ARM: dts: Add Facebook BMC flash layout

This is the layout used by Facebook BMC systems. It describes the fixed
flash layout of a 32MB mtd device.

Signed-off-by: Tao Ren <taoren@fb.com>
Signed-off-by: Joel Stanley <joel@jms.id.au>

diff --git a/arch/arm/boot/dts/facebook-bmc-flash-layout.dtsi b/arch/arm/boot/dts/facebook-bmc-flash-layout.dtsi
new file mode 100644 (file)
index 0000000..87bb8b5
--- /dev/null
+++ b/arch/arm/boot/dts/facebook-bmc-flash-layout.dtsi
@@ -0,0 +1,42 @@
+// SPDX-License-Identifier: GPL-2.0+
+// Copyright (c) 2018 Facebook Inc.
+
+partitions {
+       compatible = "fixed-partitions";
+       #address-cells = <1>;
+       #size-cells = <1>;
+
+       u-boot@0 {
+               reg = <0x0 0x60000>;
+               label = "u-boot";
+       };
+
+       u-boot-env@60000 {
+               reg = <0x60000 0x20000>;
+               label = "env";
+       };
+
+       fit@80000 {
+               reg = <0x80000 0x1b80000>;
+               label = "fit";
+       };
+
+       /*
+        * "data0" partition is used by several Facebook BMC platforms
+        * as persistent data store.
+        */
+       data0@1c00000 {
+               reg = <0x1c00000 0x400000>;
+               label = "data0";
+       };
+
+       /*
+        * Although the master partition can be created by enabling
+        * MTD_PARTITIONED_MASTER option, below "flash0" partition is
+        * explicitly created to avoid breaking legacy applications.
+        */
+       flash0@0 {
+               reg = <0x0 0x2000000>;
+               label = "flash0";
+       };
+};