mfd: devicetree: bindings: Add Qualcomm RPM DT binding

Add binding for the Qualcomm Resource Power Manager (RPM) found in 8660,
8960 and 8064 based devices.

Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

1 files changed, 70 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/mfd/qcom-rpm.txt b/Documentation/devicetree/bindings/mfd/qcom-rpm.txt
new file mode 100644
index 000000000000..85e31980017a
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/qcom-rpm.txt
@@ -0,0 +1,70 @@
+Qualcomm Resource Power Manager (RPM)
+
+This driver is used to interface with the Resource Power Manager (RPM) found in
+various Qualcomm platforms. The RPM allows each component in the system to vote
+for state of the system resources, such as clocks, regulators and bus
+frequencies.
+
+- compatible:
+        Usage: required
+        Value type: <string>
+        Definition: must be one of:
+                    "qcom,rpm-apq8064"
+                    "qcom,rpm-msm8660"
+                    "qcom,rpm-msm8960"
+
+- reg:
+        Usage: required
+        Value type: <prop-encoded-array>
+        Definition: base address and size of the RPM's message ram
+
+- interrupts:
+        Usage: required
+        Value type: <prop-encoded-array>
+        Definition: three entries specifying the RPM's:
+                    1. acknowledgement interrupt
+                    2. error interrupt
+                    3. wakeup interrupt
+
+- interrupt-names:
+        Usage: required
+        Value type: <string-array>
+        Definition: must be the three strings "ack", "err" and "wakeup", in order
+
+- #address-cells:
+        Usage: required
+        Value type: <u32>
+        Definition: must be 1
+
+- #size-cells:
+        Usage: required
+        Value type: <u32>
+        Definition: must be 0
+
+- qcom,ipc:
+        Usage: required
+        Value type: <prop-encoded-array>
+
+        Definition: three entries specifying the outgoing ipc bit used for
+                    signaling the RPM:
+                    - phandle to a syscon node representing the apcs registers
+                    - u32 representing offset to the register within the syscon
+                    - u32 representing the ipc bit within the register
+
+
+= EXAMPLE
+
+        #include <dt-bindings/mfd/qcom-rpm.h>
+
+        rpm@108000 {
+                compatible = "qcom,rpm-msm8960";
+                reg = <0x108000 0x1000>;
+                qcom,ipc = <&apcs 0x8 2>;
+
+                interrupts = <0 19 0>, <0 21 0>, <0 22 0>;
+                interrupt-names = "ack", "err", "wakeup";
+
+                #address-cells = <1>;
+                #size-cells = <0>;
+        };
+