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[PATCH v3 3/4] soc: qcom: Add device tree binding for GLINK RPM

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Add device tree binding documentation for the Qualcomm GLINK RPM, used
for communication with the Resource Power Management subsystem in
various Qualcomm SoCs.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---

Changes since v2:
- Replace qcom,ipc syscon with a "doorbell"

Changes since v1:
- None

 .../devicetree/bindings/soc/qcom/qcom,glink.txt    | 73 ++++++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/soc/qcom/qcom,glink.txt

diff --git a/Documentation/devicetree/bindings/soc/qcom/qcom,glink.txt b/Documentation/devicetree/bindings/soc/qcom/qcom,glink.txt
new file mode 100644
index 000000000000..4c8983f0dcb0
--- /dev/null
+++ b/Documentation/devicetree/bindings/soc/qcom/qcom,glink.txt
@@ -0,0 +1,73 @@
+Qualcomm RPM GLINK binding
+
+This binding describes the Qualcomm RPM GLINK, a fifo based mechanism for
+communication with the Resource Power Management system on various Qualcomm
+platforms.
+
+- compatible:
+	Usage: required
+	Value type: <stringlist>
+	Definition: must be "qcom,glink-rpm"
+
+- interrupts:
+	Usage: required
+	Value type: <prop-encoded-array>
+	Definition: should specify the IRQ used by the remote processor to
+		    signal this processor about communication related events
+
+- qcom,rpm-msg-ram:
+	Usage: required
+	Value type: <prop-encoded-array>
+	Definition: handle to RPM message memory resource
+
+- doorbells:
+	Usage: required
+	Value type: <prop-encoded-array>
+	Definition: reference to the "rpm_hlos" doorbell in APCS, as described
+		    in doorbell.txt
+
+= GLINK DEVICES
+Each subnode of the GLINK node represent function tied to a virtual
+communication channel. The name of the nodes are not important. The properties
+of these nodes are defined by the individual bindings for the specific function
+- but must contain the following property:
+
+- qcom,glink-channels:
+	Usage: required
+	Value type: <stringlist>
+	Definition: a list of channels tied to this function, used for matching
+		    the function to a set of virtual channels
+
+= EXAMPLE
+The following example represents the GLINK RPM node on a MSM8996 device, with
+the function for the "rpm_request" channel defined, which is used for
+regualtors and root clocks.
+
+	apcs_glb: apcs-glb@9820000 {
+		compatible = "qcom,msm8996-apcs-hmss-global";
+		reg = <0x9820000 0x1000>;
+
+		#doorbell-cells = <1>;
+	};
+
+	rpm_msg_ram: memory@68000 {
+		compatible = "qcom,rpm-msg-ram";
+		reg = <0x68000 0x6000>;
+	};
+
+        rpm-glink {
+		compatible = "qcom,glink-rpm";
+
+		interrupts = <GIC_SPI 168 IRQ_TYPE_EDGE_RISING>;
+
+		qcom,rpm-msg-ram = <&rpm_msg_ram>;
+
+		doorbells = <&apcs_glb 0>;
+
+		rpm-requests {
+			compatible = "qcom,rpm-msm8996";
+			qcom,glink-channels = "rpm_requests";
+
+			...
+		};
+	};
-- 
2.12.0

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[PATCH v3 1/4] dt-bindings: Introduce doorbell binding Bjorn Andersson <bjorn.andersson@linaro.org> - 2017-05-03 07:40 +0200
  [PATCH v3 2/4] soc: qcom: Introduce APCS IPC driver Bjorn Andersson <bjorn.andersson@linaro.org> - 2017-05-03 07:40 +0200
    RE: [PATCH v3 2/4] soc: qcom: Introduce APCS IPC driver Loic PALLARDY <loic.pallardy@st.com> - 2017-05-03 11:30 +0200
      Re: [PATCH v3 2/4] soc: qcom: Introduce APCS IPC driver Jassi Brar <jassisinghbrar@gmail.com> - 2017-05-03 12:00 +0200
        Re: [PATCH v3 2/4] soc: qcom: Introduce APCS IPC driver Bjorn Andersson <bjorn.andersson@linaro.org> - 2017-05-04 07:50 +0200
          Re: [PATCH v3 2/4] soc: qcom: Introduce APCS IPC driver Jassi Brar <jassisinghbrar@gmail.com> - 2017-05-04 10:00 +0200
            Re: [PATCH v3 2/4] soc: qcom: Introduce APCS IPC driver Bjorn Andersson <bjorn.andersson@linaro.org> - 2017-05-04 18:20 +0200
              Re: [PATCH v3 2/4] soc: qcom: Introduce APCS IPC driver Jassi Brar <jassisinghbrar@gmail.com> - 2017-05-04 19:10 +0200
  [PATCH v3 3/4] soc: qcom: Add device tree binding for GLINK RPM Bjorn Andersson <bjorn.andersson@linaro.org> - 2017-05-03 07:40 +0200
  [PATCH v3 4/4] rpmsg: Introduce Qualcomm RPM glink driver Bjorn Andersson <bjorn.andersson@linaro.org> - 2017-05-03 07:40 +0200

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