linux-kernel - Re: [PATCH 1/2] dt-bindings: iio: adc: Add microchip MCP3561/2/4R devices

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Message-ID: <20230523-panning-surplus-b9072e18905b@spud>
Date:   Tue, 23 May 2023 17:00:04 +0100
From:   Conor Dooley <conor@...nel.org>
To:     Mike Looijmans <mike.looijmans@...ic.nl>
Cc:     devicetree@...r.kernel.org, linux-iio@...r.kernel.org,
        Conor Dooley <conor+dt@...nel.org>,
        Jonathan Cameron <jic23@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Marcus Folkesson <marcus.folkesson@...il.com>,
        Puranjay Mohan <puranjay12@...il.com>,
        Rob Herring <robh+dt@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] dt-bindings: iio: adc: Add microchip MCP3561/2/4R
 devices

On Tue, May 23, 2023 at 02:43:53PM +0200, Mike Looijmans wrote:
> The MCP3564R is a 24-bit ADC with 8 multiplexed inputs. The MCP3561R is
> the same device with 2 inputs, the MCP3562R has 4 inputs. The device
> contains one ADC and a multiplexer to select the inputs to the ADC.

My favourite - nothing for a while & then two come along almost at once!
https://lore.kernel.org/all/20230519160145.44208-2-marius.cristea@microchip.com/

Would you mind, since he seems to have sent it first, reviewing his
series?

Cheers,
Conor.

> 
> Signed-off-by: Mike Looijmans <mike.looijmans@...ic.nl>
> 
> ---
> 
>  .../bindings/iio/adc/microchip,mcp356xr.yaml  | 84 +++++++++++++++++++
>  1 file changed, 84 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/iio/adc/microchip,mcp356xr.yaml
> 
> diff --git a/Documentation/devicetree/bindings/iio/adc/microchip,mcp356xr.yaml b/Documentation/devicetree/bindings/iio/adc/microchip,mcp356xr.yaml
> new file mode 100644
> index 000000000000..4aef166894c8
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/iio/adc/microchip,mcp356xr.yaml
> @@ -0,0 +1,84 @@
> +# SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
> +# Copyright 2023 Topic Embedded Systems
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/iio/adc/microchip,mcp356xr.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Microchip MCP3561R/MCP3562R/MCP3564R ADC
> +
> +maintainers:
> +  - Mike Looijmans <mike.looijmans@...ic.nl>
> +
> +description: |
> +  Bindings for the Microchip MCP356xR 8-channel ADC devices. Datasheet and info
> +  can be found at: https://www.microchip.com/en-us/product/MCP3564R
> +
> +properties:
> +  compatible:
> +    enum:
> +      - microchip,mcp3561r
> +      - microchip,mcp3562r
> +      - microchip,mcp3564r
> +
> +  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
> +
> +  drive-open-drain:
> +    description:
> +      Whether to drive the IRQ signal as push-pull (default) or open-drain. Note
> +      that the device requires this pin to become "high", otherwise it will stop
> +      converting.
> +    type: boolean
> +
> +  microchip,device-addr:
> +    description: Device address when multiple chips are present on the same bus.
> +    $ref: /schemas/types.yaml#/definitions/uint32
> +    enum: [0, 1, 2, 3]
> +    default: 1
> +
> +  vref-supply:
> +    description:
> +      Phandle to the external reference voltage supply.
> +      If not specified, the internal voltage reference (2.4V) will be used.
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +
> +allOf:
> +  - $ref: /schemas/spi/spi-peripheral-props.yaml#
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    spi {
> +      #address-cells = <1>;
> +      #size-cells = <0>;
> +
> +      adc@0 {
> +        compatible = "microchip,mcp3564r";
> +        reg = <0>;
> +        interrupt-parent = <&gpio5>;
> +        interrupts = <15 2>;
> +        spi-max-frequency = <20000000>;
> +        microchip,device-addr = <1>;
> +        vref-supply = <&vref_reg>;
> +        clocks = <&xtal>;
> +      };
> +    };
> -- 
> 2.17.1
> 
> 
> Met vriendelijke groet / kind regards,
> 
> Mike Looijmans
> System Expert
> 
> 
> TOPIC Embedded Products B.V.
> Materiaalweg 4, 5681 RJ Best
> The Netherlands
> 
> T: +31 (0) 499 33 69 69
> E: mike.looijmans@...icproducts.com
> W: www.topic.nl
> 
> Please consider the environment before printing this e-mail

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