linux-kernel - [PATCH] dt-bindings: mmc: socionext,milbeaut-m10v-sdhci-3.0: convert to DT schema

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Message-Id: <20251023-milbeaut-v1-1-3e4ff67110ad@gmail.com>
Date: Thu, 23 Oct 2025 17:37:36 +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>, 
 Taichi Sugaya <sugaya.taichi@...ionext.com>, 
 Takao Orito <orito.takao@...ionext.com>
Cc: linux-mmc@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 Charan Pedumuru <charan.pedumuru@...il.com>
Subject: [PATCH] dt-bindings: mmc: socionext,milbeaut-m10v-sdhci-3.0:
 convert to DT schema

Convert SOCIONEXT Milbeaut SDHCI controller binding to YAML format.
Add a new property "voltage-ranges" to resolve dt_check errors.

Signed-off-by: Charan Pedumuru <charan.pedumuru@...il.com>
---
 .../devicetree/bindings/mmc/sdhci-milbeaut.txt     | 30 ---------
 .../mmc/socionext,milbeaut-m10v-sdhci-3.0.yaml     | 78 ++++++++++++++++++++++
 2 files changed, 78 insertions(+), 30 deletions(-)

diff --git a/Documentation/devicetree/bindings/mmc/sdhci-milbeaut.txt b/Documentation/devicetree/bindings/mmc/sdhci-milbeaut.txt
deleted file mode 100644
index 627ee89c125b..000000000000
--- a/Documentation/devicetree/bindings/mmc/sdhci-milbeaut.txt
+++ /dev/null
@@ -1,30 +0,0 @@
-* SOCIONEXT Milbeaut SDHCI controller
-
-This file documents differences between the core properties in mmc.txt
-and the properties used by the sdhci_milbeaut driver.
-
-Required properties:
-- compatible: "socionext,milbeaut-m10v-sdhci-3.0"
-- clocks: Must contain an entry for each entry in clock-names. It is a
-  list of phandles and clock-specifier pairs.
-  See ../clocks/clock-bindings.txt for details.
-- clock-names: Should contain the following two entries:
-	"iface" - clock used for sdhci interface
-	"core"  - core clock for sdhci controller
-
-Optional properties:
-- fujitsu,cmd-dat-delay-select: boolean property indicating that this host
-  requires the CMD_DAT_DELAY control to be enabled.
-
-Example:
-	sdhci3: mmc@...10000 {
-		compatible = "socionext,milbeaut-m10v-sdhci-3.0";
-		reg = <0x1b010000 0x10000>;
-		interrupts = <0 265 0x4>;
-		voltage-ranges = <3300 3300>;
-		bus-width = <4>;
-		clocks = <&clk 7>, <&ahb_clk>;
-		clock-names = "core", "iface";
-		cap-sdio-irq;
-		fujitsu,cmd-dat-delay-select;
-	};
diff --git a/Documentation/devicetree/bindings/mmc/socionext,milbeaut-m10v-sdhci-3.0.yaml b/Documentation/devicetree/bindings/mmc/socionext,milbeaut-m10v-sdhci-3.0.yaml
new file mode 100644
index 000000000000..6b67bef30347
--- /dev/null
+++ b/Documentation/devicetree/bindings/mmc/socionext,milbeaut-m10v-sdhci-3.0.yaml
@@ -0,0 +1,78 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mmc/socionext,milbeaut-m10v-sdhci-3.0.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: SOCIONEXT Milbeaut SDHCI controller
+
+maintainers:
+  - Taichi Sugaya <sugaya.taichi@...ionext.com>
+  - Takao Orito <orito.takao@...ionext.com>
+
+description:
+  The SOCIONEXT Milbeaut SDHCI controller is a specialized SD Host
+  Controller found in some of Socionext's Milbeaut image processing SoCs.
+  It features a dedicated "bridge controller." This bridge controller
+  implements special functions like reset control, clock management for
+  various SDR modes (SDR12, SDR25, SDR50) and physical pin property settings.
+
+allOf:
+  - $ref: sdhci-common.yaml#
+
+properties:
+  compatible:
+    const: socionext,milbeaut-m10v-sdhci-3.0
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 2
+
+  clock-names:
+    items:
+      - const: core
+      - const: iface
+
+  fujitsu,cmd-dat-delay-select:
+    description:
+      Its presence indicates that the controller requires a specific command
+      and data line delay selection mechanism for proper operation, particularly
+      when dealing with high-speed SD/eMMC modes.
+    type: boolean
+
+  voltage-ranges:
+    $ref: /schemas/types.yaml#/definitions/uint32-matrix
+    description:
+      Two cells are required, first cell specifies minimum slot voltage (mV),
+      second cell specifies maximum slot voltage (mV).
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    mmc@...10000 {
+        compatible = "socionext,milbeaut-m10v-sdhci-3.0";
+        reg = <0x1b010000 0x10000>;
+        interrupts = <GIC_SPI 265 IRQ_TYPE_LEVEL_HIGH>;
+        voltage-ranges = <3300 3300>;
+        bus-width = <4>;
+        clocks = <&clk 7>, <&ahb_clk>;
+        clock-names = "core", "iface";
+        cap-sdio-irq;
+        fujitsu,cmd-dat-delay-select;
+    };
+...

---
base-commit: 7bac2c97af4078d7a627500c9bcdd5b033f97718
change-id: 20250524-milbeaut-5c0267202e2c

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