linux-kernel - [PATCH v2 6/6] arm64: dts: ti: k3-am64-phycore-som: Describe OSPI flash partition info

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Date:   Sat, 13 May 2023 19:47:12 +0530
From:   Vaishnav Achath <vaishnav.a@...com>
To:     <vigneshr@...com>, <nm@...com>, <kristo@...nel.org>,
        <conor+dt@...nel.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <afd@...com>
CC:     <vaishnav.a@...com>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <u-kumar1@...com>
Subject: [PATCH v2 6/6] arm64: dts: ti: k3-am64-phycore-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. AM64 Phycore SoM has a S28 64 MiB OSPI
flash with sector size of 256 KiB thus the size of the smallest partition
is chosen as 256 KiB, the partition names and offsets are chosen according
to the corresponding name and offsets in bootloader

Signed-off-by: Vaishnav Achath <vaishnav.a@...com>
---
 .../boot/dts/ti/k3-am64-phycore-som.dtsi      | 41 +++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-am64-phycore-som.dtsi b/arch/arm64/boot/dts/ti/k3-am64-phycore-som.dtsi
index 8dfb6301b17d..0d3d785530cf 100644
--- a/arch/arm64/boot/dts/ti/k3-am64-phycore-som.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am64-phycore-som.dtsi
@@ -219,6 +219,47 @@
 		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 0x100000>;
+			};
+
+			partition@...000 {
+				label = "ospi.tispl";
+				reg = <0x100000 0x200000>;
+			};
+
+			partition@...000 {
+				label = "ospi.u-boot";
+				reg = <0x300000 0x400000>;
+			};
+
+			partition@...000 {
+				label = "ospi.env";
+				reg = <0x700000 0x40000>;
+			};
+
+			partition@...000 {
+				label = "ospi.env.backup";
+				reg = <0x740000 0x40000>;
+			};
+
+			partition@...000 {
+				label = "ospi.rootfs";
+				reg = <0x800000 0x37c0000>;
+			};
+
+			partition@...0000 {
+				label = "ospi.phypattern";
+				reg = <0x3fc0000 0x40000>;
+			};
+		};
 	};
 };
 
-- 
2.17.1