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Message-Id: <1591149535-342-4-git-send-email-Anson.Huang@nxp.com>
Date: Wed, 3 Jun 2020 09:58:55 +0800
From: Anson Huang <Anson.Huang@....com>
To: aisheng.dong@....com, robh+dt@...nel.org, shawnguo@...nel.org,
s.hauer@...gutronix.de, kernel@...gutronix.de, festevam@...il.com,
linux@...pel-privat.de, pandy.gao@....com, wolfram@...-dreams.de,
linux-i2c@...r.kernel.org, devicetree@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc: Linux-imx@....com
Subject: [PATCH 3/3] dt-bindings: i2c: Convert imx i2c to json-schema
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 <Anson.Huang@....com>
---
Documentation/devicetree/bindings/i2c/i2c-imx.txt | 49 ---------
Documentation/devicetree/bindings/i2c/i2c-imx.yaml | 118 +++++++++++++++++++++
2 files changed, 118 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..0000000
--- 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@...c4000 { /* I2C2 on i.MX51 */
- compatible = "fsl,imx51-i2c", "fsl,imx21-i2c";
- reg = <0x83fc4000 0x4000>;
- interrupts = <63>;
-};
-
-i2c@...38000 { /* HS-I2C on i.MX51 */
- compatible = "fsl,imx51-i2c", "fsl,imx21-i2c";
- reg = <0x70038000 0x4000>;
- interrupts = <64>;
- clock-frequency = <400000>;
-};
-
-i2c0: i2c@...66000 { /* i2c0 on vf610 */
- compatible = "fsl,vf610-i2c";
- reg = <0x40066000 0x1000>;
- interrupts =<0 71 0x04>;
- dmas = <&edma0 0 50>,
- <&edma0 0 51>;
- dma-names = "rx","tx";
- pinctrl-names = "default", "gpio";
- pinctrl-0 = <&pinctrl_i2c1>;
- pinctrl-1 = <&pinctrl_i2c1_gpio>;
- scl-gpios = <&gpio5 26 GPIO_ACTIVE_HIGH>;
- sda-gpios = <&gpio5 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 0000000..0d31d1c
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/i2c-imx.yaml
@@ -0,0 +1,118 @@
+# 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 <wolfram@...-dreams.de>
+
+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-frequency:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: |
+ Constains desired I2C/HS-I2C bus clock frequency in Hz.
+ The absence of the property indicates the default frequency 100 kHz.
+ default: 100000
+
+ 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:
+ $ref: '/schemas/types.yaml#/definitions/phandle'
+ description: |
+ gpio used for the sda signal, this should be flagged as
+ active high using open drain with (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)
+ from <dt-bindings/gpio/gpio.h> since the signal is by definition
+ open drain.
+ maxItems: 1
+
+ scl-gpios:
+ $ref: '/schemas/types.yaml#/definitions/phandle'
+ description: |
+ gpio used for the scl signal, this should be flagged as
+ active high using open drain with (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)
+ from <dt-bindings/gpio/gpio.h> since the signal is by definition
+ open drain.
+ maxItems: 1
+
+required:
+ - compatible
+ - reg
+ - interrupts
+ - clocks
+
+examples:
+ - |
+ #include <dt-bindings/clock/imx5-clock.h>
+ #include <dt-bindings/clock/vf610-clock.h>
+ #include <dt-bindings/gpio/gpio.h>
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+ i2c@...c4000 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "fsl,imx51-i2c", "fsl,imx21-i2c";
+ reg = <0x83fc4000 0x4000>;
+ interrupts = <63>;
+ clocks = <&clks IMX5_CLK_I2C2_GATE>;
+ };
+
+ i2c@...66000 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "fsl,vf610-i2c";
+ reg = <0x40066000 0x1000>;
+ interrupts = <71 IRQ_TYPE_LEVEL_HIGH>;
+ clocks = <&clks VF610_CLK_I2C0>;
+ clock-names = "ipg";
+ dmas = <&edma0 0 50>,
+ <&edma0 0 51>;
+ dma-names = "rx","tx";
+ };
--
2.7.4
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