Add support for Analog Devices AD7124 4-channels and 8-channels ADC.
Signed-off-by: Stefan Popa <[email protected]>
---
Changes in v2:
- Nothing changed.
Changes in v3:
- Removed the "adi,channels" property.
- Used the "reg" property to get the channel number and "adi,diff-channels"
for the differential pins. The "adi,channel-number" property was removed.
- adi,bipolar is of boolean type.
Changes in v4:
- Used the bipolar and diff-channels properties defined in the new adc.txt doc.
.../devicetree/bindings/iio/adc/adi,ad7124.txt | 81 ++++++++++++++++++++++
MAINTAINERS | 1 +
2 files changed, 82 insertions(+)
create mode 100644 Documentation/devicetree/bindings/iio/adc/adi,ad7124.txt
diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7124.txt b/Documentation/devicetree/bindings/iio/adc/adi,ad7124.txt
new file mode 100644
index 0000000..fa0c43b
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7124.txt
@@ -0,0 +1,81 @@
+Analog Devices AD7124 ADC device driver
+
+Required properties for the AD7124:
+ - compatible: Must be one of "adi,ad7124-4" or "adi,ad7124-8"
+ - reg: SPI chip select number for the device
+ - spi-max-frequency: Max SPI frequency to use
+ see: Documentation/devicetree/bindings/spi/spi-bus.txt
+ - clocks: phandle to the master clock (mclk)
+ see: Documentation/devicetree/bindings/clock/clock-bindings.txt
+ - clock-names: Must be "mclk".
+ - interrupts: IRQ line for the ADC
+ see: Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
+
+ Required properties:
+ * #address-cells: Must be 1.
+ * #size-cells: Must be 0.
+
+ Subnode(s) represent the external channels which are connected to the ADC.
+ Each subnode represents one channel and has the following properties:
+ Required properties:
+ * reg: The channel number. It can have up to 4 channels on ad7124-4
+ and 8 channels on ad7124-8, numbered from 0 to 15.
+ * diff-channels: see: Documentation/devicetree/bindings/iio/adc/adc.txt
+
+ Optional properties:
+ * bipolar: see: Documentation/devicetree/bindings/iio/adc/adc.txt
+ * adi,reference-select: Select the reference source to use when
+ converting on the the specific channel. Valid values are:
+ 0: REFIN1(+)/REFIN1(−).
+ 1: REFIN2(+)/REFIN2(−).
+ 3: AVDD
+ If this field is left empty, internal reference is selected.
+
+Optional properties:
+ - refin1-supply: refin1 supply can be used as reference for conversion.
+ - refin2-supply: refin2 supply can be used as reference for conversion.
+ - avdd-supply: avdd supply can be used as reference for conversion.
+
+Example:
+ adc@0 {
+ compatible = "adi,ad7124-4";
+ reg = <0>;
+ spi-max-frequency = <5000000>;
+ interrupts = <25 2>;
+ interrupt-parent = <&gpio>;
+ refin1-supply = <&adc_vref>;
+ clocks = <&ad7124_mclk>;
+ clock-names = "mclk";
+
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ channel@0 {
+ reg = <0>;
+ adi,diff-channels = <0 1>;
+ adi,reference-select = <0>;
+ adi,gain = <2>;
+ adi,odr-hz = <10>;
+ };
+
+ channel@1 {
+ reg = <1>;
+ adi,bipolar;
+ adi,diff-channels = <2 3>;
+ adi,reference-select = <0>;
+ adi,gain = <4>;
+ adi,odr-hz = <50>;
+ };
+
+ channel@2 {
+ reg = <2>;
+ adi,diff-channels = <4 5>;
+ adi,gain = <128>;
+ adi,odr-hz = <19200>;
+ };
+
+ channel@3 {
+ reg = <3>;
+ adi,diff-channels = <6 7>;
+ };
+ };
diff --git a/MAINTAINERS b/MAINTAINERS
index 3a1bfcb..f2fa508 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -845,6 +845,7 @@ L: [email protected]
W: http://ez.analog.com/community/linux-device-drivers
S: Supported
F: drivers/iio/adc/ad7124.c
+F: Documentation/devicetree/bindings/iio/adc/adi,ad7124.txt
ANALOG DEVICES INC AD9389B DRIVER
M: Hans Verkuil <[email protected]>
--
2.7.4
On Fri, 9 Nov 2018 17:43:00 +0200
Stefan Popa <[email protected]> wrote:
> Add support for Analog Devices AD7124 4-channels and 8-channels ADC.
>
> Signed-off-by: Stefan Popa <[email protected]>
Your example still includes the other things that I think you have now dropped.
gain and odr.
> ---
> Changes in v2:
> - Nothing changed.
> Changes in v3:
> - Removed the "adi,channels" property.
> - Used the "reg" property to get the channel number and "adi,diff-channels"
> for the differential pins. The "adi,channel-number" property was removed.
