diff mbox series

[v5,5/7] dt-bindings: iio: adc: Add AD4000

Message ID 10678612efbbd97bb47a31f4a062607cf35b03f9.1719351923.git.marcelo.schmitt@analog.com (mailing list archive)
State Changes Requested
Headers show
Series Add support for AD4000 series of ADCs | expand

Commit Message

Marcelo Schmitt June 25, 2024, 9:55 p.m. UTC
Add device tree documentation for AD4000 series of ADC devices.

Signed-off-by: Marcelo Schmitt <marcelo.schmitt@analog.com>
---
 .../bindings/iio/adc/adi,ad4000.yaml          | 190 ++++++++++++++++++
 MAINTAINERS                                   |   7 +
 2 files changed, 197 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/adc/adi,ad4000.yaml

Comments

Conor Dooley June 26, 2024, 11:34 a.m. UTC | #1
On Tue, Jun 25, 2024 at 06:55:03PM -0300, Marcelo Schmitt wrote:
> Add device tree documentation for AD4000 series of ADC devices.
> 
> Signed-off-by: Marcelo Schmitt <marcelo.schmitt@analog.com>
> ---
>  .../bindings/iio/adc/adi,ad4000.yaml          | 190 ++++++++++++++++++
>  MAINTAINERS                                   |   7 +
>  2 files changed, 197 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/iio/adc/adi,ad4000.yaml
> 
> diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad4000.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad4000.yaml
> new file mode 100644
> index 000000000000..76035dff5474
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad4000.yaml
> @@ -0,0 +1,190 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/iio/adc/adi,ad4000.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Analog Devices AD4000 and similar Analog to Digital Converters
> +
> +maintainers:
> +  - Marcelo Schmitt <marcelo.schmitt@analog.com>
> +
> +description: |
> +  Analog Devices AD4000 family of Analog to Digital Converters with SPI support.
> +  Specifications can be found at:
> +    https://www.analog.com/media/en/technical-documentation/data-sheets/ad4000-4004-4008.pdf
> +    https://www.analog.com/media/en/technical-documentation/data-sheets/ad4001-4005.pdf
> +    https://www.analog.com/media/en/technical-documentation/data-sheets/ad4002-4006-4010.pdf
> +    https://www.analog.com/media/en/technical-documentation/data-sheets/ad4003-4007-4011.pdf
> +    https://www.analog.com/media/en/technical-documentation/data-sheets/ad4020-4021-4022.pdf
> +    https://www.analog.com/media/en/technical-documentation/data-sheets/adaq4001.pdf
> +    https://www.analog.com/media/en/technical-documentation/data-sheets/adaq4003.pdf
> +
> +$ref: /schemas/spi/spi-peripheral-props.yaml#
> +
> +properties:
> +  compatible:
> +    oneOf:
> +      - const: adi,ad4000
> +      - items:
> +          - enum:
> +              - adi,ad4004
> +              - adi,ad4008
> +          - const: adi,ad4000

> +      - const: adi,ad4001
> +      - items:
> +          - enum:
> +              - adi,ad4005
> +          - const: adi,ad4001

> +      - const: adi,ad4002
> +      - items:
> +          - enum:
> +              - adi,ad4006
> +              - adi,ad4010
> +          - const: adi,ad4002

> +      - const: adi,ad4003
> +      - items:
> +          - enum:
> +              - adi,ad4007
> +              - adi,ad4011
> +          - const: adi,ad4003

> +      - const: adi,ad4020
> +      - items:
> +          - enum:
> +              - adi,ad4021
> +              - adi,ad4022
> +          - const: adi,ad4020

> +      - const: adi,adaq4001

> +      - const: adi,adaq4003

I think some blank lines, maybe like the above, would go a long way with
this list of compatibles.

> +
> +  reg:
> +    maxItems: 1
> +
> +  spi-max-frequency:
> +    maximum: 102040816 # for VIO > 2.7 V, 81300813 for VIO > 1.7 V
> +
> +  adi,sdi-pin:
> +    $ref: /schemas/types.yaml#/definitions/string
> +    enum: [ high, low, cs ]

    enum: [ high, low, cs, sdi ]
    default: sdi

I'd do this, so that the default is documented in the binding, not in
the description text.

