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Date: Tue, 5 Nov 2019 21:49:20 -0600
From: Rob Herring <robh@...nel.org>
To: Marcus Folkesson <marcus.folkesson@...il.com>
Cc: Jonathan Cameron <jic23@...nel.org>,
Hartmut Knaack <knaack.h@....de>,
Lars-Peter Clausen <lars@...afoo.de>,
Peter Meerwald-Stadler <pmeerw@...erw.net>,
Mark Rutland <mark.rutland@....com>,
Kent Gustavsson <kent@...oris.se>,
Mauro Carvalho Chehab <mchehab+samsung@...nel.org>,
"David S . Miller" <davem@...emloft.net>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
"Paul E . McKenney" <paulmck@...ux.ibm.com>,
linux-iio@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH] dt-bindings: iio: adc: Migrate MCP3911 documentation to
yaml
On Tue, Oct 29, 2019 at 10:11:42PM +0100, Marcus Folkesson wrote:
> Rewrite bindings to use json-schema vocabulary.
>
> Signed-off-by: Marcus Folkesson <marcus.folkesson@...il.com>
> ---
> .../devicetree/bindings/iio/adc/mcp3911.txt | 30 --------
> .../bindings/iio/adc/microchip,mcp3911.yaml | 72 +++++++++++++++++++
> MAINTAINERS | 2 +-
> 3 files changed, 73 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..bfcf6a5fb44e
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/iio/adc/microchip,mcp3911.yaml
> @@ -0,0 +1,72 @@
> +# SPDX-License-Identifier: GPL-2.0
> +# Copyright 2019 Marcus Folkesson <marcus.folkesson@...il.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@...il.com>
> + - Kent Gustavsson <nedo80@...il.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:
> + description: SPI chip select number for the device
No need to describe common properties if you have nothing special for
this device to say.
> + maxItems: 1
> +
> + spi-max-frequency:
> + description: |
> + Definition as per Documentation/devicetree/bindings/spi/spi-bus.txt.
Same here.
> + maximum: 20000000
> + maxItems: 1
Not an array, so drop.
> +
> + clocks:
> + description: Phandle and clock identifier for sampling clock
Same comment on descriptions.
> + 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.
> + maxItems: 1
Drop this *-supply is always 1 item.
> +
> +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@...oris.se>
> L: linux-iio@...r.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@...rochip.com>
> --
> 2.23.0
>
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