> - adi,bipolar is of boolean type.
> Changes in v4:
> - Used the bipolar and diff-channels properties defined in the new adc.txt doc.
>
> .../devicetree/bindings/iio/adc/adi,ad7124.txt | 81 ++++++++++++++++++++++
> MAINTAINERS | 1 +
> 2 files changed, 82 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/iio/adc/adi,ad7124.txt
>
> diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7124.txt b/Documentation/devicetree/bindings/iio/adc/adi,ad7124.txt
> new file mode 100644
> index 0000000..fa0c43b
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7124.txt
> @@ -0,0 +1,81 @@
> +Analog Devices AD7124 ADC device driver
> +
> +Required properties for the AD7124:
> + - compatible: Must be one of "adi,ad7124-4" or "adi,ad7124-8"
> + - reg: SPI chip select number for the device
> + - spi-max-frequency: Max SPI frequency to use
> + see: Documentation/devicetree/bindings/spi/spi-bus.txt
> + - clocks: phandle to the master clock (mclk)
> + see: Documentation/devicetree/bindings/clock/clock-bindings.txt
> + - clock-names: Must be "mclk".
> + - interrupts: IRQ line for the ADC
> + see: Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
Given the driver doesn't currently use it, should perhaps be optional?
> +
> + Required properties:
> + * #address-cells: Must be 1.
> + * #size-cells: Must be 0.
> +
> + Subnode(s) represent the external channels which are connected to the ADC.
> + Each subnode represents one channel and has the following properties:
> + Required properties:
> + * reg: The channel number. It can have up to 4 channels on ad7124-4
> + and 8 channels on ad7124-8, numbered from 0 to 15.
> + * diff-channels: see: Documentation/devicetree/bindings/iio/adc/adc.txt
> +
> + Optional properties:
> + * bipolar: see: Documentation/devicetree/bindings/iio/adc/adc.txt
> + * adi,reference-select: Select the reference source to use when
> + converting on the the specific channel. Valid values are:
> + 0: REFIN1(+)/REFIN1(−).
> + 1: REFIN2(+)/REFIN2(−).
> + 3: AVDD
> + If this field is left empty, internal reference is selected.
> +
> +Optional properties:
> + - refin1-supply: refin1 supply can be used as reference for conversion.
> + - refin2-supply: refin2 supply can be used as reference for conversion.
> + - avdd-supply: avdd supply can be used as reference for conversion.
> +
> +Example:
> + adc@0 {
> + compatible = "adi,ad7124-4";
> + reg = <0>;
> + spi-max-frequency = <5000000>;
> + interrupts = <25 2>;
> + interrupt-parent = <&gpio>;
> + refin1-supply = <&adc_vref>;
> + clocks = <&ad7124_mclk>;
> + clock-names = "mclk";
> +
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + channel@0 {
> + reg = <0>;
> + adi,diff-channels = <0 1>;
> + adi,reference-select = <0>;
> + adi,gain = <2>;
> + adi,odr-hz = <10>;
I think you have dropped these two..
> + };
> +
> + channel@1 {
> + reg = <1>;
> + adi,bipolar;
> + adi,diff-channels = <2 3>;
> + adi,reference-select = <0>;
> + adi,gain = <4>;
> + adi,odr-hz = <50>;
> + };
> +
> + channel@2 {
> + reg = <2>;
> + adi,diff-channels = <4 5>;
> + adi,gain = <128>;
> + adi,odr-hz = <19200>;
> + };
> +
> + channel@3 {
> + reg = <3>;
> + adi,diff-channels = <6 7>;
> + };
> + };
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 3a1bfcb..f2fa508 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -845,6 +845,7 @@ L: [email protected]
> W: http://ez.analog.com/community/linux-device-drivers
> S: Supported
> F: drivers/iio/adc/ad7124.c
> +F: Documentation/devicetree/bindings/iio/adc/adi,ad7124.txt
>
> ANALOG DEVICES INC AD9389B DRIVER
> M: Hans Verkuil <[email protected]>
On Du, 2018-11-11 at 12:19 +0000, Jonathan Cameron wrote:
>
> On Fri, 9 Nov 2018 17:43:00 +0200
> Stefan Popa <[email protected]> wrote:
>
> >
> >
> > Add support for Analog Devices AD7124 4-channels and 8-channels ADC.
> >
> > Signed-off-by: Stefan Popa <[email protected]>
> Your example still includes the other things that I think you have now
> dropped.
> gain and odr.
>
You are right! I am sorry about this.
>
> >
> >
> > ---
> > Changes in v2:
> > - Nothing changed.
> > Changes in v3:
> > - Removed the "adi,channels" property.
> > - Used the "reg" property to get the channel number and "adi,diff-
> > channels"
> > for the differential pins. The "adi,channel-number" property was
> > removed.
