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Message-Id: <20220401171035.1096670-1-krzysztof.kozlowski@linaro.org>
Date: Fri, 1 Apr 2022 19:10:35 +0200
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Andy Gross <agross@...nel.org>,
Bjorn Andersson <bjorn.andersson@...aro.org>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org
Cc: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: [PATCH] dt-bindings: soc: qcom,smp2p: convert to dtschema
Convert the Qualcomm Shared Memory Point 2 Point bindings to DT Schema.
Changes against original bindings: enforce only specific names of child
nodes, instead of any names.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
---
.../bindings/soc/qcom/qcom,smp2p.txt | 110 -------------
.../bindings/soc/qcom/qcom,smp2p.yaml | 145 ++++++++++++++++++
2 files changed, 145 insertions(+), 110 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/soc/qcom/qcom,smp2p.txt
create mode 100644 Documentation/devicetree/bindings/soc/qcom/qcom,smp2p.yaml
diff --git a/Documentation/devicetree/bindings/soc/qcom/qcom,smp2p.txt b/Documentation/devicetree/bindings/soc/qcom/qcom,smp2p.txt
deleted file mode 100644
index 49e1d72d3648..000000000000
--- a/Documentation/devicetree/bindings/soc/qcom/qcom,smp2p.txt
+++ /dev/null
@@ -1,110 +0,0 @@
-Qualcomm Shared Memory Point 2 Point binding
-
-The Shared Memory Point to Point (SMP2P) protocol facilitates communication of
-a single 32-bit value between two processors. Each value has a single writer
-(the local side) and a single reader (the remote side). Values are uniquely
-identified in the system by the directed edge (local processor ID to remote
-processor ID) and a string identifier.
-
-- compatible:
- Usage: required
- Value type: <string>
- Definition: must be one of:
- "qcom,smp2p"
-
-- interrupts:
- Usage: required
- Value type: <prop-encoded-array>
- Definition: one entry specifying the smp2p notification interrupt
-
-- mboxes:
- Usage: required
- Value type: <prop-encoded-array>
- Definition: reference to the associated doorbell in APCS, as described
- in mailbox/mailbox.txt
-
-- qcom,ipc:
- Usage: required, unless mboxes is specified
- Value type: <prop-encoded-array>
- Definition: three entries specifying the outgoing ipc bit used for
- signaling the remote end of the smp2p edge:
- - 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
-
-- qcom,smem:
- Usage: required
- Value type: <u32 array>
- Definition: two identifiers of the inbound and outbound smem items used
- for this edge
-
-- qcom,local-pid:
- Usage: required
- Value type: <u32>
- Definition: specifies the identifier of the local endpoint of this edge
-
-- qcom,remote-pid:
- Usage: required
- Value type: <u32>
- Definition: specifies the identifier of the remote endpoint of this edge
-
-= SUBNODES
-Each SMP2P pair contain a set of inbound and outbound entries, these are
-described in subnodes of the smp2p device node. The node names are not
-important.
-
-- qcom,entry-name:
- Usage: required
- Value type: <string>
- Definition: specifies the name of this entry, for inbound entries this
- will be used to match against the remotely allocated entry
- and for outbound entries this name is used for allocating
- entries
-
-- interrupt-controller:
- Usage: required for incoming entries
- Value type: <empty>
- Definition: marks the entry as inbound; the node should be specified
- as a two cell interrupt-controller as defined in
- "../interrupt-controller/interrupts.txt"
- If not specified this node will denote the outgoing entry
-
-- #interrupt-cells:
- Usage: required for incoming entries
- Value type: <u32>
- Definition: must be 2 - denoting the bit in the entry and IRQ flags
-
-- #qcom,smem-state-cells:
- Usage: required for outgoing entries
- Value type: <u32>
- Definition: must be 1 - denoting the bit in the entry
-
-= EXAMPLE
-The following example shows the SMP2P setup with the wireless processor,
-defined from the 8974 apps processor's point-of-view. It encompasses one
-inbound and one outbound entry:
-
-wcnss-smp2p {
- compatible = "qcom,smp2p";
- qcom,smem = <431>, <451>;
-
- interrupts = <0 143 1>;
-
- qcom,ipc = <&apcs 8 18>;
-
- qcom,local-pid = <0>;
- qcom,remote-pid = <4>;
-
- wcnss_smp2p_out: master-kernel {
- qcom,entry-name = "master-kernel";
-
- #qcom,smem-state-cells = <1>;
- };
-
- wcnss_smp2p_in: slave-kernel {
- qcom,entry-name = "slave-kernel";
-
- interrupt-controller;
- #interrupt-cells = <2>;
- };
-};
diff --git a/Documentation/devicetree/bindings/soc/qcom/qcom,smp2p.yaml b/Documentation/devicetree/bindings/soc/qcom/qcom,smp2p.yaml
new file mode 100644
index 000000000000..8c362ce3c05b
--- /dev/null
+++ b/Documentation/devicetree/bindings/soc/qcom/qcom,smp2p.yaml
@@ -0,0 +1,145 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/soc/qcom/qcom,smp2p.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm Shared Memory Point 2 Point
+
+maintainers:
+ - Andy Gross <agross@...nel.org>
+ - Bjorn Andersson <bjorn.andersson@...aro.org>
+ - Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
+
+description:
+ The Shared Memory Point to Point (SMP2P) protocol facilitates communication
+ of a single 32-bit value between two processors. Each value has a single
+ writer (the local side) and a single reader (the remote side). Values are
+ uniquely identified in the system by the directed edge (local processor ID to
+ remote processor ID) and a string identifier.
