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From:   Jonas Gorski <jonas.gorski@gmail.com>
To:     Mark Brown <broonie@kernel.org>, Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Conor Dooley <conor+dt@kernel.org>
Cc:     linux-spi@vger.kernel.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org
Subject: [PATCH] dt-bindings: spi: convert spi-brcm63xx.txt to YAML
Date:   Sat, 15 Jul 2023 12:02:10 +0200
Message-Id: <20230715100211.14726-1-jonas.gorski@gmail.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

Changes done during conversion:

* added a description, lifting and adapting the limitation sentence from
  brcm,bcm63xx-hsspi.yml
* added appropriate compatibles for all SoCs that are supported by
  bcm63xx/bmips

Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
---
 .../bindings/spi/brcm,bcm63xx-spi.yaml        | 71 +++++++++++++++++++
 .../devicetree/bindings/spi/spi-bcm63xx.txt   | 33 ---------
 MAINTAINERS                                   |  2 +-
 3 files changed, 72 insertions(+), 34 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/spi/brcm,bcm63xx-spi.yaml
 delete mode 100644 Documentation/devicetree/bindings/spi/spi-bcm63xx.txt

diff --git a/Documentation/devicetree/bindings/spi/brcm,bcm63xx-spi.yaml b/Documentation/devicetree/bindings/spi/brcm,bcm63xx-spi.yaml
new file mode 100644
index 000000000000..53e0c058b8b1
--- /dev/null
+++ b/Documentation/devicetree/bindings/spi/brcm,bcm63xx-spi.yaml
@@ -0,0 +1,71 @@
+# SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/spi/brcm,bcm63xx-spi.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Broadcom BCM6348/BCM6358 SPI controller
+
+maintainers:
+  - Jonas Gorski <jonas.gorski@gmail.com>
+
+description: |
+  Broadcom "Low Speed" SPI controller found in many older MIPS based Broadband
+  SoCs.
+
+  This controller has a limitation that can not keep the chip select line active
+  between the SPI transfers within the same SPI message. This can terminate the
+  transaction to some SPI devices prematurely. The issue can be worked around by
+  the controller's prepend mode.
+
+allOf:
+  - $ref: spi-controller.yaml#
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - brcm,bcm6368-spi
+              - brcm,bcm6362-spi
+              - brcm,bcm63268-spi
+          - const: brcm,bcm6358-spi
+      - const: brcm,bcm6348-spi
+      - const: brcm,bcm6358-spi
+
+  reg:
+    items:
+      - description: main registers
+
+  clocks:
+    items:
+      - description: SPI master reference clock
+
+  clock-names:
+    items:
+      - const: spi
+
+  interrupts:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - interrupts
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    spi@10000800 {
+        compatible = "brcm,bcm6368-spi", "brcm,bcm6358-spi";
+        reg = <0x10000800 0x70c>;
+        interrupts = <1>;
+        clocks = <&clkctl 9>;
+        clock-names = "spi";
+        num-cs = <5>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+    };
diff --git a/Documentation/devicetree/bindings/spi/spi-bcm63xx.txt b/Documentation/devicetree/bindings/spi/spi-bcm63xx.txt
deleted file mode 100644
index 1c16f6692613..000000000000
--- a/Documentation/devicetree/bindings/spi/spi-bcm63xx.txt
+++ /dev/null
@@ -1,33 +0,0 @@
-Binding for Broadcom BCM6348/BCM6358 SPI controller
-
-Required properties:
-- compatible: must contain one of "brcm,bcm6348-spi", "brcm,bcm6358-spi".
-- reg: Base address and size of the controllers memory area.
-- interrupts: Interrupt for the SPI block.
-- clocks: phandle of the SPI clock.
-- clock-names: has to be "spi".
-- #address-cells: <1>, as required by generic SPI binding.
-- #size-cells: <0>, also as required by generic SPI binding.
-
-Optional properties:
-- num-cs: some controllers have less than 8 cs signals. Defaults to 8
-  if absent.
-
-Child nodes as per the generic SPI binding.
-
-Example:
-
-	spi@10000800 {
-		compatible = "brcm,bcm6368-spi", "brcm,bcm6358-spi";
-		reg = <0x10000800 0x70c>;
-
-		interrupts = <1>;
-
-		clocks = <&clkctl 9>;
-		clock-names = "spi";
-
-		num-cs = <5>;
-
-		#address-cells = <1>;
-		#size-cells = <0>;
-	};
diff --git a/MAINTAINERS b/MAINTAINERS
index 238f50f9498e..3cb77cdb92f7 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -4125,7 +4125,7 @@ BROADCOM BCM6348/BCM6358 SPI controller DRIVER
 M:	Jonas Gorski <jonas.gorski@gmail.com>
 L:	linux-spi@vger.kernel.org
 S:	Odd Fixes
-F:	Documentation/devicetree/bindings/spi/spi-bcm63xx.txt
+F:	Documentation/devicetree/bindings/spi/brcm,bcm63xx-spi.yaml
 F:	drivers/spi/spi-bcm63xx.c
 
 BROADCOM ETHERNET PHY DRIVERS
-- 
2.34.1