dt-bindings: i2c: Convert i2c-gpio binding to json-schema

Convert the i2c-gpio binding to DT schema format using json-schema. This
serves as an example of how to include other schema (i2c-controller.yaml
in this case).

Signed-off-by: Rob Herring <robh@kernel.org>

diff --git a/Documentation/devicetree/bindings/i2c/i2c-gpio.txt b/Documentation/devicetree/bindings/i2c/i2c-gpio.txt
deleted file mode 100644 (file)
index 38a0556..0000000
--- a/Documentation/devicetree/bindings/i2c/i2c-gpio.txt
+++ /dev/null
@@ -1,46 +0,0 @@
-Device-Tree bindings for i2c gpio driver
-
-Required properties:
-       - compatible = "i2c-gpio";
-       - sda-gpios: 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.
-       - scl-gpios: 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.
-
-Optional properties:
-       - i2c-gpio,scl-output-only: scl as output only
-       - i2c-gpio,delay-us: delay between GPIO operations (may depend on each platform)
-       - i2c-gpio,timeout-ms: timeout to get data
-
-Deprecated properties, do not use in new device tree sources:
-       - gpios: sda and scl gpio, alternative for {sda,scl}-gpios
-       - i2c-gpio,sda-open-drain: this means that something outside of our
-         control has put the GPIO line used for SDA into open drain mode, and
-         that something is not the GPIO chip. It is essentially an
-         inconsistency flag.
-       - i2c-gpio,scl-open-drain: this means that something outside of our
-         control has put the GPIO line used for SCL into open drain mode, and
-         that something is not the GPIO chip. It is essentially an
-         inconsistency flag.
-
-Example nodes:
-
-#include <dt-bindings/gpio/gpio.h>
-
-i2c@0 {
-       compatible = "i2c-gpio";
-       sda-gpios = <&pioA 23 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>;
-       scl-gpios = <&pioA 24 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>;
-       i2c-gpio,delay-us = <2>;        /* ~100 kHz */
-       #address-cells = <1>;
-       #size-cells = <0>;
-
-       rv3029c2@56 {
-               compatible = "rv3029c2";
-               reg = <0x56>;
-       };
-};

diff --git a/Documentation/devicetree/bindings/i2c/i2c-gpio.yaml b/Documentation/devicetree/bindings/i2c/i2c-gpio.yaml
new file mode 100644 (file)
index 0000000..da61290
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/i2c-gpio.yaml
@@ -0,0 +1,73 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/i2c-gpio.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Bindings for GPIO bitbanged I2C
+
+maintainers:
+  - Wolfram Sang <wolfram@the-dreams.de>
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+
+properties:
+  compatible:
+    items:
+      - const: i2c-gpio
+
+  sda-gpios:
+    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:
+    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
+
+  i2c-gpio,scl-output-only:
+    description: scl as output only
+    type: boolean
+
+  i2c-gpio,delay-us:
+    description: delay between GPIO operations (may depend on each platform)
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  i2c-gpio,timeout-ms:
+    description: timeout to get data
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  # Deprecated properties, do not use in new device tree sources:
+  gpios:
+    minItems: 2
+    maxItems: 2
+    description: sda and scl gpio, alternative for {sda,scl}-gpios
+
+  i2c-gpio,sda-open-drain:
+    # Generate a warning if present
+    not: true
+    description: this means that something outside of our control has put
+      the GPIO line used for SDA into open drain mode, and that something is
+      not the GPIO chip. It is essentially an inconsistency flag.
+
+  i2c-gpio,scl-open-drain:
+    # Generate a warning if present
+    not: true
+    description: this means that something outside of our control has put the
+      GPIO line used for SCL into open drain mode, and that something is not
+      the GPIO chip. It is essentially an inconsistency flag.
+
+required:
+  - compatible
+  - sda-gpios
+  - scl-gpios
+
+...