dt-bindings: mmc: sdhci-am654: Convert sdhci-am654 controller documentation to json schema

Convert sdhci-am654 documentation to yaml format. The new file
sdhci-am654.yaml will inherit from mmc-controller.yaml.
Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
Link: https://lore.kernel.org/r/20200923105206.7988-2-faiz_abbas@ti.comSigned-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Documentation/devicetree/bindings/mmc/sdhci-am654.txt

-Device Tree Bindings for the SDHCI Controllers present on TI's AM654 SOCs
-
-The bindings follow the mmc[1], clock[2] and interrupt[3] bindings.
-Only deviations are documented here.
-
-  [1] Documentation/devicetree/bindings/mmc/mmc.txt
-  [2] Documentation/devicetree/bindings/clock/clock-bindings.txt
-  [3] Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
-
-Required Properties:
-	- compatible: should be one of:
-			"ti,am654-sdhci-5.1": SDHCI on AM654 device.
-			"ti,j721e-sdhci-8bit": 8 bit SDHCI on J721E device.
-			"ti,j721e-sdhci-4bit": 4 bit SDHCI on J721E device.
-			"ti,j7200-sdhci-8bit": 8 bit SDHCI on J7200 device.
-			"ti,j7200-sdhci-4bit": 4 bit SDHCI on J7200 device.
-	- reg: Must be two entries.
-		- The first should be the sdhci register space
-		- The second should the subsystem/phy register space
-	- clocks: Handles to the clock inputs.
-	- clock-names: Tuple including "clk_xin" and "clk_ahb"
-	- interrupts: Interrupt specifiers
-	Output tap delay for each speed mode:
-	- ti,otap-del-sel-legacy
-	- ti,otap-del-sel-mmc-hs
-	- ti,otap-del-sel-sd-hs
-	- ti,otap-del-sel-sdr12
-	- ti,otap-del-sel-sdr25
-	- ti,otap-del-sel-sdr50
-	- ti,otap-del-sel-sdr104
-	- ti,otap-del-sel-ddr50
-	- ti,otap-del-sel-ddr52
-	- ti,otap-del-sel-hs200
-	- ti,otap-del-sel-hs400
-	  These bindings must be provided otherwise the driver will disable the
-	  corresponding speed mode (i.e. all nodes must provide at least -legacy)
-
-Optional Properties (Required for ti,am654-sdhci-5.1,
-				  ti,j721e-sdhci-8bit,
-				  ti,j7200-sdhci-8bit):
-	- ti,trm-icp: DLL trim select
-	- ti,driver-strength-ohm: driver strength in ohms.
-				  Valid values are 33, 40, 50, 66 and 100 ohms.
-Optional Properties:
-	- ti,strobe-sel: strobe select delay for HS400 speed mode. Default value: 0x0.
-	- ti,clkbuf-sel: Clock Delay Buffer Select
-
-Example:
-
-	sdhci0: sdhci@4f80000 {
-		compatible = "ti,am654-sdhci-5.1";
-		reg = <0x0 0x4f80000 0x0 0x260>, <0x0 0x4f90000 0x0 0x134>;
-		power-domains = <&k3_pds 47>;
-		clocks = <&k3_clks 47 0>, <&k3_clks 47 1>;
-		clock-names = "clk_ahb", "clk_xin";
-		interrupts = <GIC_SPI 136 IRQ_TYPE_LEVEL_HIGH>;
-		sdhci-caps-mask = <0x80000007 0x0>;
-		mmc-ddr-1_8v;
-		ti,otap-del-sel-legacy = <0x0>;
-		ti,otap-del-sel-mmc-hs = <0x0>;
-		ti,otap-del-sel-ddr52 = <0x5>;
-		ti,otap-del-sel-hs200 = <0x5>;
-		ti,otap-del-sel-hs400 = <0x0>;
-		ti,trm-icp = <0x8>;
-	};

