Add device tree binding document for reboot-mode driver
Cc: Andy Yan <[email protected]>
Cc: Rob Herring <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: Thierry Reding <[email protected]>
Cc: Heiko Stübner <[email protected]>
Cc: Caesar Wang <[email protected]>
Cc: Kees Cook <[email protected]>
Cc: Guodong Xu <[email protected]>
Cc: Haojian Zhuang <[email protected]>
Cc: Vishal Bhoj <[email protected]>
Cc: Bjorn Andersson <[email protected]>
Cc: [email protected]
Cc: Android Kernel Team <[email protected]>
Signed-off-by: John Stultz <[email protected]>
---
.../bindings/power/reset/sram-reboot-mode.txt | 35 ++++++++++++++++++++++
1 file changed, 35 insertions(+)
create mode 100644
Documentation/devicetree/bindings/power/reset/sram-reboot-mode.txt
diff --git a/Documentation/devicetree/bindings/power/reset/sram-reboot-mode.txt
b/Documentation/devicetree/bindings/power/reset/sram-reboot-mode.txt
new file mode 100644
index 0000000..0a0ed05
--- /dev/null
+++ b/Documentation/devicetree/bindings/power/reset/sram-reboot-mode.txt
@@ -0,0 +1,35 @@
+SRAM reboot mode driver
+
+This driver get reboot mode magic value form reboot-mode driver
+and stores it in a SRAM address. Then the bootloader
+can read it and take different action according to the magic
+value stored.
+
+This DT node should be represented as a sub-node of a "mmio-sram" node.
+
+Required properties:
+- compatible: should be "sram-reboot-mode"
+- reg: offset from the sram range where to store the magic value(in bytes)
+
+The rest of the properties should follow the generic reboot-mode discription
+found in reboot-mode.txt
+
+Example:
+
+ sram@5f01000 {
+ compatible = "mmio-sram";
+ reg = <0x0 0x05f01000 0x0 0x00001000>;
+ ranges = <0x0 0x0 0x05f01000 0x00001000>;
+
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ reboot-mode@0 {
+ compatible = "sram-reboot-mode";
+ reg = <0x0 0x4>;
+
+ mode-normal = <0x77665501>;
+ mode-bootloader = <0x77665500>;
+ mode-recovery = <0x77665502>;
+ };
+ };
--
1.9.1
