linux-kernel - [PATCH v2 10/11] arm64: dts: mediatek: cherry: Enable support for the SPI NOR flash

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Date:   Mon,  4 Jul 2022 12:13:20 +0200
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     robh+dt@...nel.org
Cc:     krzysztof.kozlowski+dt@...aro.org, matthias.bgg@...il.com,
        angelogioacchino.delregno@...labora.com, hsinyi@...omium.org,
        nfraprado@...labora.com, allen-kh.cheng@...iatek.com,
        gtk3@...ox.ru, luca@...tu.xyz, sam.shih@...iatek.com,
        sean.wang@...iatek.com, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, wenst@...omium.org
Subject: [PATCH v2 10/11] arm64: dts: mediatek: cherry: Enable support for the SPI NOR flash

This platform has a SPI NOR: enable support for it, completing the
storage compartment enablement for the entire platform.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Reviewed-by: Nícolas F. R. A. Prado <nfraprado@...labora.com>
---
 .../boot/dts/mediatek/mt8195-cherry.dtsi      | 31 +++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
index c07d3ac79f62..2c8b760d0da1 100644
--- a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
@@ -231,6 +231,21 @@ &mt6359_vufs_ldo_reg {
 	regulator-always-on;
 };
 
+&nor_flash {
+	status = "okay";
+
+	pinctrl-names = "default";
+	pinctrl-0 = <&nor_pins_default>;
+
+	flash@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <52000000>;
+		spi-rx-bus-width = <2>;
+		spi-tx-bus-width = <2>;
+	};
+};
+
 &pio {
 	mediatek,rsel-resistance-in-si-unit;
 	pinctrl-names = "default";
@@ -513,6 +528,22 @@ pins-rst {
 		};
 	};
 
+	nor_pins_default: nor-default-pins {
+		pins-ck-io {
+			pinmux = <PINMUX_GPIO142__FUNC_SPINOR_IO0>,
+				 <PINMUX_GPIO141__FUNC_SPINOR_CK>,
+				 <PINMUX_GPIO143__FUNC_SPINOR_IO1>;
+			drive-strength = <6>;
+			bias-pull-down;
+		};
+
+		pins-cs {
+			pinmux = <PINMUX_GPIO140__FUNC_SPINOR_CS>;
+			drive-strength = <6>;
+			bias-pull-up;
+		};
+	};
+
 	pio_default: pio-default-pins {
 		pins-wifi-enable {
 			pinmux = <PINMUX_GPIO58__FUNC_GPIO58>;
-- 
2.35.1