linux-kernel - [PATCH v3] ARM: dts: imx6qdl-nitrogen6x: Add SPI NOR partitions

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Message-Id: <20171127133127.16985-1-otavio@ossystems.com.br>
Date:   Mon, 27 Nov 2017 11:31:27 -0200
From:   Otavio Salvador <otavio@...ystems.com.br>
To:     linux-arm-kernel@...ts.infradead.org
Cc:     Gary Bisson <gary.bisson@...ndarydevices.com>,
        Otavio Salvador <otavio@...ystems.com.br>,
        Fabio Estevam <fabio.estevam@....com>,
        devicetree@...r.kernel.org, Sascha Hauer <kernel@...gutronix.de>,
        linux-kernel@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Russell King <linux@...linux.org.uk>,
        Shawn Guo <shawnguo@...nel.org>
Subject: [PATCH v3] ARM: dts: imx6qdl-nitrogen6x: Add SPI NOR partitions

This adds the partitions definition for the SPI NOR to provide
backward compatibility with the documented[1] layout used with
Boundary Devices BSP.

1. https://boundarydevices.com/boot-flash-access-linux/

It exports to Linux:

 mtd0: bootloader
 mtd1: env
 mtd2: splash

Signed-off-by: Otavio Salvador <otavio@...ystems.com.br>
---

Changes in v3:
 - use lock instead of read-only (Gary Bisson)

Changes in v2:
 - rework labels (Fabio Estevam)
 - add read-only flags (Fabio Estevam)

 arch/arm/boot/dts/imx6qdl-nitrogen6x.dtsi | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/arch/arm/boot/dts/imx6qdl-nitrogen6x.dtsi b/arch/arm/boot/dts/imx6qdl-nitrogen6x.dtsi
index 4bdf29169d2a..f855d802533e 100644
--- a/arch/arm/boot/dts/imx6qdl-nitrogen6x.dtsi
+++ b/arch/arm/boot/dts/imx6qdl-nitrogen6x.dtsi
@@ -276,6 +276,26 @@
 		compatible = "sst,sst25vf016b", "jedec,spi-nor";
 		spi-max-frequency = <20000000>;
 		reg = <0>;
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		partition@0 {
+			label = "bootloader";
+			reg = <0x0 0xc0000>;
+			lock;
+		};
+
+		partition@...00 {
+			label = "env";
+			reg = <0xc0000 0x2000>;
+			lock;
+		};
+
+		partition@...00 {
+			label = "splash";
+			reg = <0xc2000 0x13e000>;
+			lock;
+		};
 	};
 };
 
-- 
2.15.0