[RFC][PATCH 1/3] dt-bindings: power: reset: Add document for sram-reboot-mode driver

[John Stultz <john.stultz@linaro.org>]

Add device tree binding document for reboot-mode driver

Cc: Andy Yan <andy.yan@rock-chips.com>
Cc: Rob Herring <robh@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Thierry Reding <treding@nvidia.com>
Cc: Heiko Stübner <heiko@sntech.de>
Cc: Caesar Wang <wxt@rock-chips.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Guodong Xu <guodong.xu@linaro.org>
Cc: Haojian Zhuang <haojian.zhuang@linaro.org>
Cc: Vishal Bhoj <vishal.bhoj@linaro.org>
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: devicetree@vger.kernel.org
Cc: Android Kernel Team <kernel-team@android.com>
Signed-off-by: John Stultz <john.stultz@linaro.org>
---
 .../bindings/power/reset/sram-reboot-mode.txt      | 47 ++++++++++++++++++++++
 1 file changed, 47 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..33bb132
--- /dev/null
+++ b/Documentation/devicetree/bindings/power/reset/sram-reboot-mode.txt
@@ -0,0 +1,47 @@
+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", "simple-bus"
+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", "simple-bus";
+		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>;
+
+			none {
+				linux,mode = "none";
+				loader,magic = <0x77665501>;
+			};
+
+			bootloader {
+				linux,mode = "bootloader";
+				loader,magic = <0x77665500>;
+			};
+
+			recovery {
+				linux,mode = "recovery";
+				loader,magic = <0x77665502>;
+			};
+		};
+	};
-- 
1.9.1