/mt8127-amazon-ford.dts
> >new file mode 100644
> >index 000000000000..8edad5482de2
> >--- /dev/null
> >+++ b/arch/arm/boot/dts/mediatek/mt8127-amazon-ford.dts
> >@@ -0,0 +1,54 @@
> >+// SPDX-License-Identifier: GPL-2.0
> >+
> >+/dts-v1/;
> >+#include "mt8127.dtsi"
> >+
> >+/ {
> >+	model = "MediaTek MT8127 Amazon Ford";
> 
> Please be friendlier with whoever reads this model string :-)
> 
> 	model = "Amazon Fire 7 2015 (Ford)";
> 
> that's better, isn't it?

My bad, sorry!

This and the missing space in watchdog compatible fixed in v5.
Link to v5: https://patch.msgid.link/20260910-mt8127-amazon-ford-basic-v5-0-3cb9eeaffd5c@mailbox.org

Thank you very much!

> 
> After applying the proposed change,
> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
> 
> Cheers,
> Angelo
> 
> >+	compatible = "amazon,ford", "mediatek,mt8127";
> >+	chassis-type = "tablet";

-- 
Best regards,
Zakariya