Otherwise, this looks good to me.
Marcelo Schmitt June 26, 2024, 1:34 p.m. UTC | #2
On 06/26, Conor Dooley wrote:
> On Tue, Jun 25, 2024 at 06:55:03PM -0300, Marcelo Schmitt wrote:
> > Add device tree documentation for AD4000 series of ADC devices.
> > 
> > Signed-off-by: Marcelo Schmitt <marcelo.schmitt@analog.com>
> > ---
> >  .../bindings/iio/adc/adi,ad4000.yaml          | 190 ++++++++++++++++++
> >  MAINTAINERS                                   |   7 +
...
> > +properties:
> > +  compatible:
> > +    oneOf:
> > +      - const: adi,ad4000
> > +      - items:
> > +          - enum:
> > +              - adi,ad4004
> > +              - adi,ad4008
> > +          - const: adi,ad4000
> 
> > +      - const: adi,ad4001
> > +      - items:
> > +          - enum:
> > +              - adi,ad4005
> > +          - const: adi,ad4001
> 
> > +      - const: adi,ad4002
> > +      - items:
> > +          - enum:
> > +              - adi,ad4006
> > +              - adi,ad4010
> > +          - const: adi,ad4002
> 
> > +      - const: adi,ad4003
> > +      - items:
> > +          - enum:
> > +              - adi,ad4007
> > +              - adi,ad4011
> > +          - const: adi,ad4003
> 
> > +      - const: adi,ad4020
> > +      - items:
> > +          - enum:
> > +              - adi,ad4021
> > +              - adi,ad4022
> > +          - const: adi,ad4020
> 
> > +      - const: adi,adaq4001
> 
> > +      - const: adi,adaq4003
> 
> I think some blank lines, maybe like the above, would go a long way with
> this list of compatibles.
> 
> > +
> > +  reg:
> > +    maxItems: 1
> > +
> > +  spi-max-frequency:
> > +    maximum: 102040816 # for VIO > 2.7 V, 81300813 for VIO > 1.7 V
> > +
> > +  adi,sdi-pin:
> > +    $ref: /schemas/types.yaml#/definitions/string
> > +    enum: [ high, low, cs ]
> 
>     enum: [ high, low, cs, sdi ]
>     default: sdi
> 
> I'd do this, so that the default is documented in the binding, not in
> the description text.
> 
> Otherwise, this looks good to me.

Ack, will do.
Thanks
Conor Dooley June 26, 2024, 3:55 p.m. UTC | #3
On Wed, Jun 26, 2024 at 10:34:24AM -0300, Marcelo Schmitt wrote:
> On 06/26, Conor Dooley wrote:
> > On Tue, Jun 25, 2024 at 06:55:03PM -0300, Marcelo Schmitt wrote:
> > > Add device tree documentation for AD4000 series of ADC devices.
> > > 
> > > Signed-off-by: Marcelo Schmitt <marcelo.schmitt@analog.com>
> > > ---
> > >  .../bindings/iio/adc/adi,ad4000.yaml          | 190 ++++++++++++++++++
> > >  MAINTAINERS                                   |   7 +
> ...
> > > +properties:
> > > +  compatible:
> > > +    oneOf:
> > > +      - const: adi,ad4000
> > > +      - items:
> > > +          - enum:
> > > +              - adi,ad4004
> > > +              - adi,ad4008
> > > +          - const: adi,ad4000
> > 
> > > +      - const: adi,ad4001
> > > +      - items:
> > > +          - enum:
> > > +              - adi,ad4005
> > > +          - const: adi,ad4001
> > 
> > > +      - const: adi,ad4002
> > > +      - items:
> > > +          - enum:
> > > +              - adi,ad4006
> > > +              - adi,ad4010
> > > +          - const: adi,ad4002
> > 
> > > +      - const: adi,ad4003
> > > +      - items:
> > > +          - enum:
> > > +              - adi,ad4007
> > > +              - adi,ad4011
> > > +          - const: adi,ad4003
> > 
> > > +      - const: adi,ad4020
> > > +      - items:
> > > +          - enum:
> > > +              - adi,ad4021
> > > +              - adi,ad4022
> > > +          - const: adi,ad4020
> > 
> > > +      - const: adi,adaq4001
> > 
> > > +      - const: adi,adaq4003
> > 
> > I think some blank lines, maybe like the above, would go a long way with
> > this list of compatibles.
> > 
> > > +
> > > +  reg:
> > > +    maxItems: 1
> > > +
> > > +  spi-max-frequency:
> > > +    maximum: 102040816 # for VIO > 2.7 V, 81300813 for VIO > 1.7 V
> > > +
> > > +  adi,sdi-pin:
> > > +    $ref: /schemas/types.yaml#/definitions/string
> > > +    enum: [ high, low, cs ]
> > 
> >     enum: [ high, low, cs, sdi ]
> >     default: sdi
> > 
> > I'd do this, so that the default is documented in the binding, not in
> > the description text.
> > 
> > Otherwise, this looks good to me.
> 
> Ack, will do.

