dt-bindings: mmc: ti,omap2430-sdhci: convert to DT schema

Convert TI OMAP SDHCI Controller binding to YAML format.
Changes during Conversion:
- Define new properties like "clocks", "clock-names",
"pbias-supply" and "power-domains" to resolve dtb_check errors.
- Remove "pinctrl-names" and "pinctrl-<n>"
from required as they are not necessary for all DTS files.
- Remove "ti,hwmods" property entirely from the YAML as the
DTS doesn't contain this property for the given compatibles and the
text binding is misleading.
- Add "clocks", "clock-names" and "max-frequency" to the required
properties based on the compatible and the text binding doesn't mention
these properties as required.
- Add missing strings like "default-rev11", "sdr12-rev11", "sdr25-rev11",
"hs-rev11", "sdr25-rev11" and "sleep" to pinctrl-names string array
to resolve errors detected by dtb_check.

Signed-off-by: Charan Pedumuru <[e-mail]>
Reviewed-by: Rob Herring (Arm) <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Kevin Hilman <[e-mail]>

Documentation/devicetree/bindings/mmc/sdhci-omap.txt

···
-* TI OMAP SDHCI Controller
-
-Refer to mmc.txt for standard MMC bindings.
-
-For UHS devices which require tuning, the device tree should have a "cpu_thermal" node which maps to the appropriate thermal zone. This is used to get the temperature of the zone during tuning.
-
-Required properties:
-- compatible: Should be "ti,omap2430-sdhci" for omap2430 controllers
-	      Should be "ti,omap3-sdhci" for omap3 controllers
-	      Should be "ti,omap4-sdhci" for omap4 and ti81 controllers
-	      Should be "ti,omap5-sdhci" for omap5 controllers
-	      Should be "ti,dra7-sdhci" for DRA7 and DRA72 controllers
-	      Should be "ti,k2g-sdhci" for K2G
-	      Should be "ti,am335-sdhci" for am335x controllers
-	      Should be "ti,am437-sdhci" for am437x controllers
-- ti,hwmods: Must be "mmc<n>", <n> is controller instance starting 1
-	     (Not required for K2G).
-- pinctrl-names: Should be subset of "default", "hs", "sdr12", "sdr25", "sdr50",
-		 "ddr50-rev11", "sdr104-rev11", "ddr50", "sdr104",
-		 "ddr_1_8v-rev11", "ddr_1_8v" or "ddr_3_3v", "hs200_1_8v-rev11",
-		 "hs200_1_8v",
-- pinctrl-<n> : Pinctrl states as described in bindings/pinctrl/pinctrl-bindings.txt
-
-Optional properties:
-- dmas:		List of DMA specifiers with the controller specific format as described
-		in the generic DMA client binding. A tx and rx specifier is required.
-- dma-names:	List of DMA request names. These strings correspond 1:1 with the
-		DMA specifiers listed in dmas. The string naming is to be "tx"
-		and "rx" for TX and RX DMA requests, respectively.
-
-Deprecated properties:
-- ti,non-removable: Compatible with the generic non-removable property
-
-Example:
-	mmc1: mmc@4809c000 {
-		compatible = "ti,dra7-sdhci";
-		reg = <0x4809c000 0x400>;
-		ti,hwmods = "mmc1";
-		bus-width = <4>;
-		vmmc-supply = <&vmmc>; /* phandle to regulator node */
-		dmas = <&sdma 61 &sdma 62>;
-		dma-names = "tx", "rx";
-	};

Documentation/devicetree/bindings/mmc/ti,omap2430-sdhci.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mmc/ti,omap2430-sdhci.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: TI OMAP SDHCI Controller
+
+maintainers:
+  - Kishon Vijay Abraham I <[e-mail]>
+
+description:
+  For UHS devices which require tuning, the device tree should have a
+  cpu_thermal node which maps to the appropriate thermal zone. This
+  is used to get the temperature of the zone during tuning.
+
+properties:
+  compatible:
+    enum:
+      - ti,omap2430-sdhci
+      - ti,omap3-sdhci
+      - ti,omap4-sdhci
+      - ti,omap5-sdhci
+      - ti,dra7-sdhci
+      - ti,k2g-sdhci
+      - ti,am335-sdhci
+      - ti,am437-sdhci
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 2
+
+  clock-names:
+    items:
+      - const: fck
+      - const: mmchsdb_fck
+
+  dmas:
+    maxItems: 2
+
+  dma-names:
+    items:
+      - const: tx
+      - const: rx
+
+  pinctrl-names:
+    minItems: 1
+    maxItems: 14
+    items:
+      enum:
+        - default
+        - default-rev11
+        - hs
+        - sdr12
+        - sdr12-rev11
+        - sdr25
+        - sdr25-rev11
+        - sdr50
+        - ddr50-rev11
+        - sdr104-rev11
+        - ddr50
+        - sdr104
+        - ddr_1_8v-rev11
+        - ddr_1_8v
+        - ddr_3_3v
+        - hs-rev11
+        - hs200_1_8v-rev11
+        - hs200_1_8v
+        - sleep
+
+  pinctrl-0:
+    maxItems: 1
+
+  pinctrl-1:
+    maxItems: 1
+
+  pinctrl-2:
+    maxItems: 1
+
+  pinctrl-3:
+    maxItems: 1
+
+  pinctrl-4:
+    maxItems: 1
+
+  pinctrl-5:
+    maxItems: 1
+
+  pinctrl-6:
+    maxItems: 1
+
+  pinctrl-7:
+    maxItems: 1
+
+  pinctrl-8:
+    maxItems: 1
+
+  power-domains:
+    maxItems: 1
+
+  pbias-supply:
+    description:
+      It is used to specify the voltage regulator that provides the bias
+      voltage for certain analog or I/O pads.
+
+  ti,non-removable:
+    description:
+      It indicates that a component is not meant to be easily removed or
+      replaced by the user, such as an embedded battery or a non-removable
+      storage slot like eMMC.
+    type: boolean
+    deprecated: true
+
+  clock-frequency:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      It represents the speed at which a clock signal associated with a device
+      or bus operates, measured in Hertz (Hz). This value is crucial for configuring
+      hardware components that require a specific clock speed.
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+allOf:
+  - $ref: sdhci-common.yaml#
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - ti,dra7-sdhci
+              - ti,k2g-sdhci
+    then:
+      required:
+        - max-frequency
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: ti,k2g-sdhci
+    then:
+      required:
+        - clocks
+        - clock-names
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    mmc@4809c000 {
+        compatible = "ti,dra7-sdhci";
+        reg = <0x4809c000 0x400>;
+        interrupts = <GIC_SPI 64 IRQ_TYPE_LEVEL_HIGH>;
+        max-frequency = <192000000>;
+        sdhci-caps-mask = <0x0 0x400000>;
+        bus-width = <4>;
+        vmmc-supply = <&vmmc>; /* phandle to regulator node */
+        dmas = <&sdma 61>, <&sdma 62>;
+        dma-names = "tx", "rx";
+    };
+...