[PATCH v2] dt-bindings: iio: adc: Migrate MCP3911 documentation to yaml

Marcus Folkesson
2019-11-06T11:09:50Z

Rewrite bindings to use json-schema vocabulary.

Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>
---

Notes:
v2:
- Remove descriptor for reg and spi-max-frequency (Rob)
- Write better description for clocks and vref-supply (Rob)
- Remove max-items for vref-supply

.../devicetree/bindings/iio/adc/mcp3911.txt | 30 --------
.../bindings/iio/adc/microchip,mcp3911.yaml | 71 +++++++++++++++++++
MAINTAINERS | 2 +-
3 files changed, 72 insertions(+), 31 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/iio/adc/mcp3911.txt
create mode 100644 Documentation/devicetree/bindings/iio/adc/microchip,mcp3911.yaml

diff --git a/Documentation/devicetree/bindings/iio/adc/mcp3911.txt b/Documentation/devicetree/bindings/iio/adc/mcp3911.txt
deleted file mode 100644
index 3071f48fb30b..000000000000
--- a/Documentation/devicetree/bindings/iio/adc/mcp3911.txt
+++ /dev/null
@@ -1,30 +0,0 @@
-* Microchip MCP3911 Dual channel analog front end (ADC)
-
-Required properties:
- - compatible: Should be "microchip,mcp3911"
- - reg: SPI chip select number for the device
-
-Recommended properties:
- - spi-max-frequency: Definition as per
- Documentation/devicetree/bindings/spi/spi-bus.txt.
- Max frequency for this chip is 20MHz.
-
-Optional properties:
- - clocks: Phandle and clock identifier for sampling clock
- - interrupt-parent: Phandle to the parent interrupt controller
- - interrupts: IRQ line for the ADC
- - microchip,device-addr: Device address when multiple MCP3911 chips are present on the
- same SPI bus. Valid values are 0-3. Defaults to 0.
- - vref-supply: Phandle to the external reference voltage supply.
-
-Example:
-adc@0 {
- compatible = "microchip,mcp3911";
- reg = <0>;
- interrupt-parent = <&gpio5>;
- interrupts = <15 IRQ_TYPE_EDGE_RISING>;
- spi-max-frequency = <20000000>;
- microchip,device-addr = <0>;
- vref-supply = <&vref_reg>;
- clocks = <&xtal>;
-};
diff --git a/Documentation/devicetree/bindings/iio/adc/microchip,mcp3911.yaml b/Documentation/devicetree/bindings/iio/adc/microchip,mcp3911.yaml
new file mode 100644
index 000000000000..c73a374e614a
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/microchip,mcp3911.yaml
@@ -0,0 +1,71 @@
+# SPDX-License-Identifier: GPL-2.0
+# Copyright 2019 Marcus Folkesson <marcus.folkesson@gmail.com>
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/bindings/iio/adc/microchip,mcp3911.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Microchip MCP3911 Dual channel analog front end (ADC)
+
+maintainers:
+ - Marcus Folkesson <marcus.folkesson@gmail.com>
+ - Kent Gustavsson <nedo80@gmail.com>
+
+description: |
+ Bindings for the Microchip MCP3911 Dual channel ADC device. Datasheet can be
+ found here: https://ww1.microchip.com/downloads/en/DeviceDoc/20002286C.pdf
+
+properties:
+ compatible:
+ enum:
+ - microchip,mcp3911
+
+ reg:
+ maxItems: 1
+
+ spi-max-frequency:
+ maximum: 20000000
+
+ clocks:
+ description: |
+ Phandle and clock identifier for external sampling clock.
+ If not specified, the internal crystal oscillator will be used.
+ maxItems: 1
+
+ interrupts:
+ description: IRQ line of the ADC
+ maxItems: 1
+
+ microchip,device-addr:
+ description: Device address when multiple MCP3911 chips are present on the same SPI bus.
+ allOf:
+ - $ref: /schemas/types.yaml#/definitions/uint32
+ - enum: [0, 1, 2, 3]
+ - default: 0
+
+ vref-supply:
+ description: |
+ Phandle to the external reference voltage supply.
+ If not specified, the internal voltage reference (1.2V) will be used.
+
+required:
+ - compatible
+ - reg
+
+examples:
+ - |
+ spi {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ adc@0 {
+ compatible = "microchip,mcp3911";
+ reg = <0>;
+ interrupt-parent = <&gpio5>;
+ interrupts = <15 2>;
+ spi-max-frequency = <20000000>;
+ microchip,device-addr = <0>;
+ vref-supply = <&vref_reg>;
+ clocks = <&xtal>;
+ };
+ };
diff --git a/MAINTAINERS b/MAINTAINERS
index e51a68bf8ca8..fbccc9d450ff 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -10723,7 +10723,7 @@ M: Kent Gustavsson <kent@minoris.se>
L: linux-iio@vger.kernel.org
S: Supported
F: drivers/iio/adc/mcp3911.c
-F: Documentation/devicetree/bindings/iio/adc/mcp3911.txt
+F: Documentation/devicetree/bindings/iio/adc/microchip,mcp3911.yaml

MICROCHIP NAND DRIVER
M: Tudor Ambarus <tudor.ambarus@microchip.com>
--
2.23.0