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ARM: dts: aspeed: Add 128M alt flash layout to NVIDIA MSX4

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Add a 128M layout for the BMC flash chip we didn't boot from. Including
this allows the user to write to each partition on the alternate spi
chip. This dtsi follows the existing standard of using the same layout
as non alt version and prepending `alt` to each partition's name.

[arj: Update subject, elide test demonstration]

Signed-off-by: Marc Olberding <molberding@nvidia.com>
Link: https://patch.msgid.link/20260120-alt-128-v4-1-0e5c491a532c@nvidia.com
Signed-off-by: Andrew Jeffery <andrew@codeconstruct.com.au>
This commit is contained in:
Marc Olberding 2026-01-20 12:34:14 -08:00 committed by Andrew Jeffery
parent 36c1cea299
commit 62f0fd7599
2 changed files with 33 additions and 0 deletions
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1
arch/arm/boot/dts/aspeed/aspeed-bmc-nvidia-msx4-bmc.dts
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@ -67,6 +67,7 @@ flash@1 {
spi-tx-bus-width = <1>;
spi-rx-bus-width = <1>;
status = "okay";
#include "openbmc-flash-layout-128-alt.dtsi"
};
};

32
arch/arm/boot/dts/aspeed/openbmc-flash-layout-128-alt.dtsi Normal file
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@ -0,0 +1,32 @@
// SPDX-License-Identifier: GPL-2.0+
partitions {
compatible = "fixed-partitions";
#address-cells = <1>;
#size-cells = <1>;
u-boot@0 {
reg = <0x0 0xe0000>; // 896KB
label = "alt-u-boot";
};
u-boot-env@e0000 {
reg = <0xe0000 0x20000>; // 128KB
label = "alt-u-boot-env";
};
kernel@100000 {
reg = <0x100000 0x900000>; // 9MB
label = "alt-kernel";
};
rofs@a00000 {
reg = <0xa00000 0x5600000>; // 86MB
label = "alt-rofs";
};
rwfs@6000000 {
reg = <0x6000000 0x2000000>; // 32MB
label = "alt-rwfs";
};
};