Re: [PATCH 2/2] dt-bindings: iio: accel: fxls8962af: add bindings

[Jonathan Cameron <jic23@xxxxxxxxxx>]

On Fri, 16 Apr 2021 11:30:39 +0200
Sean Nyekjaer <sean@xxxxxxxxxx> wrote:

> Add devicetree binding for the NXP FXLS8962AF/FXLS8962AF
> accelerometer sensor.
> 
> Signed-off-by: Sean Nyekjaer <sean@xxxxxxxxxx>
> ---
> Changes:
>  - Checked with 'make DT_CHECKER_FLAGS=-m dt_binding_check'
> 
>  .../bindings/iio/accel/nxp,fxls8962af.yaml    | 73 +++++++++++++++++++
>  1 file changed, 73 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/iio/accel/nxp,fxls8962af.yaml
> 
> diff --git a/Documentation/devicetree/bindings/iio/accel/nxp,fxls8962af.yaml b/Documentation/devicetree/bindings/iio/accel/nxp,fxls8962af.yaml
> new file mode 100644
> index 000000000000..57322ec8df81
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/iio/accel/nxp,fxls8962af.yaml
> @@ -0,0 +1,73 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/iio/accel/nxp,fxls8962af.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: NXP FXLS8962AF/FXLS8964AF Accelerometer driver
> +
> +maintainers:
> +  - Sean Nyekjaer <sean@xxxxxxxxxx>
> +
> +description: |
> +  NXP FXLS8962AF/FXLS8964AF Accelerometer driver that supports
> +  SPI and I2C interface.
> +    https://www.nxp.com/docs/en/data-sheet/FXLS8962AF.pdf
> +    https://www.nxp.com/docs/en/data-sheet/FXLS8964AF.pdf
> +
> +properties:
> +  compatible:
> +    enum:
> +      - nxp,fxls8962af
> +      - nxp,fxls8964af
> +
> +  reg:
> +    maxItems: 1
> +
> +  vdd-supply:
> +    description: phandle to the regulator that provides power to the accelerometer
> +
> +  spi-max-frequency: true
> +
> +  interrupts:
> +    maxItems: 1
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts

It's rare to actually 'require' interrupts for an accelerometer.
We tend to rapidly find someone has a board where the interrupt isn't wired.
Given it's usually fairly easy to implement the no interrupt case by
just having an alternative iio_info structure in the driver it would be
good to have that from the start if possible.

> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/gpio/gpio.h>
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +    i2c0 {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        /* Example for a I2C device node */
> +        accelerometer@62 {
> +            compatible = "nxp,fxls8962af";
> +            reg = <0x62>;
> +            interrupt-parent = <&gpio0>;
> +            interrupts = <0 IRQ_TYPE_LEVEL_HIGH>;
> +        };
> +    };
> +  - |
> +    #include <dt-bindings/gpio/gpio.h>
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +    spi0 {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        /* Example for a SPI device node */
> +        accelerometer@0 {
> +            compatible = "nxp,fxls8962af";
> +            reg = <0>;
> +            spi-max-frequency = <4000000>;
> +            interrupt-parent = <&gpio0>;
> +            interrupts = <0 IRQ_TYPE_LEVEL_HIGH>;
> +        };
> +    };