dt-bindings: mailbox: ti,secure-proxy: Convert to yaml

Commit Message

Nishanth Menon April 13, 2021, 5:12 p.m. UTC

Convert the ti,secure-proxy to yaml for better checks and documentation.
Differences being mostly in the examples:
- I've dropped the example usage of mailbox client, it is better done in
  tisci node definition
- Switched reg usage for address-cells and size-cells 1 - aligned with
  schema checks as well
- included header in example for buildable example

NOTE: The following warning is generated since we do include the header
in the example, but this is a false positive warning.
  WARNING: DT binding docs and includes should be a separate patch. See: Documentation/devicetree/bindings/submitting-patches.rst

Signed-off-by: Nishanth Menon <[e-mail]>
---
 .../bindings/mailbox/ti,secure-proxy.txt      | 50 -------------
 .../bindings/mailbox/ti,secure-proxy.yaml     | 72 +++++++++++++++++++
 2 files changed, 72 insertions(+), 50 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/mailbox/ti,secure-proxy.txt
 create mode 100644 Documentation/devicetree/bindings/mailbox/ti,secure-proxy.yaml

Comments

Nishanth Menon April 13, 2021, 10:32 p.m. UTC | #1

On 12:12-20210413, Nishanth Menon wrote:
[...]
> +properties:
> +  $nodename:
> +    pattern: "^mailbox@[0-9a-f]+$"
> +
> +  compatible:
> +    const: ti,am654-secure-proxy
> +
> +  "#mbox-cells":
> +    const: 1
> +
> +  reg-names:
> +    items:
> +      - const: target_data
> +      - const: rt
> +      - const: scfg
> +
> +  reg:
> +    minItems: 3
> +
> +  interrupt-names:
> +    minItems: 1
> +    description:
> +      Contains the interrupt name information for the Rx interrupt path for
> +      secure proxy.
> +
> +  interrupts:
> +    minItems: 1
> +    description:
> +      Contains the interrupt information for the Rx interrupt path for secure


I think I can strengthen it quite a bit here. let me post a v2 further
that has lesser information loss in the conversion and checks are
stronger.

Patch

diff --git a/Documentation/devicetree/bindings/mailbox/ti,secure-proxy.txt b/Documentation/devicetree/bindings/mailbox/ti,secure-proxy.txt
deleted file mode 100644
index 6c9c7daf0f5c..000000000000
--- a/Documentation/devicetree/bindings/mailbox/ti,secure-proxy.txt
+++ /dev/null
@@ -1,50 +0,0 @@ 
-Texas Instruments' Secure Proxy
-========================================
-
-The Texas Instruments' secure proxy is a mailbox controller that has
-configurable queues selectable at SoC(System on Chip) integration. The
-Message manager is broken up into different address regions that are
-called "threads" or "proxies" - each instance is unidirectional and is
-instantiated at SoC integration level by system controller to indicate
-receive or transmit path.
-
-Message Manager Device Node:
-===========================
-Required properties:
---------------------
-- compatible:		Shall be "ti,am654-secure-proxy"
-- reg-names 		target_data - Map the proxy data region
-			rt - Map the realtime status region
-			scfg - Map the configuration region
-- reg:			Contains the register map per reg-names.
-- #mbox-cells		Shall be 1 and shall refer to the transfer path
-			called thread.
-- interrupt-names:	Contains interrupt names matching the rx transfer path
-			for a given SoC. Receive interrupts shall be of the
-			format: "rx_<PID>".
-- interrupts:		Contains the interrupt information corresponding to
-			interrupt-names property.
-
-Example(AM654):
-------------
-
-	secure_proxy: mailbox@32c00000 {
-		compatible = "ti,am654-secure-proxy";
-		#mbox-cells = <1>;
-		reg-names = "target_data", "rt", "scfg";
-		reg = <0x0 0x32c00000 0x0 0x100000>,
-		      <0x0 0x32400000 0x0 0x100000>,
-		      <0x0 0x32800000 0x0 0x100000>;
-		interrupt-names = "rx_011";
-		interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>;
-	};
-
-	dmsc: dmsc {
-		[...]
-		mbox-names = "rx", "tx";
-		# RX Thread ID is 11
-		# TX Thread ID is 13
-		mboxes= <&secure_proxy 11>,
-			<&secure_proxy 13>;
-		[...]
-	};
diff --git a/Documentation/devicetree/bindings/mailbox/ti,secure-proxy.yaml b/Documentation/devicetree/bindings/mailbox/ti,secure-proxy.yaml
new file mode 100644
index 000000000000..88eb32cb5678
--- /dev/null
+++ b/Documentation/devicetree/bindings/mailbox/ti,secure-proxy.yaml
@@ -0,0 +1,72 @@ 
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mailbox/ti,secure-proxy.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments' Secure Proxy
+
+maintainers:
+  - Nishanth Menon <[e-mail]>
+
+description: |
+  The Texas Instruments' secure proxy is a mailbox controller that has
+  configurable queues selectable at SoC(System on Chip) integration. The
+  Message manager is broken up into different address regions that are
+  called "threads" or "proxies" - each instance is unidirectional and is
+  instantiated at SoC integration level by system controller to indicate
+  receive or transmit path.
+
+properties:
+  $nodename:
+    pattern: "^mailbox@[0-9a-f]+$"
+
+  compatible:
+    const: ti,am654-secure-proxy
+
+  "#mbox-cells":
+    const: 1
+
+  reg-names:
+    items:
+      - const: target_data
+      - const: rt
+      - const: scfg
+
+  reg:
+    minItems: 3
+
+  interrupt-names:
+    minItems: 1
+    description:
+      Contains the interrupt name information for the Rx interrupt path for
+      secure proxy.
+
+  interrupts:
+    minItems: 1
+    description:
+      Contains the interrupt information for the Rx interrupt path for secure
+      proxy.
+
+required:
+  - compatible
+  - reg-names
+  - reg
+  - interrupts
+  - "#mbox-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    secure_proxy: mailbox@32c00000 {
+          compatible = "ti,am654-secure-proxy";
+          #mbox-cells = <1>;
+          reg-names = "target_data", "rt", "scfg";
+          reg = <0x32c00000 0x100000>,
+                <0x32400000 0x100000>,
+                <0x32800000 0x100000>;
+          interrupt-names = "rx_011";
+          interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>;
+    };