On 07/12/15 17:39, Rob Herring wrote:
> On Sun, Dec 06, 2015 at 08:52:15PM +0100, 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>
>
> Acked-by: Rob Herring <robh@xxxxxxxxxx>
Acked-by: Jonathan Cameron <jic23@xxxxxxxxxx>
>
>> ---
>>
>> Notes:
>> Changes in v9:
>> - Added the dt-bindings header to this patch instead of the driver
>>
>> Changes in v6:
>> - Changed bindings to use adc-refp and adc-refn. Also a bit of cleanup in the
>> setup routine.
>>
>> Changes in v5:
>> - Fixed locking
>> - Removed module owner
>>
>> .../devicetree/bindings/iio/adc/fsl,imx25-gcq.txt | 58 ++++++++++++++++++++++
>> include/dt-bindings/iio/adc/fsl-imx25-gcq.h | 18 +++++++
>> 2 files changed, 76 insertions(+)
>> create mode 100644 Documentation/devicetree/bindings/iio/adc/fsl,imx25-gcq.txt
>> create mode 100644 include/dt-bindings/iio/adc/fsl-imx25-gcq.h
>>
>> 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..b0866d36a307
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/iio/adc/fsl,imx25-gcq.txt
>> @@ -0,0 +1,58 @@
>> +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-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/include/dt-bindings/iio/adc/fsl-imx25-gcq.h b/include/dt-bindings/iio/adc/fsl-imx25-gcq.h
>> new file mode 100644
>> index 000000000000..87abdd4a7674
>> --- /dev/null
>> +++ b/include/dt-bindings/iio/adc/fsl-imx25-gcq.h
>> @@ -0,0 +1,18 @@
>> +/*
>> + * This header provides constants for configuring the I.MX25 ADC
>> + */
>> +
>> +#ifndef _DT_BINDINGS_IIO_ADC_FS_IMX25_GCQ_H
>> +#define _DT_BINDINGS_IIO_ADC_FS_IMX25_GCQ_H
>> +
>> +#define MX25_ADC_REFP_YP 0 /* YP voltage reference */
>> +#define MX25_ADC_REFP_XP 1 /* XP voltage reference */
>> +#define MX25_ADC_REFP_EXT 2 /* External voltage reference */
>> +#define MX25_ADC_REFP_INT 3 /* Internal voltage reference */
>> +
>> +#define MX25_ADC_REFN_XN 0 /* XN ground reference */
>> +#define MX25_ADC_REFN_YN 1 /* YN ground reference */
>> +#define MX25_ADC_REFN_NGND 2 /* Internal ground reference */
>> +#define MX25_ADC_REFN_NGND2 3 /* External ground reference */
>> +
>> +#endif
>> --
>> 2.6.2
>>
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