[PATCH] RFC: dt-bindings: soc: qcom: convert GLINK binding to yaml

* [PATCH] RFC: dt-bindings: soc: qcom: convert GLINK binding to yaml
@ 2021-12-18 21:35 David Heidelberg
  2021-12-19 21:57 ` Rob Herring
  2021-12-21 13:19 ` Rob Herring
  0 siblings, 2 replies; 3+ messages in thread
From: David Heidelberg @ 2021-12-18 21:35 UTC (permalink / raw)
  To: Andy Gross, Bjorn Andersson, Rob Herring
  Cc: ~okias/devicetree, David Heidelberg, linux-arm-msm, devicetree,
	linux-kernel

Convert Qualcomm GLINK binding to the yaml syntax.

Signed-off-by: David Heidelberg <david@ixit.cz>
---
 .../bindings/soc/qcom/qcom,glink.txt          |  94 ----------------
 .../bindings/soc/qcom/qcom,glink.yaml         | 106 ++++++++++++++++++
 2 files changed, 106 insertions(+), 94 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/soc/qcom/qcom,glink.txt
 create mode 100644 Documentation/devicetree/bindings/soc/qcom/qcom,glink.yaml

diff --git a/Documentation/devicetree/bindings/soc/qcom/qcom,glink.txt b/Documentation/devicetree/bindings/soc/qcom/qcom,glink.txt
deleted file mode 100644
index 1214192847ac..000000000000
--- a/Documentation/devicetree/bindings/soc/qcom/qcom,glink.txt
+++ /dev/null
@@ -1,94 +0,0 @@
-Qualcomm GLINK edge binding
-
-This binding describes a Qualcomm GLINK edge, a fifo based mechanism for
-communication between subsystem-pairs on various Qualcomm platforms. Two types
-of edges can be described by the binding; the GLINK RPM edge and a SMEM based
-edge.
-
-- compatible:
-	Usage: required for glink-rpm
-	Value type: <stringlist>
-	Definition: must be "qcom,glink-rpm"
-
-- label:
-	Usage: optional
-	Value type: <string>
-	Definition: should specify the subsystem name this edge corresponds to.
-
-- 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,remote-pid:
-	Usage: required for glink-smem
-	Value type: <u32>
-	Definition: specifies the identifier of the remote endpoint of this edge
-
-- qcom,rpm-msg-ram:
-	Usage: required for glink-rpm
-	Value type: <prop-encoded-array>
-	Definition: handle to RPM message memory resource
-
-- mboxes:
-	Usage: required
-	Value type: <prop-encoded-array>
-	Definition: reference to the "rpm_hlos" mailbox in APCS, as described
-		    in mailbox/mailbox.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
-
-- qcom,intents:
-	Usage: optional
-	Value type: <prop-encoded-array>
-	Definition: a list of size,amount pairs describing what intents should
-		    be preallocated for this virtual channel. This can be used
-		    to tweak the default intents available for the channel to
-		    meet expectations of the remote.
-
-= 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
-regulators and root clocks.
-
-	apcs_glb: mailbox@9820000 {
-		compatible = "qcom,msm8996-apcs-hmss-global";
-		reg = <0x9820000 0x1000>;
-
-		#mbox-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>;
-
-		mboxes = <&apcs_glb 0>;
-
-		rpm-requests {
-			compatible = "qcom,rpm-msm8996";
-			qcom,glink-channels = "rpm_requests";
-
-			qcom,intents = <0x400 5
-					0x800 1>;
-			...
-		};
-	};
diff --git a/Documentation/devicetree/bindings/soc/qcom/qcom,glink.yaml b/Documentation/devicetree/bindings/soc/qcom/qcom,glink.yaml
new file mode 100644
index 000000000000..11a7c845ea0a
--- /dev/null
+++ b/Documentation/devicetree/bindings/soc/qcom/qcom,glink.yaml
@@ -0,0 +1,106 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/soc/qcom/qcom,glink.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Qualcomm GLINK edge
+
+description: |
+  Qualcomm GLINK edge, a fifo based mechanism for communication between
+  subsystem-pairs on various Qualcomm platforms. Two types of edges can be
+  described by the binding; the GLINK RPM edge and a SMEM based.
+
+maintainers:
+  - Bjorn Andersson <bjorn.andersson@linaro.org>
+
+properties:
+  $nodename:
+    pattern: "^(rpm-)?glink(-edge)?$"
+
+  compatible:
+    const: qcom,glink-rpm
+
+  label:
+    $ref: /schemas/types.yaml#/definitions/string
+    description: should specify the subsystem name this edge corresponds to
+
+  interrupts:
+    description: >
+      should specify the IRQ used by the remote processor to
+      signal this processor about communication related events
+    maxItems: 1
+
+  mboxes:
+    description: >
+      reference to the "rpm_hlos" mailbox in APCS, as described
+      in mailbox/mailbox.txt
+
+  qcom,remote-pid:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: specifies the identifier of the remote endpoint of this edge
+
+  qcom,rpm-msg-ram:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description: RPM message memory resource
+
+patternProperties:
+  ".*":
+    type: object
+    properties:
+      qcom,glink-channels:
+        $ref: /schemas/types.yaml#/definitions/string
+        description: >
+          a list of channels tied to this function, used for matching
+          the function to a set of virtual channels
+
+      'qcom,intents':
+        $ref: /schemas/types.yaml#/definitions/uint32-array
+        description: >
+          a list of size, amount pairs describing what intents should
+          be preallocated for this virtual channel. This can be used
+          to tweak the default intents available for the channel to
+          meet expectations of the remote
+
+    required:
+      - qcom,glink-channels
+
+    additionalProperties: true
+
+required:
+  - interrupts
+  - mboxes
+  - qcom,smem
+  - qcom,local-pid
+  - qcom,remote-pid
+
+anyOf:
+  - required:
+      - qcom,remote-pid
+  - required:
+      - qcom,rpm-msg-ram
+
+additionalProperties: false
+
+examples:
+  # 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 regulators and root clocks.
+  - |
+    rpm-glink {
+        compatible = "qcom,glink-rpm";
+
+        interrupts = <0 168 1>;
+
+        qcom,rpm-msg-ram = <&rpm_msg_ram>;
+
+        mboxes = <&apcs_glb 0>;
+
+        rpm-requests {
+            compatible = "qcom,rpm-msm8996";
+            qcom,glink-channels = "rpm_requests";
+
+            qcom,intents = <0x400 5
+                            0x800 1>;
+        };
+    };
-- 
2.34.1


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