On Wed, 16 Sep 2020 11:33:31 +0100
Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx> wrote:
> On Wed, 9 Sep 2020 18:59:46 +0100
> Jonathan Cameron <jic23@xxxxxxxxxx> 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>
>
> Update Markus' email address. If Markus is fine with it, I'll update in
> the maintainers line in the binding as well.
> Hope this is the same Markus Pargmann!
>
> This address is from a 2016 thread, so may well bounce as well :(
Bounced as well.
Shawn / Sascha any suggestions for a suitable maintainer on this, or
a more recent address for Markus?
If not I'll pick it up I'll put myself in there and we can update it
when someone steps up in then future.
Jonathan
>
>
> Thanks,
>
> Jonathan
>
>
> > ---
> > .../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
> > +
> > +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>;
> > + };
> > + };
> > + };
> > +...
>
