Hi,
On 6/9/22 14:30, Sughosh Ganu wrote:
From: Masami Hiramatsu <masami.hirama...@linaro.org>
Add a devicetree-binding YAML file for the FWU metadata on MTD
devices without GPT.
Signed-off-by: Masami Hiramatsu <masami.hirama...@linaro.org>
Signed-off-by: Sughosh Ganu <sughosh.g...@linaro.org>
---
.../firmware/uboot,fwu-mdata-mtd.yaml | 38 +++++++++++++++++++
1 file changed, 38 insertions(+)
create mode 100644 doc/device-tree-bindings/firmware/uboot,fwu-mdata-mtd.yaml
diff --git a/doc/device-tree-bindings/firmware/uboot,fwu-mdata-mtd.yaml
b/doc/device-tree-bindings/firmware/uboot,fwu-mdata-mtd.yaml
new file mode 100644
index 0000000000..4f5404f999
--- /dev/null
+++ b/doc/device-tree-bindings/firmware/uboot,fwu-mdata-mtd.yaml
@@ -0,0 +1,38 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/firmware/u-boot,fwu-mdata-sf.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: FWU metadata on MTD device without GPT
+
+maintainers:
+ - Masami Hiramatsu <masami.hirama...@linaro.org>
+
+properties:
+ compatible:
+ items:
+ - const: u-boot,fwu-mdata-mtd
+
+ fwu-mdata-store:
+ maxItems: 1
+ description: Phandle of the MTD device which contains the FWU medatata.
+
+ mdata-offsets:
+ minItems: 2
+ description: Offsets of the primary and secondary FWU metadata in the NOR
flash.
+
+required:
+ - compatible
+ - fwu-mdata-store
+ - mdata-offsets
+
+additionalProperties: false
+
+examples:
+ - |
+ fwu-mdata {
+ compatible = "u-boot,fwu-mdata-mtd";
+ fwu-mdata-store = <&spi-flash>;
+ mdata-offsets = <0x500000 0x530000>;
+ };
Do you need to have offset her => normally it is already managed by mtd
partition
spi-flash@0 {
#address-cells = <1>;
#size-cells = <1>;
compatible = "spi-flash", "jedec,spi-nor";
....
metadata1: partition@metadata1 {
reg = <0x500000 0x30000>;
label = "metadata1";
};
metadata2: partition@metadata2 {
reg = <0x530000 0x30000>;
label = "metadata2";
};
....
};
So the needed offset information can be found with 2 handles
to the MTD partitions in the device tree !
+ fwu-mdata {
+ compatible = "u-boot,fwu-mdata-mtd";
+ fwu-mdata-store = <&metadata1>, <&metadata2>;
+ };
This proposal can simplify the binding
+ fwu-mdata-store:
+ maxItems: 2
+ description: Phandle of the two MTD partitions which contains the FWU
medatata.
+required:
+ - compatible
+ - fwu-mdata-store
Patrick