With those,
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>

Thanks,
Conor.
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad4000.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad4000.yaml
new file mode 100644
index 000000000000..76035dff5474
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/adi,ad4000.yaml
@@ -0,0 +1,190 @@ 
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/adc/adi,ad4000.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Analog Devices AD4000 and similar Analog to Digital Converters
+
+maintainers:
+  - Marcelo Schmitt <marcelo.schmitt@analog.com>
+
+description: |
+  Analog Devices AD4000 family of Analog to Digital Converters with SPI support.
+  Specifications can be found at:
+    https://www.analog.com/media/en/technical-documentation/data-sheets/ad4000-4004-4008.pdf
+    https://www.analog.com/media/en/technical-documentation/data-sheets/ad4001-4005.pdf
+    https://www.analog.com/media/en/technical-documentation/data-sheets/ad4002-4006-4010.pdf
+    https://www.analog.com/media/en/technical-documentation/data-sheets/ad4003-4007-4011.pdf
+    https://www.analog.com/media/en/technical-documentation/data-sheets/ad4020-4021-4022.pdf
+    https://www.analog.com/media/en/technical-documentation/data-sheets/adaq4001.pdf
+    https://www.analog.com/media/en/technical-documentation/data-sheets/adaq4003.pdf
+
+$ref: /schemas/spi/spi-peripheral-props.yaml#
+
+properties:
+  compatible:
+    oneOf:
+      - const: adi,ad4000
+      - items:
+          - enum:
+              - adi,ad4004
+              - adi,ad4008
+          - const: adi,ad4000
+      - const: adi,ad4001
+      - items:
+          - enum:
+              - adi,ad4005
+          - const: adi,ad4001
+      - const: adi,ad4002
+      - items:
+          - enum:
+              - adi,ad4006
+              - adi,ad4010
+          - const: adi,ad4002
+      - const: adi,ad4003
+      - items:
+          - enum:
+              - adi,ad4007
+              - adi,ad4011
+          - const: adi,ad4003
+      - const: adi,ad4020
+      - items:
+          - enum:
+              - adi,ad4021
+              - adi,ad4022
+          - const: adi,ad4020
+      - const: adi,adaq4001
+      - const: adi,adaq4003
+
+  reg:
+    maxItems: 1
+
+  spi-max-frequency:
+    maximum: 102040816 # for VIO > 2.7 V, 81300813 for VIO > 1.7 V
+
+  adi,sdi-pin:
+    $ref: /schemas/types.yaml#/definitions/string
+    enum: [ high, low, cs ]
+    description:
+      Describes how the ADC SDI pin is wired. When this property is omitted,
+      ADC SDI is connected to host SDO. "high" indicates that the ADC SDI pin
+      is hard-wired to logic high (VIO). "low" indicates that it is hard-wired
+      low (GND). "cs" indicates that the ADC SDI pin is connected to the host
+      CS line.
+
+  '#daisy-chained-devices': true
+
+  vdd-supply:
+    description: A 1.8V supply that powers the chip (VDD).
+
+  vio-supply:
+    description:
+      A 1.8V to 5.5V supply for the digital inputs and outputs (VIO).
+
+  ref-supply:
+    description:
+      A 2.5 to 5V supply for the external reference voltage (REF).
+
+  cnv-gpios:
+    description:
+      When provided, this property indicates the GPIO that is connected to the
+      CNV pin.
+    maxItems: 1
+
+  adi,high-z-input:
+    type: boolean
+    description:
