linux-kernel - [PATCH 4/4] arm64: dts: ti: k3-j7200-som: Describe OSPI and Hyperflash partition info

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Date:   Wed, 3 May 2023 14:42:18 +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 4/4] arm64: dts: ti: k3-j7200-som: Describe OSPI and Hyperflash partition info

Describe OSPI and Hyperflash 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. J7200 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 SoM also has a 64 MiB Hyperflash present on it,
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-j7200-som-p0.dtsi | 72 +++++++++++++++++++++
 1 file changed, 72 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-j7200-som-p0.dtsi b/arch/arm64/boot/dts/ti/k3-j7200-som-p0.dtsi
index fa44ed4c17d5..198408fdb017 100644
--- a/arch/arm64/boot/dts/ti/k3-j7200-som-p0.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-j7200-som-p0.dtsi
@@ -140,6 +140,37 @@
 	flash@0,0 {
 		compatible = "cypress,hyperflash", "cfi-flash";
 		reg = <0x00 0x00 0x4000000>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "hbmc.tiboot3";
+				reg = <0x0 0x100000>;
+			};
+
+			partition@...000 {
+				label = "hbmc.tispl";
+				reg = <0x100000 0x200000>;
+			};
+
+			partition@...000 {
+				label = "hbmc.u-boot";
+				reg = <0x300000 0x400000>;
+			};
+
+			partition@...000 {
+				label = "hbmc.env";
+				reg = <0x700000 0x40000>;
+			};
+
+			partition@...000 {
+				label = "hbmc.rootfs";
+				reg = <0x800000 0x3800000>;
+			};
+		};
 	};
 };
 
@@ -229,5 +260,46 @@
 		cdns,tchsh-ns = <60>;
 		cdns,tslch-ns = <60>;
 		cdns,read-delay = <4>;
+
+		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