linux-kernel - [PATCH 1/2] arm64: dts: mt7622: declare SPI-NAND present on BPI-R64

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Date:   Wed, 19 Apr 2023 20:15:53 +0100
From:   Daniel Golle <daniel@...rotopia.org>
To:     devicetree@...r.kernel.org, linux-mediatek@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
Subject: [PATCH 1/2] arm64: dts: mt7622: declare SPI-NAND present on BPI-R64

The SPI-NOR node in the device tree of the BananaPi R64 has most likely
been copied from the reference board's device tree even though the R64
comes with an SPI-NAND chip rather than SPI-NOR.

Setup the Serial NAND Flash Interface (SNFI) controller, enable
hardware BCH error detection and correction engine and add the SPI-NAND
chip including basic partitions,

Signed-off-by: Daniel Golle <daniel@...rotopia.org>
---
 .../dts/mediatek/mt7622-bananapi-bpi-r64.dts  | 39 ++++++++++++++++---
 1 file changed, 34 insertions(+), 5 deletions(-)

diff --git a/arch/arm64/boot/dts/mediatek/mt7622-bananapi-bpi-r64.dts b/arch/arm64/boot/dts/mediatek/mt7622-bananapi-bpi-r64.dts
index af3fe61e40938..d583e816684cf 100644
--- a/arch/arm64/boot/dts/mediatek/mt7622-bananapi-bpi-r64.dts
+++ b/arch/arm64/boot/dts/mediatek/mt7622-bananapi-bpi-r64.dts
@@ -248,14 +248,42 @@ &nandc {
 	status = "disabled";
 };
 
-&nor_flash {
-	pinctrl-names = "default";
-	pinctrl-0 = <&spi_nor_pins>;
-	status = "disabled";
+&bch {
+	status = "okay";
+};
 
+&snfi {
+	pinctrl-names = "default";
+	pinctrl-0 = <&serial_nand_pins>;
+	status = "okay";
 	flash@0 {
-		compatible = "jedec,spi-nor";
+		compatible = "spi-nand";
 		reg = <0>;
+		spi-tx-bus-width = <4>;
+		spi-rx-bus-width = <4>;
+		nand-ecc-engine = <&snfi>;
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "bl2";
+				reg = <0x0 0x80000>;
+				read-only;
+			};
+
+			partition@...00 {
+				label = "fip";
+				reg = <0x80000 0x200000>;
+				read-only;
+			};
+
+			ubi: partition@...000 {
+				label = "ubi";
+				reg = <0x280000 0x7d80000>;
+			};
+		};
 	};
 };
 

base-commit: 13961ef828cbc254cc272221b7fc54851caa39a7
-- 
2.40.0