dt-bindings: power: reset: Add qcom pon binding

The Power On device for Qcom PM 8xxx is a MFD supporting pwrkey and
resin along with the Android reboot-mode.

Add the binding describing this.

Suggested-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>

diff --git a/Documentation/devicetree/bindings/power/reset/qcom,pon.txt b/Documentation/devicetree/bindings/power/reset/qcom,pon.txt
new file mode 100644 (file)
index 0000000..f32cdd3
--- /dev/null
+++ b/Documentation/devicetree/bindings/power/reset/qcom,pon.txt
@@ -0,0 +1,35 @@
+Qualcomm PON Device
+
+The Power On device for Qualcomm PM8xxx is MFD supporting pwrkey
+along with the Android reboot-mode.
+
+This DT node has pwrkey as sub node.
+
+Required Properties:
+-compatible: "qcom,pm8916-pon"
+-reg: Specifies the physical address of the pon register
+
+Optional subnode:
+-pwrkey: Specifies the subnode pwrkey and should follow the
+ qcom,pm8941-pwrkey.txt description.
+
+The rest of the properties should follow the generic reboot-mode description
+found in reboot-mode.txt
+
+Example:
+
+       pon@800 {
+               compatible = "qcom,pm8916-pon";
+
+               reg = <0x800>;
+               mode-bootloader = <0x2>;
+               mode-recovery = <0x1>;
+
+               pwrkey {
+                       compatible = "qcom,pm8941-pwrkey";
+                       interrupts = <0x0 0x8 0 IRQ_TYPE_EDGE_BOTH>;
+                       debounce = <15625>;
+                       bias-pull-up;
+                       linux,code = <KEY_POWER>;
+               };
+       };