[PATCH v5 0/4] ARM: Basic support for Amazon ford tablet (MT8127)

[PATCH v5 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 v5:
- Fix model value in dts.
- Fix missing space in watchdog's compatible in dtsi.
- Link to v4: https://patch.msgid.link/20260909-mt8127-amazon-ford-basic-v4-0-e9af5c420ab1@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- Drop [PATCH v2 3/5] as it was superseded by upstream changes.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 v5 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>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
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 v5 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>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.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 v5 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.

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
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..9bdf55d2da47 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 v5 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.

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
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..4b138e832795
--- /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 = "Amazon Fire 7 2015 (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 v5 3/4] ARM: dts: mediatek: mt8127: Add watchdog support

[sashiko-bot]

Thank you for your contribution! Sashiko AI review found 1 potential issue(s) to consider:
- [Low] The watchdog node is disabled by default in the SoC .dtsi, which is a device tree anti-pattern for internal IPs without board-specific dependencies.
--

commit 00ce16ebfa121cfaa7d2f6798bebf7e7aabf4c90
Author: Zakariya Hadrami <zkh@mailbox.org>

ARM: dts: mediatek: mt8127: Add watchdog support

This commit adds the watchdog node for MT8127 and explicitly disables it by
default in the SoC dtsi.

> diff --git a/arch/arm/boot/dts/mediatek/mt8127.dtsi b/arch/arm/boot/dts/mediatek/mt8127.dtsi
> index bd61ec7e70c0c..9bdf55d2da479 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";

[Severity: Low]
Is it necessary to disable this watchdog by default?

The watchdog timer is a core internal IP of the SoC that does not require
board-specific configuration. Standard device tree practice is to omit
status = "disabled" for internal IPs in the SoC .dtsi file.

The commit message states "disable it by default as it was not present
initially". Will this require every board file inheriting this .dtsi to
redundantly set status = "okay"?

> +		};

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260910-mt8127-amazon-ford-basic-v5-0-3cb9eeaffd5c@mailbox.org?part=3

Re: (subset) [PATCH v5 0/4] ARM: Basic support for Amazon ford tablet (MT8127)

[AngeloGioacchino Del Regno]

On Thu, 10 Sep 2026 15:29:11 +0200, Zakariya Hadrami wrote:
> This series of patches adds basic support for MT8127 SoC based Amazon ford
> tablet.

Applied to v7.3-next/dts32, thanks!

[2/4] dt-bindings: arm: mediatek: Add MT8127 Amazon ford
      commit: f97be0d722ebef4de65a39813778f6ba62c2ac1e
[3/4] ARM: dts: mediatek: mt8127: Add watchdog support
      commit: 5e23e7d730c6e984e4f03c3b25e2188de9f4ba99
[4/4] ARM: dts: mediatek: Add basic support for Amazon ford board
      commit: 2e195497fc9fc0dd89cf95dab80a2d0486dab65b

Cheers,
Angelo

Re: [PATCH v5 3/4] ARM: dts: mediatek: mt8127: Add watchdog support

[Zakariya Hadrami]

On Thu, Sep 10, 2026 at 01:36:04PM +0000, sashiko-bot@kernel.org wrote:
> Thank you for your contribution! Sashiko AI review found 1 potential issue(s) to consider:
> - [Low] The watchdog node is disabled by default in the SoC .dtsi, which is a device tree anti-pattern for internal IPs without board-specific dependencies.
> --
> 
> commit 00ce16ebfa121cfaa7d2f6798bebf7e7aabf4c90
> Author: Zakariya Hadrami <zkh@mailbox.org>
> 
> ARM: dts: mediatek: mt8127: Add watchdog support
> 
> This commit adds the watchdog node for MT8127 and explicitly disables it by
> default in the SoC dtsi.
> 
> > diff --git a/arch/arm/boot/dts/mediatek/mt8127.dtsi b/arch/arm/boot/dts/mediatek/mt8127.dtsi
> > index bd61ec7e70c0c..9bdf55d2da479 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";
> 
> [Severity: Low]
> Is it necessary to disable this watchdog by default?
> 
> The watchdog timer is a core internal IP of the SoC that does not require
> board-specific configuration. Standard device tree practice is to omit
> status = "disabled" for internal IPs in the SoC .dtsi file.
> 
> The commit message states "disable it by default as it was not present
> initially". Will this require every board file inheriting this .dtsi to
> redundantly set status = "okay"?
> 

Moose board originally inherits mt8127.dtsi without watchdog node and I
do not have a moose board to test nor infos on the expected behavior. So 
I will keep this as is and advise on further comments.

Thanks!

-- 
Best regards,
Zakariya

Re: [PATCH v5 1/4] dt-bindings: watchdog: mediatek: Add MT8127

[Guenter Roeck]

On Thu, Sep 10, 2026 at 03:29:12PM +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>
> Acked-by: Guenter Roeck <linux@roeck-us.net>
> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
> Signed-off-by: Zakariya Hadrami <zkh@mailbox.org>

Applied.

Thanks,
Guenter