linux-kernel - [PATCH 1/4] arm64: dts: ti: k3-j721e-som: Describe OSPI flash partition info

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Message-ID: <20230503091218.25899-2-vaishnav.a@ti.com>
Date:   Wed, 3 May 2023 14:42:15 +0530
From:   Vaishnav Achath <vaishnav.a@...com>
To:     <nm@...com>, <kristo@...nel.org>, <vigneshr@...com>,
        <robh+dt@...nel.org>, <krzysztof.kozlowski+dt@...aro.org>
CC:     <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <u-kumar1@...com>, <vaishnav.a@...com>
Subject: [PATCH 1/4] arm64: dts: ti: k3-j721e-som: Describe OSPI flash partition info

Describe OSPI flash partition information through device tree, this
helps to remove passing partition information through the mtdparts
commandline parameter which requires maintaining the partition
information in a string format. J721E SoM has a MT35 64 MiB OSPI flash
with sector size of 128 KiB thus the size of the smallest partition is
chosen as 128KiB, the partition names and offsets are chosen according
to the corresponding name and offsets in bootloader.

Signed-off-by: Vaishnav Achath <vaishnav.a@...com>
---
 arch/arm64/boot/dts/ti/k3-j721e-som-p0.dtsi | 46 +++++++++++++++++++++
 1 file changed, 46 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-j721e-som-p0.dtsi b/arch/arm64/boot/dts/ti/k3-j721e-som-p0.dtsi
index e289d5b44356..1472c11d6660 100644
--- a/arch/arm64/boot/dts/ti/k3-j721e-som-p0.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-j721e-som-p0.dtsi
@@ -182,6 +182,52 @@
 		cdns,tchsh-ns = <60>;
 		cdns,tslch-ns = <60>;
 		cdns,read-delay = <0>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "ospi.tiboot3";
+				reg = <0x0 0x80000>;
+			};
+
+			partition@...00 {
+				label = "ospi.tispl";
+				reg = <0x80000 0x200000>;
+			};
+
+			partition@...000 {
+				label = "ospi.u-boot";
+				reg = <0x280000 0x400000>;
+			};
+
+			partition@...000 {
+				label = "ospi.env";
+				reg = <0x680000 0x20000>;
+			};
+
+			partition@...000 {
+				label = "ospi.env.backup";
+				reg = <0x6a0000 0x20000>;
+			};
+
+			partition@...000 {
+				label = "ospi.sysfw";
+				reg = <0x6c0000 0x100000>;
+			};
+
+			partition@...000 {
+				label = "ospi.rootfs";
+				reg = <0x800000 0x37c0000>;
+			};
+
+			partition@...0000 {
+				label = "ospi.phypattern";
+				reg = <0x3fe0000 0x20000>;
+			};
+		};
 	};
 };
 
-- 
2.17.1