Convert the i.MX I2C binding to DT schema format using json-schema,
some improvements applied, such as update example based on latest DT
file, add more compatible for existing SoCs, and remove unnecessary
common property "pinctrl".
Signed-off-by: Anson Huang
---
Changes since V2:
- remove 'clock-frequency' property's type and use enum for it, ONLY
support 100KHz/400KHz.
- remove *-gpios's typs/description, since it is already defined in
i2c-gpio.yaml.
- fix space issue in example.
---
Documentation/devicetree/bindings/i2c/i2c-imx.txt | 49 --
Documentation/devicetree/bindings/i2c/i2c-imx.yaml | 103 +
2 files changed, 103 insertions(+), 49 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/i2c/i2c-imx.txt
create mode 100644 Documentation/devicetree/bindings/i2c/i2c-imx.yaml
diff --git a/Documentation/devicetree/bindings/i2c/i2c-imx.txt
b/Documentation/devicetree/bindings/i2c/i2c-imx.txt
deleted file mode 100644
index b967544..000
--- a/Documentation/devicetree/bindings/i2c/i2c-imx.txt
+++ /dev/null
@@ -1,49 +0,0 @@
-* Freescale Inter IC (I2C) and High Speed Inter IC (HS-I2C) for i.MX
-
-Required properties:
-- compatible :
- - "fsl,imx1-i2c" for I2C compatible with the one integrated on i.MX1 SoC
- - "fsl,imx21-i2c" for I2C compatible with the one integrated on i.MX21 SoC
- - "fsl,vf610-i2c" for I2C compatible with the one integrated on Vybrid vf610
SoC
-- reg : Should contain I2C/HS-I2C registers location and length
-- interrupts : Should contain I2C/HS-I2C interrupt
-- clocks : Should contain the I2C/HS-I2C clock specifier
-
-Optional properties:
-- clock-frequency : Constains desired I2C/HS-I2C bus clock frequency in Hz.
- The absence of the property indicates the default frequency 100 kHz.
-- dmas: A list of two dma specifiers, one for each entry in dma-names.
-- dma-names: should contain "tx" and "rx".
-- scl-gpios: specify the gpio related to SCL pin
-- sda-gpios: specify the gpio related to SDA pin
-- pinctrl: add extra pinctrl to configure i2c pins to gpio function for i2c
- bus recovery, call it "gpio" state
-
-Examples:
-
-i2c@83fc4000 { /* I2C2 on i.MX51 */
- compatible = "fsl,imx51-i2c", "fsl,imx21-i2c";
- reg = <0x83fc4000 0x4000>;
- interrupts = <63>;
-};
-
-i2c@70038000 { /* HS-I2C on i.MX51 */
- compatible = "fsl,imx51-i2c", "fsl,imx21-i2c";
- reg = <0x70038000 0x4000>;
- interrupts = <64>;
- clock-frequency = <40>;
-};
-
-i2c0: i2c@40066000 { /* i2c0 on vf610 */
- compatible = "fsl,vf610-i2c";
- reg = <0x40066000 0x1000>;
- interrupts =<0 71 0x04>;
- dmas = < 0 50>,
- < 0 51>;
- dma-names = "rx","tx";
- pinctrl-names = "default", "gpio";
- pinctrl-0 = <_i2c1>;
- pinctrl-1 = <_i2c1_gpio>;
- scl-gpios = < 26 GPIO_ACTIVE_HIGH>;
- sda-gpios = < 27 GPIO_ACTIVE_HIGH>;
-};
diff --git a/Documentation/devicetree/bindings/i2c/i2c-imx.yaml
b/Documentation/devicetree/bindings/i2c/i2c-imx.yaml
new file mode 100644
index 000..869f2ae
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/i2c-imx.yaml
@@ -0,0 +1,103 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/i2c-imx.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale Inter IC (I2C) and High Speed Inter IC (HS-I2C) for i.MX
+
+maintainers:
+ - Wolfram Sang
+
+properties:
+ compatible:
+oneOf:
+ - const: fsl,imx1-i2c
+ - const: fsl,imx21-i2c
+ - const: fsl,vf610-i2c
+ - items:
+ - const: fsl,imx35-i2c
+ - const: fsl,imx1-i2c
+ - items:
+ - enum:
+- fsl,imx25-i2c
+- fsl,imx27-i2c
+- fsl,imx31-i2c
+- fsl,imx50-i2c
+- fsl,imx51-i2c
+- fsl,imx53-i2c
+- fsl,imx6q-i2c
+- fsl,imx6sl-i2c
+- fsl,imx6sx-i2c
+- fsl,imx6sll-i2c
+- fsl,imx6ul-i2c
+- fsl,imx7s-i2c
+- fsl,imx8mq-i2c
+- fsl,imx8mm-i2c
+- fsl,imx8mn-i2c
+- fsl,imx8mp-i2c
+ - const: fsl,imx21-i2c
+
+ reg:
+maxItems: 1
+
+ interrupts:
+maxItems: 1
+
+ clocks:
+maxItems: 1
+
+ clock-names:
+const: ipg
+
+ clock-frequency:
+enum: [ 10, 40 ]
+
+ dmas:
+items:
+ - description: DMA controller phandle and request line for RX
+ - description: DMA controller phandle and request line for TX
+
+ dma-names:
+items:
+ - const: rx
+ - const: tx
+
+ sda-gpios:
+maxItems: 1
+
+ scl-gpios:
+maxItems: 1
+
+required:
+ - compatible
+ - reg
+ - interrupts
+ - clocks
+
+additionalProperties: false
+
+examples:
+ - |
+#include
+#include
+#include
+#include
+
+i2c@83fc4000 {
+compatible = "fsl,imx51-i2c", "fsl,imx21-i2c";
+reg = <0x83fc4000
