Barebox state on am335x-phytec-phycore-som
Sam Ravnborg
sam at ravnborg.org
Thu Jul 20 08:06:14 PDT 2017
Hi Martin.
On Thu, Jul 20, 2017 at 01:09:54PM +0000, Martin Hollingsworth wrote:
> Hi,
> I am trying to enable the barebox state framework and use it to
> store the bootchooser variables on the am335x-phytec-phycore-som
> board. I want to do that, so that the variables can be stored
> in EEPROM rather than in NAND (due to write/erase cycles).
>
> I am following the steps from the documentation and from
> the mailing list from 2016
> (http://lists.infradead.org/pipermail/barebox/2016-October/028312.html).
> However, all entries I try to add to the DTS/DTSI files fail
> to compile with a syntax error, even the example dtsi entry
> from the documentation.
>
> Has anyone running a similar configuration and could help
> with some advice what has to be adapted?
> Can anyone recommend a good example code of the barebox state placed on EEPROM?
The following builds. Maybe this is a small step in the right direction.
Just added from state-example.dts and from the documentation.
Sam
diff --git a/arch/arm/dts/am335x-phytec-phycore-som.dts b/arch/arm/dts/am335x-phytec-phycore-som.dts
index f13e0d6bd..f62620be0 100644
--- a/arch/arm/dts/am335x-phytec-phycore-som.dts
+++ b/arch/arm/dts/am335x-phytec-phycore-som.dts
@@ -13,12 +13,41 @@
/ {
model = "Phytec phyCORE AM335x";
compatible = "phytec,phycore-am335x-som", "phytec,am335x-som", "ti,am33xx";
+
+ state: state {
+ magic = <0x27031977>;
+ compatible = "barebox,state";
+ backend-type = "raw";
+ backend = <&backend_state_eeprom>;
+ #address-cells = <1>;
+ #size-cells = <1>;
+ foo {
+ reg = <0x00 0x4>;
+ type = "uint32";
+ default = <0x0>;
+ };
+
+ bar {
+ reg = <0x10 0x4>;
+ type = "enum32";
+ names = "baz", "qux";
+ default = <1>;
+ };
+ };
};
&spi0 {
status = "okay";
};
-
&eeprom {
status = "okay";
+ partitions {
+ compatible = "fixed-partitions";
+ #size-cells = <1>;
+ #address-cells = <1>;
+ backend_state_eeprom: state at 400 {
+ reg = <0x400 0x400>;
+ label = "state-eeprom";
+ };
+ };
};
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