dt-bindings: mmc: convert rockchip dw-mshc bindings to yaml

Current dts files with 'dwmmc' nodes are manually verified.
In order to automate this process rockchip-dw-mshc.txt
has to be converted to yaml. In the new setup
rockchip-dw-mshc.yaml will inherit properties from
mmc-controller.yaml and synopsys-dw-mshc-common.yaml.
'dwmmc' will no longer be a valid name for a node and
should be changed to 'mmc'.

Signed-off-by: Johan Jonker <[email protected]>
Reviewed-by: Rob Herring <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Ulf Hansson <[email protected]>

Author: Johan Jonker

Documentation/devicetree/bindings/mmc/rockchip-dw-mshc.txt

@@ -0,0 +1,123 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mmc/rockchip-dw-mshc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Rockchip designware mobile storage host controller device tree bindings
+
+description:
+  Rockchip uses the Synopsys designware mobile storage host controller
+  to interface a SoC with storage medium such as eMMC or SD/MMC cards.
+  This file documents the combined properties for the core Synopsys dw mshc
+  controller that are not already included in the synopsys-dw-mshc-common.yaml
+  file and the Rockchip specific extensions.
+
+allOf:
+  - $ref: "synopsys-dw-mshc-common.yaml#"
+
+maintainers:
+  - Heiko Stuebner <[email protected]>
+
+# Everything else is described in the common file
+properties:
+  compatible:
+    oneOf:
+      # for Rockchip RK2928 and before RK3288
+      - const: rockchip,rk2928-dw-mshc
+      # for Rockchip RK3288
+      - const: rockchip,rk3288-dw-mshc
+      - items:
+          - enum:
+            # for Rockchip PX30
+            - rockchip,px30-dw-mshc
+            # for Rockchip RK3036
+            - rockchip,rk3036-dw-mshc
+            # for Rockchip RK322x
+            - rockchip,rk3228-dw-mshc
+            # for Rockchip RK3328
+            - rockchip,rk3328-dw-mshc
+            # for Rockchip RK3368
+            - rockchip,rk3368-dw-mshc
+            # for Rockchip RK3399
+            - rockchip,rk3399-dw-mshc
+            # for Rockchip RV1108
+            - rockchip,rv1108-dw-mshc
+          - const: rockchip,rk3288-dw-mshc
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    minItems: 2
+    maxItems: 4
+    description:
+      Handle to "biu" and "ciu" clocks for the bus interface unit clock and
+      the card interface unit clock. If "ciu-drive" and "ciu-sample" are
+      specified in clock-names, it should also contain
+      handles to these clocks.
+
+  clock-names:
+    minItems: 2
+    items:
+      - const: biu
+      - const: ciu
+      - const: ciu-drive
+      - const: ciu-sample
+    description:
+      Apart from the clock-names "biu" and "ciu" two more clocks
+      "ciu-drive" and "ciu-sample" are supported. They are used
+      to control the clock phases, "ciu-sample" is required for tuning
+      high speed modes.
+
+  rockchip,default-sample-phase:
+    allOf:
+      - $ref: /schemas/types.yaml#/definitions/uint32
+    minimum: 0
+    maximum: 360
+    default: 0
+    description:
+      The default phase to set "ciu-sample" at probing,
+      low speeds or in case where all phases work at tuning time.
+      If not specified 0 deg will be used.
+
+  rockchip,desired-num-phases:
+    allOf:
+      - $ref: /schemas/types.yaml#/definitions/uint32
+    minimum: 0
+    maximum: 360
+    default: 360
+    description:
+      The desired number of times that the host execute tuning when needed.
+      If not specified, the host will do tuning for 360 times,
+      namely tuning for each degree.
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+
+examples:
+  - |
+    #include <dt-bindings/clock/rk3288-cru.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+    sdmmc: mmc@ff0c0000 {
+      compatible = "rockchip,rk3288-dw-mshc";
+      reg = <0x0 0xff0c0000 0x0 0x4000>;
+      interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>;
+      clocks = <&cru HCLK_SDMMC>, <&cru SCLK_SDMMC>,
+               <&cru SCLK_SDMMC_DRV>, <&cru SCLK_SDMMC_SAMPLE>;
+      clock-names = "biu", "ciu", "ciu-drive", "ciu-sample";
+      resets = <&cru SRST_MMC0>;
+      reset-names = "reset";
+      fifo-depth = <0x100>;
+      max-frequency = <150000000>;
+    };
+
+...

Documentation/devicetree/bindings/mmc/rockchip-dw-mshc.yaml

@@ -2240,6 +2240,7 @@ L:	[email protected]
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip.git
 S:	Maintained
 F:	Documentation/devicetree/bindings/i2c/i2c-rk3x.txt
+F:	Documentation/devicetree/bindings/mmc/rockchip-dw-mshc.yaml
 F:	arch/arm/boot/dts/rk3*
 F:	arch/arm/boot/dts/rv1108*
 F:	arch/arm/mach-rockchip/