On 29/01/15 14:09, Markus Pargmann wrote:
> The documentation describes the bindings for the imx25 GCQ unit which is
> essentially a generic conversion queue using the imx25 ADC.
>
> Signed-off-by: Markus Pargmann <mpa@xxxxxxxxxxxxxx>
> ---
>
> Notes:
> Changes in v6:
> - Moved the raw_read code out to a different function to cleanup the code
To be picky, that's in a later patch rather than this one...
> - Changed bindings to use adc-refp and adc-refn. Also a bit of cleanup in the
> setup routine.
> - Added defines for a complete list of references in the dt binding macros
>
> Changes in v5:
> - Fixed locking
> - Removed module owner
>
> .../devicetree/bindings/iio/adc/fsl,imx25-gcq.txt | 54 ++++++++++++++++++++++
> 1 file changed, 54 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/iio/adc/fsl,imx25-gcq.txt
>
> diff --git a/Documentation/devicetree/bindings/iio/adc/fsl,imx25-gcq.txt b/Documentation/devicetree/bindings/iio/adc/fsl,imx25-gcq.txt
> new file mode 100644
> index 000000000000..9f7c08990034
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/iio/adc/fsl,imx25-gcq.txt
> @@ -0,0 +1,54 @@
> +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>.
> + - interrupt-parent: phandle to the tsadc module of the i.MX25.
> + - #address-cells: Should be <1> (setting for the subnodes)
> + - #size-cells: Should be <0> (setting for the subnodes)
> +
> +Optional properties:
> + - vref-supply: The regulator supplying the ADC reference voltage.
> + Required when at least one subnode uses the external reference.
Note, as commented on next patch, the regulator request should reflect
this dependency.
> +
> +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_REF_INT>;
> + fsl,adc-refn = <MX25_ADC_REF_NGND>;
> + };
> + };
>
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