+      High-Z mode allows the amplifier and RC filter in front of the ADC to be
+      chosen based on the signal bandwidth of interest, rather than the settling
+      requirements of the switched capacitor SAR ADC inputs.
+
+  adi,gain-milli:
+    description: |
+      The hardware gain applied to the ADC input (in milli units).
+      The gain provided by the ADC input scaler is defined by the hardware
+      connections between chip pins OUT+, R1K-, R1K1-, R1K+, R1K1+, and OUT-.
+      If not present, default to 1000 (no actual gain applied).
+    $ref: /schemas/types.yaml#/definitions/uint16
+    enum: [454, 909, 1000, 1900]
+    default: 1000
+
+  interrupts:
+    description:
+      The SDO pin can also function as a busy indicator. This node should be
+      connected to an interrupt that is triggered when the SDO line goes low
+      while the SDI line is high and the CNV line is low ("3-wire" mode) or the
+      SDI line is low and the CNV line is high ("4-wire" mode); or when the SDO
+      line goes high while the SDI and CNV lines are high (chain mode),
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - vdd-supply
+  - vio-supply
+  - ref-supply
+
+allOf:
+  # The configuration register can only be accessed if SDI is connected to MOSI
+  - if:
+      required:
+        - adi,sdi-pin
+    then:
+      properties:
+        adi,high-z-input: false
+  # chain mode has lower SCLK max rate
+  - if:
+      required:
+        - '#daisy-chained-devices'
+    then:
+      properties:
+        spi-max-frequency:
+          maximum: 50000000 # for VIO > 2.7 V, 40000000 for VIO > 1.7 V
+  # Gain property only applies to ADAQ devices
+  - if:
+      properties:
+        compatible:
+          not:
+            contains:
+              enum:
+                - adi,adaq4001
+                - adi,adaq4003
+    then:
+      properties:
+        adi,gain-milli: false
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        adc@0 {
+            compatible = "adi,ad4020";
+            reg = <0>;
+            spi-max-frequency = <71000000>;
+            vdd-supply = <&supply_1_8V>;
+            vio-supply = <&supply_1_8V>;
+            ref-supply = <&supply_5V>;
+            adi,sdi-pin = "cs";
+            cnv-gpios = <&gpio0 88 GPIO_ACTIVE_HIGH>;
+        };
+    };
+  - |
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        adc@0 {
+            compatible = "adi,adaq4003";
+            reg = <0>;
+            spi-max-frequency = <80000000>;
+            vdd-supply = <&supply_1_8V>;
+            vio-supply = <&supply_1_8V>;
+            ref-supply = <&supply_5V>;
+            adi,high-z-input;
+            adi,gain-milli = /bits/ 16 <454>;
+        };
+    };
diff --git a/MAINTAINERS b/MAINTAINERS
index 9517093d889d..9aa6531f7cf2 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1199,6 +1199,13 @@  W:	https://ez.analog.com/linux-software-drivers
 F:	Documentation/devicetree/bindings/iio/dac/adi,ad3552r.yaml
 F:	drivers/iio/dac/ad3552r.c
 
+ANALOG DEVICES INC AD4000 DRIVER
+M:	Marcelo Schmitt <marcelo.schmitt@analog.com>
+L:	linux-iio@vger.kernel.org
+S:	Supported
+W:	https://ez.analog.com/linux-software-drivers
+F:	Documentation/devicetree/bindings/iio/adc/adi,ad4000.yaml
+
 ANALOG DEVICES INC AD4130 DRIVER
 M:	Cosmin Tanislav <cosmin.tanislav@analog.com>
 L:	linux-iio@vger.kernel.org