linux-kernel - [PATCH v2 1/2] arm64: dts: uDPU: update partition table

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Date:   Tue, 22 Mar 2022 11:58:56 +0100
From:   Robert Marko <robert.marko@...tura.hr>
To:     andrew@...n.ch, gregory.clement@...tlin.com,
        sebastian.hesselbarth@...il.com, robh+dt@...nel.org,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, pali@...nel.org, marek.behun@....cz
Cc:     Robert Marko <robert.marko@...tura.hr>
Subject: [PATCH v2 1/2] arm64: dts: uDPU: update partition table

Partition currently called "uboot" does not only contain U-boot, but
rather it contains TF-A, U-boot and U-boot environment.

So, to avoid accidentally deleting the U-boot environment which is
located at 0x180000 split the partition.

"uboot" is not the correct name as you can't boot these boards with U-boot
only, TF-A must be present as well, so rename the "uboot" partition to
"firmware".

While we are here, describe the NOR node as "spi-flash@0" instead of
"m25p80@0" which is the old SPI-NOR driver name.

This won't break booting for existing devices as the SoC-s BootROM is not
partition aware at all, it will simply try booting from 0x0 of the
boot device that is set by bootstrap pins.

This will however prevent accidental or automated flashing of just U-boot
to the partition.

Signed-off-by: Robert Marko <robert.marko@...tura.hr>
---
Changes in v2:
* Update the commit description by adressing ABI breaking concerns
---
 arch/arm64/boot/dts/marvell/armada-3720-uDPU.dts | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/arch/arm64/boot/dts/marvell/armada-3720-uDPU.dts b/arch/arm64/boot/dts/marvell/armada-3720-uDPU.dts
index 95d46e8d081c..ac64949bb53e 100644
--- a/arch/arm64/boot/dts/marvell/armada-3720-uDPU.dts
+++ b/arch/arm64/boot/dts/marvell/armada-3720-uDPU.dts
@@ -99,7 +99,7 @@ &spi0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&spi_quad_pins>;

-	m25p80@0 {
+	spi-flash@0 {
 		compatible = "jedec,spi-nor";
 		reg = <0>;
 		spi-max-frequency = <54000000>;
@@ -108,10 +108,15 @@ partitions {
 			compatible = "fixed-partitions";
 			#address-cells = <1>;
 			#size-cells = <1>;
-			/* only bootloader is located on the SPI */
+
 			partition@0 {
-				label = "uboot";
-				reg = <0 0x400000>;
+				label = "firmware";
+				reg = <0x0 0x180000>;
+			};
+
+			partition@...000 {
+				label = "u-boot-env";
+				reg = <0x180000 0x10000>;
 			};
 		};
 	};
-- 
2.35.1