> > - adi,bipolar is of boolean type.
> > Changes in v4:
> > - Used the bipolar and diff-channels properties defined in the new
> > adc.txt doc.
> >
> > .../devicetree/bindings/iio/adc/adi,ad7124.txt | 81
> > ++++++++++++++++++++++
> > MAINTAINERS | 1 +
> > 2 files changed, 82 insertions(+)
> > create mode 100644
> > Documentation/devicetree/bindings/iio/adc/adi,ad7124.txt
> >
> > diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7124.txt
> > b/Documentation/devicetree/bindings/iio/adc/adi,ad7124.txt
> > new file mode 100644
> > index 0000000..fa0c43b
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7124.txt
> > @@ -0,0 +1,81 @@
> > +Analog Devices AD7124 ADC device driver
> > +
> > +Required properties for the AD7124:
> > + - compatible: Must be one of "adi,ad7124-4" or "adi,ad7124-8"
> > + - reg: SPI chip select number for the device
> > + - spi-max-frequency: Max SPI frequency to use
> > + see: Documentation/devicetree/bindings/spi/spi-bus.txt
> > + - clocks: phandle to the master clock (mclk)
> > + see: Documentation/devicetree/bindings/clock/clock-
> > bindings.txt
> > + - clock-names: Must be "mclk".
> > + - interrupts: IRQ line for the ADC
> > + see: Documentation/devicetree/bindings/interrupt-
> > controller/interrupts.txt
> Given the driver doesn't currently use it, should perhaps be optional?
>
The interrupt is actually required by ad_sigma_delta.
>
> >
> >
> > +
> > + Required properties:
> > + * #address-cells: Must be 1.
> > + * #size-cells: Must be 0.
> > +
> > + Subnode(s) represent the external channels which are
> > connected to the ADC.
> > + Each subnode represents one channel and has the following
> > properties:
> > + Required properties:
> > + * reg: The channel number. It can have up to 4
> > channels on ad7124-4
> > + and 8 channels on ad7124-8, numbered from 0
> > to 15.
> > + * diff-channels: see:
> > Documentation/devicetree/bindings/iio/adc/adc.txt
> > +
> > + Optional properties:
> > + * bipolar: see:
> > Documentation/devicetree/bindings/iio/adc/adc.txt
> > + * adi,reference-select: Select the reference
> > source to use when
> > + converting on the the specific channel.
> > Valid values are:
> > + 0: REFIN1(+)/REFIN1(−).
> > + 1: REFIN2(+)/REFIN2(−).
> > + 3: AVDD
> > + If this field is left empty, internal
> > reference is selected.
> > +
> > +Optional properties:
> > + - refin1-supply: refin1 supply can be used as reference for
> > conversion.
> > + - refin2-supply: refin2 supply can be used as reference for
> > conversion.
> > + - avdd-supply: avdd supply can be used as reference for
> > conversion.
> > +
> > +Example:
> > + adc@0 {
> > + compatible = "adi,ad7124-4";
> > + reg = <0>;
> > + spi-max-frequency = <5000000>;
> > + interrupts = <25 2>;
> > + interrupt-parent = <&gpio>;
> > + refin1-supply = <&adc_vref>;
> > + clocks = <&ad7124_mclk>;
> > + clock-names = "mclk";
> > +
> > + #address-cells = <1>;
> > + #size-cells = <0>;
> > +
> > + channel@0 {
> > + reg = <0>;
> > + adi,diff-channels = <0 1>;
> > + adi,reference-select = <0>;
> > + adi,gain = <2>;
> > + adi,odr-hz = <10>;
> I think you have dropped these two..
>
> >
> >
> > + };
> > +
> > + channel@1 {
> > + reg = <1>;
> > + adi,bipolar;
> > + adi,diff-channels = <2 3>;
> > + adi,reference-select = <0>;
> > + adi,gain = <4>;
> > + adi,odr-hz = <50>;
> > + };
> > +
> > + channel@2 {
> > + reg = <2>;
> > + adi,diff-channels = <4 5>;
> > + adi,gain = <128>;
> > + adi,odr-hz = <19200>;
> > + };
> > +
> > + channel@3 {
> > + reg = <3>;
> > + adi,diff-channels = <6 7>;
> > + };
> > + };
> > diff --git a/MAINTAINERS b/MAINTAINERS
> > index 3a1bfcb..f2fa508 100644
> > --- a/MAINTAINERS
> > +++ b/MAINTAINERS
> > @@ -845,6 +845,7 @@ L: [email protected]
> > W: http://ez.analog.com/community/linux-device-drivers
> > S: Supported
> > F: drivers/iio/adc/ad7124.c
> > +F: Documentation/devicetree/bindings/iio/adc/adi,ad7124.txt
> >
> > ANALOG DEVICES INC AD9389B DRIVER
> > M: Hans Verkuil <[email protected]>