On Wed, Sep 09, 2020 at 06:59:46PM +0100, Jonathan Cameron wrote:
> From: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
>
> This binding has a few corners that would have been done different today
> but hopefully the yaml schema captures the constraints correctly.
>
> The child node names are not constrained hence the fairly open regexp.
> I've also documented the defaults for the two references that the
> driver seems to use and copied the value descriptions from the header
> because I think they should be in the dt-binding itself.
>
> This is part of a general effort to convert all the IIO bindings
> over to yaml
>
> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
> Cc: Markus Pargmann <mpa@xxxxxxxxxxxxxx>
> Cc: Shawn Guo <shawnguo@xxxxxxxxxx>
> Cc: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
> ---
> .../bindings/iio/adc/fsl,imx25-gcq.txt | 57 --------
> .../bindings/iio/adc/fsl,imx25-gcq.yaml | 129 ++++++++++++++++++
> 2 files changed, 129 insertions(+), 57 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/iio/adc/fsl,imx25-gcq.txt b/Documentation/devicetree/bindings/iio/adc/fsl,imx25-gcq.txt
> deleted file mode 100644
> index eebdcec3dab5..000000000000
> --- a/Documentation/devicetree/bindings/iio/adc/fsl,imx25-gcq.txt
> +++ /dev/null
> @@ -1,57 +0,0 @@
> -Freescale i.MX25 ADC GCQ device
> -
> -This is a generic conversion queue device that can convert any of the
> -analog inputs using the ADC unit of the i.MX25.
> -
> -Required properties:
> - - compatible: Should be "fsl,imx25-gcq".
> - - reg: Should be the register range of the module.
> - - interrupts: Should be the interrupt number of the module.
> - Typically this is <1>.
> - - #address-cells: Should be <1> (setting for the subnodes)
> - - #size-cells: Should be <0> (setting for the subnodes)
> -
> -Optional properties:
> - - vref-ext-supply: The regulator supplying the ADC reference voltage.
> - Required when at least one subnode uses the this reference.
> - - vref-xp-supply: The regulator supplying the ADC reference voltage on pin XP.
> - Required when at least one subnode uses this reference.
> - - vref-yp-supply: The regulator supplying the ADC reference voltage on pin YP.
> - Required when at least one subnode uses this reference.
> -
> -Sub-nodes:
> -Optionally you can define subnodes which define the reference voltage
> -for the analog inputs.
> -
> -Required properties for subnodes:
> - - reg: Should be the number of the analog input.
> - 0: xp
> - 1: yp
> - 2: xn
> - 3: yn
> - 4: wiper
> - 5: inaux0
> - 6: inaux1
> - 7: inaux2
> -Optional properties for subnodes:
> - - fsl,adc-refp: specifies the positive reference input as defined in
> - <dt-bindings/iio/adc/fsl-imx25-gcq.h>
> - - fsl,adc-refn: specifies the negative reference input as defined in
> - <dt-bindings/iio/adc/fsl-imx25-gcq.h>
> -
> -Example:
> -
> - adc: adc@50030800 {
> - compatible = "fsl,imx25-gcq";
> - reg = <0x50030800 0x60>;
> - interrupt-parent = <&tscadc>;
> - interrupts = <1>;
> - #address-cells = <1>;
> - #size-cells = <0>;
> -
> - inaux@5 {
> - reg = <5>;
> - fsl,adc-refp = <MX25_ADC_REFP_INT>;
> - fsl,adc-refn = <MX25_ADC_REFN_NGND>;
> - };
> - };
> diff --git a/Documentation/devicetree/bindings/iio/adc/fsl,imx25-gcq.yaml b/Documentation/devicetree/bindings/iio/adc/fsl,imx25-gcq.yaml
> new file mode 100644
> index 000000000000..6c4e3ef0862c
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/iio/adc/fsl,imx25-gcq.yaml
> @@ -0,0 +1,129 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/iio/adc/fsl,imx25-gcq.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Freescale ADC GCQ device
> +
> +description:
> + This is a generic conversion queue device that can convert any of the
> + analog inputs using the ADC unit of the i.MX25.
> +
> +maintainers:
> + - Markus Pargmann <mpa@xxxxxxxxxxxxxx>
> +
> +properties:
> + compatible:
> + const: fsl,imx25-gcq
> +
> + reg:
> + maxItems: 1
> +
> + interrupts:
> + maxItems: 1
> +
> + vref-ext-supply:
> + description:
> + The regulator supplying the ADC reference voltage.
> + Required when at least one subnode uses the this reference.
> +
> + vref-xp-supply:
> + description:
> + The regulator supplying the ADC reference voltage on pin XP.
> + Required when at least one subnode uses this reference.
> +
> + vref-yp-supply:
> + description:
> + The regulator supplying the ADC reference voltage on pin YP.
> + Required when at least one subnode uses this reference.
> +
> + "#io-channel-cells":
> + const: 1
> +
> + "#address-cells":
> + const: 1
> +
> + "#size-cells":
> + const: 0
> +
> +required:
> + - compatible
> + - reg
> + - interrupts
> + - "#address-cells"
> + - "#size-cells"
> +
> +patternProperties:
> + "[a-z][a-z0-9]+@[0-9a-f]+$":
> + type: object
> + description:
> + Child nodes used to define the reference voltages used for each channel
> +
> + properties:
> + reg:
> + description: |
> + Number of the analog input.
> + 0: xp
> + 1: yp
> + 2: xn
> + 3: yn
> + 4: wiper
> + 5: inaux0
> + 6: inaux1
> + 7: inaux2
> + items:
> + - minimum: 0
> + maximum: 7
> +
> + fsl,adc-refp:
> + $ref: /schemas/types.yaml#/definitions/uint32
> + description: |
> + Specifies the positive reference input as defined in
> + <dt-bindings/iio/adc/fsl-imx25-gcq.h>
> + 0: YP voltage reference
> + 1: XP voltage reference
> + 2: External voltage reference
> + 3: Internal voltage reference (default)
> + minimum: 0
> + maximum: 3
> +
> + fsl,adc-refn:
> + $ref: /schemas/types.yaml#/definitions/uint32
> + description: |
> + Specifies the negative reference input as defined in
> + <dt-bindings/iio/adc/fsl-imx25-gcq.h>
> + 0: XN ground reference
> + 1: YN ground reference
> + 2: Internal ground reference
> + 3: External ground reference (default)
> + minimum: 0
> + maximum: 3
> +
> + required:
> + - reg
Each level needs 'additionalProperties':
additionalProperties: false
With that,
Reviewed-by: Rob Herring <robh@xxxxxxxxxx>
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + #include <dt-bindings/iio/adc/fsl-imx25-gcq.h>
> + soc {
> + #address-cells = <1>;
> + #size-cells = <1>;
> + adc@50030800 {
> + compatible = "fsl,imx25-gcq";
> + reg = <0x50030800 0x60>;
> + interrupt-parent = <&tscadc>;
> + interrupts = <1>;
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + inaux@5 {
> + reg = <5>;
> + fsl,adc-refp = <MX25_ADC_REFP_INT>;
> + fsl,adc-refn = <MX25_ADC_REFN_NGND>;
> + };
> + };
> + };
> +...
> --
> 2.28.0
>
