linux-kernel - [PATCH 4.4 041/312] ARM: dts: orion5x: fix the missing mtd flash on linkstation lswtgl

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Date:   Fri,  8 May 2020 14:30:32 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Roger Shimizu <rogershimizu@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Gregory CLEMENT <gregory.clement@...e-electrons.com>
Subject: [PATCH 4.4 041/312] ARM: dts: orion5x: fix the missing mtd flash on linkstation lswtgl

From: Roger Shimizu <rogershimizu@...il.com>

commit 44361a2cc13493fc41216d33bb9a562ec3a9cc4e upstream.

MTD flash stores u-boot and u-boot environment on linkstation lswtgl.
The latter one can be easily read/write by u-boot-tools package in Debian.

Fixes: dc57844a736f ("ARM: dts: orion5x: add buffalo linkstation ls-wtgl")
Signed-off-by: Roger Shimizu <rogershimizu@...il.com>
Reviewed-by: Andrew Lunn <andrew@...n.ch>
Signed-off-by: Gregory CLEMENT <gregory.clement@...e-electrons.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 arch/arm/boot/dts/orion5x-linkstation-lswtgl.dts |   31 +++++++++++++++++++++++
 1 file changed, 31 insertions(+)

--- a/arch/arm/boot/dts/orion5x-linkstation-lswtgl.dts
+++ b/arch/arm/boot/dts/orion5x-linkstation-lswtgl.dts
@@ -228,6 +228,37 @@
 	};
 };
 
+&devbus_bootcs {
+	status = "okay";
+	devbus,keep-config;
+
+	flash@0 {
+		compatible = "jedec-flash";
+		reg = <0 0x40000>;
+		bank-width = <1>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			header@0 {
+				reg = <0 0x30000>;
+				read-only;
+			};
+
+			uboot@...00 {
+				reg = <0x30000 0xF000>;
+				read-only;
+			};
+
+			uboot_env@...00 {
+				reg = <0x3F000 0x1000>;
+			};
+		};
+	};
+};
+
 &mdio {
 	status = "okay";