linux-kernel - [PATCH v3] dt-bindings: mmc: ti-omap2420-mmc: convert text based binding to json schema

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Message-Id: <20250520-ti-omap-v3-1-aa845b301c4c@gmail.com>
Date: Tue, 20 May 2025 13:12:03 +0000
From: Charan Pedumuru <charan.pedumuru@...il.com>
To: Ulf Hansson <ulf.hansson@...aro.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Tony Lindgren <tony@...mide.com>
Cc: linux-mmc@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Charan Pedumuru <charan.pedumuru@...il.com>
Subject: [PATCH v3] dt-bindings: mmc: ti-omap2420-mmc: convert text based
 binding to json schema

Convert TI MMC host controller binding to YAML format.
Changes during Conversion:
- Add new properties 'dma', 'dma-names' under required.
- Define two separate phandles for 'dmas' in the examples.
- Include appropriate header file for interrupts and use
  it in the examples.

Signed-off-by: Charan Pedumuru <charan.pedumuru@...il.com>
---
Changes in v3:
- Changed maintainer to Tony Lindgren.
- Redefine 'ti,hwmods' with $ref under properties.
- Modify subject prefix with ti,omap2420-mmc.
- Link to v2: https://lore.kernel.org/r/20250519-ti-omap-v2-1-2a0dbc08fb9c@gmail.com

Changes in v2:
- Added include statement for irq interrupt controller and
  modified the interrupts under property to use header.
- Changed maintainer to Rob Herring.
- Defined two seperate phandles for 'dmas' under examples.
- Rename the YAML file name to the compatible 'ti,omap2420-mmc'.
- Added missing type and maxItems to 'ti,hwmods' under properties.
- Link to v1: https://lore.kernel.org/r/20250510-ti-omap-v1-1-588b0ccb1823@gmail.com
---
 .../devicetree/bindings/mmc/ti,omap2420-mmc.yaml   | 66 ++++++++++++++++++++++
 Documentation/devicetree/bindings/mmc/ti-omap.txt  | 26 ---------
 2 files changed, 66 insertions(+), 26 deletions(-)

diff --git a/Documentation/devicetree/bindings/mmc/ti,omap2420-mmc.yaml b/Documentation/devicetree/bindings/mmc/ti,omap2420-mmc.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..61fd4244b92cb3b76db1a765933ebb2af2ccae28
--- /dev/null
+++ b/Documentation/devicetree/bindings/mmc/ti,omap2420-mmc.yaml
@@ -0,0 +1,66 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mmc/ti,omap2420-mmc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: TI MMC host controller for OMAP1 and 2420
+
+description:
+  The MMC Host controller for TI OMAP1 and 2420 family provides
+  an interface for MMC, SD and SDIO types of memory cards.
+
+allOf:
+  - $ref: mmc-controller.yaml
+
+maintainers:
+  - Tony Lindgren <tony@...mide.com>
+
+properties:
+  compatible:
+    const: ti,omap2420-mmc
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  dmas:
+    maxItems: 2
+
+  dma-names:
+    items:
+      - const: tx
+      - const: rx
+
+  ti,hwmods:
+    $ref: /schemas/types.yaml#/definitions/string
+    description:
+      List of hwmod names (ascii strings), that comes from the OMAP
+      HW documentation, attached to a device. Must contain at least
+      one hwmod.
+    pattern: "^msdi[0-9]+$"
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - dmas
+  - dma-names
+  - ti,hwmods
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    mmc@...9c000 {
+        compatible = "ti,omap2420-mmc";
+        ti,hwmods = "msdi1";
+        reg = <0x4809c000 0x80>;
+        interrupts = <83 IRQ_TYPE_LEVEL_HIGH>;
+        dmas = <&sdma 61>, <&sdma 62>;
+        dma-names = "tx", "rx";
+    };
+...
diff --git a/Documentation/devicetree/bindings/mmc/ti-omap.txt b/Documentation/devicetree/bindings/mmc/ti-omap.txt
deleted file mode 100644
index 02fd31cf361d6ed893ec2f9eb8368b358ab2bae1..0000000000000000000000000000000000000000
--- a/Documentation/devicetree/bindings/mmc/ti-omap.txt
+++ /dev/null
@@ -1,26 +0,0 @@
-* TI MMC host controller for OMAP1 and 2420
-
-The MMC Host Controller on TI OMAP1 and 2420 family provides
-an interface for MMC, SD, and SDIO types of memory cards.
-
-This file documents differences between the core properties described
-by mmc.txt and the properties used by the omap mmc driver.
-
-Note that this driver will not work with omap2430 or later omaps,
-please see the omap hsmmc driver for the current omaps.
-
-Required properties:
-- compatible: Must be "ti,omap2420-mmc", for OMAP2420 controllers
-- ti,hwmods: For 2420, must be "msdi<n>", where n is controller
-  instance starting 1
-
-Examples:
-
-	msdi1: mmc@...9c000 {
-		compatible = "ti,omap2420-mmc";
-		ti,hwmods = "msdi1";
-		reg = <0x4809c000 0x80>;
-		interrupts = <83>;
-		dmas = <&sdma 61 &sdma 62>;
-		dma-names = "tx", "rx";
-	};

---
base-commit: 3e039dcc9c1320c0d33ddd51c372dcc91d3ea3c7
change-id: 20250502-ti-omap-12655fa9db3e

Best regards,
-- 
Charan Pedumuru <charan.pedumuru@...il.com>