[PATCH V3] dt-bindings: mmc: Convert imx esdhc to json-schema

Anson Huang
2020-06-16T03:47:11Z

Convert the i.MX ESDHC binding to DT schema format using json-schema

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
---
Changes since V2:
- fix typo of "dealy" to "delay";
- remove unused "Several ranges could be specified." in voltage-ranges which contradicts
the min/max items.
---
.../devicetree/bindings/mmc/fsl-imx-esdhc.txt | 67 -----------
.../devicetree/bindings/mmc/fsl-imx-esdhc.yaml | 124 +++++++++++++++++++++
2 files changed, 124 insertions(+), 67 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt
create mode 100644 Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml

diff --git a/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt b/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt
deleted file mode 100644
index de1b8bd..0000000
--- a/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt
+++ /dev/null
@@ -1,67 +0,0 @@
-* Freescale Enhanced Secure Digital Host Controller (eSDHC) for i.MX
-
-The Enhanced Secure Digital Host Controller on Freescale i.MX 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 sdhci-esdhc-imx driver.
-
-Required properties:
-- compatible : Should be "fsl,<chip>-esdhc", the supported chips include
- "fsl,imx25-esdhc"
- "fsl,imx35-esdhc"
- "fsl,imx51-esdhc"
- "fsl,imx53-esdhc"
- "fsl,imx6q-usdhc"
- "fsl,imx6sl-usdhc"
- "fsl,imx6sx-usdhc"
- "fsl,imx6ull-usdhc"
- "fsl,imx7d-usdhc"
- "fsl,imx7ulp-usdhc"
- "fsl,imx8mq-usdhc"
- "fsl,imx8mm-usdhc"
- "fsl,imx8mn-usdhc"
- "fsl,imx8mp-usdhc"
- "fsl,imx8qm-usdhc"
- "fsl,imx8qxp-usdhc"
-
-Optional properties:
-- fsl,wp-controller : Indicate to use controller internal write protection
-- fsl,delay-line : Specify the number of delay cells for override mode.
- This is used to set the clock delay for DLL(Delay Line) on override mode
- to select a proper data sampling window in case the clock quality is not good
- due to signal path is too long on the board. Please refer to eSDHC/uSDHC
- chapter, DLL (Delay Line) section in RM for details.
-- voltage-ranges : Specify the voltage range in case there are software
- transparent level shifters on the outputs of the controller. Two cells are
- required, first cell specifies minimum slot voltage (mV), second cell
- specifies maximum slot voltage (mV). Several ranges could be specified.
-- fsl,tuning-start-tap: Specify the start dealy cell point when send first CMD19
- in tuning procedure.
-- fsl,tuning-step: Specify the increasing delay cell steps in tuning procedure.
- The uSDHC use one delay cell as default increasing step to do tuning process.
- This property allows user to change the tuning step to more than one delay
- cells which is useful for some special boards or cards when the default
- tuning step can't find the proper delay window within limited tuning retries.
-- fsl,strobe-dll-delay-target: Specify the strobe dll control slave delay target.
- This delay target programming host controller loopback read clock, and this
- property allows user to change the delay target for the strobe input read clock.
- If not use this property, driver default set the delay target to value 7.
- Only eMMC HS400 mode need to take care of this property.
-
-Examples:
-
-esdhc@70004000 {
- compatible = "fsl,imx51-esdhc";
- reg = <0x70004000 0x4000>;
- interrupts = <1>;
- fsl,wp-controller;
-};
-
-esdhc@70008000 {
- compatible = "fsl,imx51-esdhc";
- reg = <0x70008000 0x4000>;
- interrupts = <2>;
- cd-gpios = <&gpio1 6 0>; /* GPIO1_6 */
- wp-gpios = <&gpio1 5 0>; /* GPIO1_5 */
-};
diff --git a/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml b/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml
new file mode 100644
index 0000000..75dc116
--- /dev/null
+++ b/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml
@@ -0,0 +1,124 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mmc/fsl-imx-esdhc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale Enhanced Secure Digital Host Controller (eSDHC) for i.MX
+
+maintainers:
+ - Shawn Guo <shawn.guo@linaro.org>
+
+allOf:
+ - $ref: "mmc-controller.yaml"
+
+description: |
+ The Enhanced Secure Digital Host Controller on Freescale i.MX 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 sdhci-esdhc-imx driver.
+
+properties:
+ compatible:
+ enum:
+ - fsl,imx25-esdhc
+ - fsl,imx35-esdhc
+ - fsl,imx51-esdhc
+ - fsl,imx53-esdhc
+ - fsl,imx6q-usdhc
+ - fsl,imx6sl-usdhc
+ - fsl,imx6sx-usdhc
+ - fsl,imx6ull-usdhc
+ - fsl,imx7d-usdhc
+ - fsl,imx7ulp-usdhc
+ - fsl,imx8mq-usdhc
+ - fsl,imx8mm-usdhc
+ - fsl,imx8mn-usdhc
+ - fsl,imx8mp-usdhc
+ - fsl,imx8qm-usdhc
+ - fsl,imx8qxp-usdhc
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+
+ fsl,wp-controller:
+ description: |
+ boolean, if present, indicate to use controller internal write protection.
+ type: boolean
+
+ fsl,delay-line:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: |
+ Specify the number of delay cells for override mode.
+ This is used to set the clock delay for DLL(Delay Line) on override mode
+ to select a proper data sampling window in case the clock quality is not good
+ due to signal path is too long on the board. Please refer to eSDHC/uSDHC
+ chapter, DLL (Delay Line) section in RM for details.
+ default: 0
+
+ voltage-ranges:
+ $ref: '/schemas/types.yaml#/definitions/uint32-matrix'
+ description: |
+ Specify the voltage range in case there are software transparent level
+ shifters on the outputs of the controller. Two cells are required, first
+ cell specifies minimum slot voltage (mV), second cell specifies maximum
+ slot voltage (mV).
+ items:
+ items:
+ - description: value for minimum slot voltage
+ - description: value for maximum slot voltage
+ maxItems: 1
+
+ fsl,tuning-start-tap:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: |
+ Specify the start delay cell point when send first CMD19 in tuning procedure.
+ default: 0
+
+ fsl,tuning-step:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: |
+ Specify the increasing delay cell steps in tuning procedure.
+ The uSDHC use one delay cell as default increasing step to do tuning process.
+ This property allows user to change the tuning step to more than one delay
+ cells which is useful for some special boards or cards when the default
+ tuning step can't find the proper delay window within limited tuning retries.
+ default: 0
+
+ fsl,strobe-dll-delay-target:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: |
+ Specify the strobe dll control slave delay target.
+ This delay target programming host controller loopback read clock, and this
+ property allows user to change the delay target for the strobe input read clock.
+ If not use this property, driver default set the delay target to value 7.
+ Only eMMC HS400 mode need to take care of this property.
+ default: 0
+
+required:
+ - compatible
+ - reg
+ - interrupts
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ mmc@70004000 {
+ compatible = "fsl,imx51-esdhc";
+ reg = <0x70004000 0x4000>;
+ interrupts = <1>;
+ fsl,wp-controller;
+ };
+
+ mmc@70008000 {
+ compatible = "fsl,imx51-esdhc";
+ reg = <0x70008000 0x4000>;
+ interrupts = <2>;
+ cd-gpios = <&gpio1 6 0>; /* GPIO1_6 */
+ wp-gpios = <&gpio1 5 0>; /* GPIO1_5 */
+ };
--
2.7.4

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