[PATCH linux dev-5.3 1/2] ARM: dts: Add 128MiB OpenBMC flash layout

[Joel Stanley]

From: Brad Bishop <bradleyb at fuzziesquirrel.com>

This is an alternate layout used by OpenBMC systems that require more
space on the BMC's flash. In addition to more space for the rootfs, it
supports a larger u-boot and Linux kernel FIT image.

The division of space is as follows:

 u-boot + env: 1MB
 kernel/FIT: 9MB
 rwfs: 86MB
 rofs: 32MB

OpenBMC-Staging-Count: 1
Signed-off-by: Brad Bishop <bradleyb at fuzziesquirrel.com>
Signed-off-by: Joel Stanley <joel at jms.id.au>
---
v2: adjust layout to have larger u-boot and kernel
---
 .../boot/dts/openbmc-flash-layout-128.dtsi    | 32 +++++++++++++++++++
 1 file changed, 32 insertions(+)
 create mode 100644 arch/arm/boot/dts/openbmc-flash-layout-128.dtsi

diff --git a/arch/arm/boot/dts/openbmc-flash-layout-128.dtsi b/arch/arm/boot/dts/openbmc-flash-layout-128.dtsi
new file mode 100644
index 000000000000..05101a38c5bd
--- /dev/null
+++ b/arch/arm/boot/dts/openbmc-flash-layout-128.dtsi
@@ -0,0 +1,32 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+partitions {
+	compatible = "fixed-partitions";
+	#address-cells = <1>;
+	#size-cells = <1>;
+
+	u-boot at 0 {
+		reg = <0x0 0xe0000>; // 896KB
+		label = "u-boot";
+	};
+
+	u-boot-env at e0000 {
+		reg = <0xe0000 0x20000>; // 128KB
+		label = "u-boot-env";
+	};
+
+	kernel at 100000 {
+		reg = <0x100000 0x900000>; // 9MB
+		label = "kernel";
+	};
+
+	rofs at a00000 {
+		reg = <0xa00000 0x5600000>; // 86MB
+		label = "rofs";
+	};
+
+	rwfs at 6000000 {
+		reg = <0x6000000 0x2000000>; // 32MB
+		label = "rwfs";
+	};
+};
-- 
2.23.0