Documentation/devicetree/bindings/mmc/sdhci-am654.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com/
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/mmc/sdhci-am654.yaml#"
+$schema : "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: TI AM654 MMC Controller
+
+maintainers:
+  - Ulf Hansson <ulf.hansson@linaro.org>
+
+allOf:
+  - $ref: mmc-controller.yaml#
+
+properties:
+  compatible:
+    enum:
+      - ti,am654-sdhci-5.1
+      - ti,j721e-sdhci-8bit
+      - ti,j721e-sdhci-4bit
+      - ti,j7200-sdhci-8bit
+      - ti,j721e-sdhci-4bit
+
+  reg:
+    maxItems: 2
+
+  interrupts:
+    maxItems: 1
+
+  power-domains:
+    maxItems: 1
+
+  clocks:
+    minItems: 1
+    maxItems: 2
+    description: Handles to input clocks
+
+  clock-names:
+    minItems: 1
+    maxItems: 2
+    items:
+      - const: clk_ahb
+      - const: clk_xin
+
+  # PHY output tap delays:
+  # Used to delay the data valid window and align it to the sampling clock.
+  # Binding needs to be provided for each supported speed mode otherwise the
+  # corresponding mode will be disabled.
+
+  ti,otap-del-sel-legacy:
+    description: Output tap delay for SD/MMC legacy timing
+    $ref: "/schemas/types.yaml#/definitions/uint32"
+    minimum: 0
+    maximum: 0xf
+
+  ti,otap-del-sel-mmc-hs:
+    description: Output tap delay for MMC high speed timing
+    $ref: "/schemas/types.yaml#/definitions/uint32"
+    minimum: 0
+    maximum: 0xf
+
+  ti,otap-del-sel-sd-hs:
+    description: Output tap delay for SD high speed timing
+    $ref: "/schemas/types.yaml#/definitions/uint32"
+    minimum: 0
+    maximum: 0xf
+
+  ti,otap-del-sel-sdr12:
+    description: Output tap delay for SD UHS SDR12 timing
+    $ref: "/schemas/types.yaml#/definitions/uint32"
+    minimum: 0
+    maximum: 0xf
+
+  ti,otap-del-sel-sdr25:
+    description: Output tap delay for SD UHS SDR25 timing
+    $ref: "/schemas/types.yaml#/definitions/uint32"
+    minimum: 0
+    maximum: 0xf
+
+  ti,otap-del-sel-sdr50:
+    description: Output tap delay for SD UHS SDR50 timing
+    $ref: "/schemas/types.yaml#/definitions/uint32"
+    minimum: 0
+    maximum: 0xf
+
+  ti,otap-del-sel-sdr104:
+    description: Output tap delay for SD UHS SDR104 timing
+    $ref: "/schemas/types.yaml#/definitions/uint32"
+    minimum: 0
+    maximum: 0xf
+
+  ti,otap-del-sel-ddr50:
+    description: Output tap delay for SD UHS DDR50 timing
+    $ref: "/schemas/types.yaml#/definitions/uint32"
+    minimum: 0
+    maximum: 0xf
+
+  ti,otap-del-sel-ddr52:
+    description: Output tap delay for eMMC DDR52 timing
+    $ref: "/schemas/types.yaml#/definitions/uint32"
+    minimum: 0
+    maximum: 0xf
+
+  ti,otap-del-sel-hs200:
+    description: Output tap delay for eMMC HS200 timing
+    $ref: "/schemas/types.yaml#/definitions/uint32"
+    minimum: 0
+    maximum: 0xf
+
+  ti,otap-del-sel-hs400:
+    description: Output tap delay for eMMC HS400 timing
+    $ref: "/schemas/types.yaml#/definitions/uint32"
+    minimum: 0
+    maximum: 0xf
+
+  ti,trm-icp:
+    description: DLL trim select
+    $ref: "/schemas/types.yaml#/definitions/uint32"
+    minimum: 0
+    maximum: 0xf
+
+  ti,driver-strength-ohm:
+    description: DLL drive strength in ohms
+    $ref: "/schemas/types.yaml#/definitions/uint32"
+    oneOf:
+      - enum:
+        - 33
+        - 40
+        - 50
+        - 66
+        - 100
+
+  ti,strobe-sel:
+    description: strobe select delay for HS400 speed mode.
+    $ref: "/schemas/types.yaml#/definitions/uint32"
+
+  ti,clkbuf-sel:
+    description: Clock Delay Buffer Select
+    $ref: "/schemas/types.yaml#/definitions/uint32"
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+  - ti,otap-del-sel-legacy
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    bus {
+        #address-cells = <2>;
+        #size-cells = <2>;
+
+        mmc0: mmc@4f80000 {
+            compatible = "ti,am654-sdhci-5.1";
+            reg = <0x0 0x4f80000 0x0 0x260>, <0x0 0x4f90000 0x0 0x134>;
+            power-domains = <&k3_pds 47>;
+            clocks = <&k3_clks 47 0>, <&k3_clks 47 1>;
+            clock-names = "clk_ahb", "clk_xin";
+            interrupts = <GIC_SPI 136 IRQ_TYPE_LEVEL_HIGH>;
+            sdhci-caps-mask = <0x80000007 0x0>;
+            mmc-ddr-1_8v;
+            ti,otap-del-sel-legacy = <0x0>;
+            ti,otap-del-sel-mmc-hs = <0x0>;
+            ti,otap-del-sel-ddr52 = <0x5>;
+            ti,otap-del-sel-hs200 = <0x5>;
+            ti,otap-del-sel-hs400 = <0x0>;
+            ti,trm-icp = <0x8>;
+        };
+    };