linux-kernel - [PATCH v4] dt-bindings: serial: brcm,bcm2835-aux-uart: convert to dtschema

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Date: Thu, 25 Apr 2024 18:25:50 +0200
From: Pratik Farkase <pratikfarkase94@...il.com>
To: 
Cc: Pratik Farkase <pratik.farkase@...sweden.com>,
	Florian Fainelli <florian.fainelli@...adcom.com>,
	Conor Dooley <conor.dooley@...rochip.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jiri Slaby <jirislaby@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Broadcom internal kernel review list <bcm-kernel-feedback-list@...adcom.com>,
	Ray Jui <rjui@...adcom.com>,
	Scott Branden <sbranden@...adcom.com>,
	Pratik Farkase <pratikfarkase94@...il.com>,
	Stefan Wahren <wahrenst@....net>,
	linux-kernel@...r.kernel.org,
	linux-serial@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-rpi-kernel@...ts.infradead.org,
	linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v4] dt-bindings: serial: brcm,bcm2835-aux-uart: convert to dtschema

Convert the Broadcom BCM2835 Auxiliary UART to newer DT schema.
Created DT schema based on the .txt file which had
`compatible`, `reg` `clocks` and `interrupts` as the
required properties. This binding is used by Broadcom BCM2835
SOC used in some Raspberry PI boards.
Changes from original file:
Implemented complete example which the original txt binding lacked.

Acked-by: Florian Fainelli <florian.fainelli@...adcom.com>
Reviewed-by: Conor Dooley <conor.dooley@...rochip.com>
Signed-off-by: Pratik Farkase <pratik.farkase@...sweden.com>
---
Changes in v4
- Added Acked-by flag
---
Changes in v3
- Removed unecessary headers from example
- Removed the `uart1` label
- Added Reviewed-by flag
---
Changes in v2
- Updated Maintainers list according to feedback
- Fixed typo `Auxiliar` to `Auxiliary`
---
---
 .../bindings/serial/brcm,bcm2835-aux-uart.txt | 18 --------
 .../serial/brcm,bcm2835-aux-uart.yaml         | 46 +++++++++++++++++++
 2 files changed, 46 insertions(+), 18 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/serial/brcm,bcm2835-aux-uart.txt
 create mode 100644 Documentation/devicetree/bindings/serial/brcm,bcm2835-aux-uart.yaml

diff --git a/Documentation/devicetree/bindings/serial/brcm,bcm2835-aux-uart.txt b/Documentation/devicetree/bindings/serial/brcm,bcm2835-aux-uart.txt
deleted file mode 100644
index b5cc6297cd1b..000000000000
--- a/Documentation/devicetree/bindings/serial/brcm,bcm2835-aux-uart.txt
+++ /dev/null
@@ -1,18 +0,0 @@
-* BCM2835 AUXILIAR UART
-
-Required properties:
-
-- compatible: "brcm,bcm2835-aux-uart"
-- reg: The base address of the UART register bank.
-- interrupts: A single interrupt specifier.
-- clocks: Clock driving the hardware; used to figure out the baud rate
-  divisor.
-
-Example:
-
-	uart1: serial@...15040 {
-		compatible = "brcm,bcm2835-aux-uart";
-		reg = <0x7e215040 0x40>;
-		interrupts = <1 29>;
-		clocks = <&aux BCM2835_AUX_CLOCK_UART>;
-	};
diff --git a/Documentation/devicetree/bindings/serial/brcm,bcm2835-aux-uart.yaml b/Documentation/devicetree/bindings/serial/brcm,bcm2835-aux-uart.yaml
new file mode 100644
index 000000000000..8a31eb56b865
--- /dev/null
+++ b/Documentation/devicetree/bindings/serial/brcm,bcm2835-aux-uart.yaml
@@ -0,0 +1,46 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/serial/brcm,bcm2835-aux-uart.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: BCM2835 AUXILIARY UART
+
+maintainers:
+  - Pratik Farkase <pratikfarkase94@...il.com>
+  - Florian Fainelli <florian.fainelli@...adcom.com>
+  - Stefan Wahren <wahrenst@....net>
+
+allOf:
+  - $ref: serial.yaml
+
+properties:
+  compatible:
+    const: brcm,bcm2835-aux-uart
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/bcm2835-aux.h>
+    serial@...15040 {
+        compatible = "brcm,bcm2835-aux-uart";
+        reg = <0x7e215040 0x40>;
+        interrupts = <1 29>;
+        clocks = <&aux BCM2835_AUX_CLOCK_UART>;
+    };
-- 
2.34.1