+
+properties:
+ compatible:
+ const: qcom,smp2p
+
+ interrupts:
+ maxItems: 1
+
+ mboxes:
+ maxItems: 1
+ description:
+ Reference to the mailbox representing the outgoing doorbell in APCS for
+ this client.
+
+ qcom,ipc:
+ $ref: /schemas/types.yaml#/definitions/phandle-array
+ items:
+ - items:
+ - description: phandle to a syscon node representing the apcs registers
+ - description: u32 representing offset to the register within the syscon
+ - description: u32 representing the ipc bit within the register
+ description:
+ Three entries specifying the outgoing ipc bit used for signaling the
+ remote end of the smp2p edge.
+
+ qcom,local-pid:
+ $ref: /schemas/types.yaml#/definitions/uint32-array
+ description:
+ The identifier of the local endpoint of this edge.
+
+ qcom,remote-pid:
+ $ref: /schemas/types.yaml#/definitions/uint32-array
+ description:
+ The identifier of the remote endpoint of this edge.
+
+ qcom,smem:
+ $ref: /schemas/types.yaml#/definitions/uint32-array
+ items:
+ maxItems: 2
+ description:
+ Two identifiers of the inbound and outbound smem items used for this edge.
+
+patternProperties:
+ "^master-kernel|slave-kernel|ipa-ap-to-modem|ipa-modem-to-ap$":
+ type: object
+ description:
+ Each SMP2P pair contain a set of inbound and outbound entries, these are
+ described in subnodes of the smp2p device node. The node names are not
+ important.
+
+ properties:
+ interrupt-controller:
+ description:
+ Marks the entry as inbound; the node should be specified as a two
+ cell interrupt-controller. If not specified this node will denote
+ the outgoing entry.
+
+ '#interrupt-cells':
+ const: 2
+
+ qcom,entry-name:
+ $ref: /schemas/types.yaml#/definitions/string
+ description:
+ The name of this entry, for inbound entries this will be used to
+ match against the remotely allocated entry and for outbound entries
+ this name is used for allocating entries.
+
+ '#qcom,smem-state-cells':
+ $ref: /schemas/types.yaml#/definitions/uint32
+ const: 1
+ description:
+ Required for outgoing entries.
+
+ required:
+ - qcom,entry-name
+
+ oneOf:
+ - required:
+ - interrupt-controller
+ - '#interrupt-cells'
+ - required:
+ - '#qcom,smem-state-cells'
+
+ additionalProperties: false
+
+required:
+ - compatible
+ - interrupts
+ - qcom,local-pid
+ - qcom,remote-pid
+ - qcom,smem
+
+oneOf:
+ - required:
+ - mboxes
+ - required:
+ - qcom,ipc
+
+additionalProperties: false
+
+examples:
+ # The following example shows the SMP2P setup with the wireless processor,
+ # defined from the 8974 apps processor's point-of-view. It encompasses one
+ # inbound and one outbound entry.
+ - |
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+ shared-memory {
+ compatible = "qcom,smp2p";
+ qcom,smem = <431>, <451>;
+ interrupts = <GIC_SPI 143 IRQ_TYPE_EDGE_RISING>;
+ qcom,ipc = <&apcs 8 18>;
+ qcom,local-pid = <0>;
+ qcom,remote-pid = <4>;
+
+ wcnss_smp2p_out: master-kernel {
+ qcom,entry-name = "master-kernel";
+ #qcom,smem-state-cells = <1>;
+ };
+
+ wcnss_smp2p_in: slave-kernel {
+ qcom,entry-name = "slave-kernel";
+ interrupt-controller;
+ #interrupt-cells = <2>;
+ };
+ };
--
2.32.0
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