linux-kernel - [PATCH] ARM: dts: microchip: sama7g54_curiosity: Add fixed-partitions for spi-nor flash

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Message-ID: <20250429064547.5807-1-mihai.sain@microchip.com>
Date: Tue, 29 Apr 2025 09:45:47 +0300
From: Mihai Sain <mihai.sain@...rochip.com>
To: <robh@...nel.org>, <krzk+dt@...nel.org>, <conor+dt@...nel.org>,
	<nicolas.ferre@...rochip.com>, <alexandre.belloni@...tlin.com>,
	<claudiu.beznea@...on.dev>, <devicetree@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>
CC: Mihai Sain <mihai.sain@...rochip.com>
Subject: [PATCH] ARM: dts: microchip: sama7g54_curiosity: Add fixed-partitions for spi-nor flash

Add fixed-partitions for spi-nor flash to match the at91 boot flow
and layout of the nand flash.
Partitions can be listed from /proc/mtd:

[root@...a7g54 ~]$ cat /proc/mtd | grep qspi
mtd6: 00040000 00001000 "qspi1: at91bootstrap"
mtd7: 00100000 00001000 "qspi1: u-boot"
mtd8: 00040000 00001000 "qspi1: u-boot env"
mtd9: 00080000 00001000 "qspi1: device tree"
mtd10: 00600000 00001000 "qspi1: kernel"

[root@...a7g54 ~]$ mtdinfo /dev/mtd10
mtd10
Name:                           qspi1: kernel
Type:                           nor
Eraseblock size:                4096 bytes, 4.0 KiB
Amount of eraseblocks:          1536 (6291456 bytes, 6.0 MiB)
Minimum input/output unit size: 1 byte
Sub-page size:                  1 byte
Character device major/minor:   90:20
Bad blocks are allowed:         false
Device is writable:             true

Signed-off-by: Mihai Sain <mihai.sain@...rochip.com>
---
 .../dts/microchip/at91-sama7g54_curiosity.dts | 32 +++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/arch/arm/boot/dts/microchip/at91-sama7g54_curiosity.dts b/arch/arm/boot/dts/microchip/at91-sama7g54_curiosity.dts
index 2dec2218f32c..eb5f27ce1942 100644
--- a/arch/arm/boot/dts/microchip/at91-sama7g54_curiosity.dts
+++ b/arch/arm/boot/dts/microchip/at91-sama7g54_curiosity.dts
@@ -369,6 +369,38 @@ flash@0 {
 		spi-tx-bus-width = <4>;
 		spi-rx-bus-width = <4>;
 		m25p,fast-read;
+		label = "at91-qspi";
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			at91bootstrap@0 {
+				label = "qspi1: at91bootstrap";
+				reg = <0x0 0x40000>;
+			};
+
+			bootloader@...00 {
+				label = "qspi1: u-boot";
+				reg = <0x40000 0x100000>;
+			};
+
+			bootloaderenv@...000 {
+				label = "qspi1: u-boot env";
+				reg = <0x140000 0x40000>;
+			};
+
+			dtb@...000 {
+				label = "qspi1: device tree";
+				reg = <0x180000 0x80000>;
+			};
+
+			kernel@...000 {
+				label = "qspi1: kernel";
+				reg = <0x200000 0x600000>;
+			};
+		};
 	};
 };
 

base-commit: ca91b9500108d4cf083a635c2e11c884d5dd20ea
-- 
2.49.0