Re: [PATCH v4 4/8] dt-bindings: iio: imu: Add bindings for ADI ADIS16607

[Jonathan Cameron <jic23@kernel.org>]

On Fri, 23 Oct 2026 12:30:21 +0300
Radu Sabau via B4 Relay <devnull+radu.sabau.analog.com@kernel.org> wrote:

> From: Radu Sabau <radu.sabau@analog.com>
> 
> Add device tree bindings for the Analog Devices ADIS16607 Precision
> MEMS Inertial Measurement Unit. The ADIS16607 integrates a triaxial
> gyroscope, triaxial accelerometer, and temperature sensor, and
> communicates over SPI Half-Duplex.
> 
> Two variants are supported, adis16607-2 and adis16607-3, differing
> only in gyroscope full-scale range (±450°/s and ±2000°/s
> respectively).
> 
> The binding exposes optional properties for:
>   - An external clock for sync mode (falling back to the internal 8 kHz
>     clock when absent)
>   - A hardware reset GPIO (active low)
> 
> Reviewed-by: Rob Herring (Arm) <robh@kernel.org>

There is enough new stuff in here I'd have dropped Rob's tag.

> Signed-off-by: Radu Sabau <radu.sabau@analog.com>
> ---

and noted you had done so here with a breadcrumb of why, which
is the gpio handling

>  .../devicetree/bindings/iio/imu/adi,adis16607.yaml | 94 ++++++++++++++++++++++
>  MAINTAINERS                                        |  7 ++
>  2 files changed, 101 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/iio/imu/adi,adis16607.yaml b/Documentation/devicetree/bindings/iio/imu/adi,adis16607.yaml
> new file mode 100644
> index 000000000000..4545f942365c
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/iio/imu/adi,adis16607.yaml
> @@ -0,0 +1,94 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/iio/imu/adi,adis16607.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Analog Devices ADIS16607 IMU
> +
> +maintainers:
> +  - Radu Sabau <radu.sabau@analog.com>
> +
> +description: |
> +  Analog Devices ADIS16607 Precision MEMS Inertial Measurement Unit (IMU)
> +  with a triaxial gyroscope, triaxial accelerometer, and temperature sensor.
> +  Uses SPI Half-Duplex communication protocol.
> +
> +  The device has five GPIO pins (GPIO0-GPIO4 in the datasheet), each
> +  independently selectable for a single fixed function. This binding
> +  exposes GPIO0's reset function as reset-gpios; GPIO2's sync function
> +  is modeled via the clocks property, and GPIO4's DEV_NOK interrupt via
> +  the interrupts property. GPIO3 (data-ready) is required internally
> +  regardless of board wiring and isn't exposed. GPIO1 (wake) gates
> +  whether the bootloader auto-loads its NVM contents after reset; it
> +  defaults to enabled with a weak pull-up, which already gives normal
> +  operation with no configuration needed, so it isn't exposed either.
> +
> +properties:
> +  compatible:
> +    enum:
> +      - adi,adis16607-2
> +      - adi,adis16607-3
> +
> +  reg:
> +    maxItems: 1
> +
> +  spi-cpha: true
> +
> +  spi-cpol: true
> +
> +  spi-max-frequency:
> +    maximum: 10000000
> +
> +  vdd-supply: true
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  clocks:
> +    description:
> +      Optional external clock for sync mode. If not provided, the internal
> +      8 kHz clock is used.
> +    maxItems: 1
> +
> +  reset-gpios:
> +    description:
> +      Optional GPIO for hardware reset, active low. Routes to the
> +      device's GPIO0 pin, which can be independently set to the reset
> +      function or left idle via an on-chip register.
> +    maxItems: 1
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +  - spi-cpha
> +  - spi-cpol
> +  - vdd-supply
> +
> +allOf:
> +  - $ref: /schemas/spi/spi-peripheral-props.yaml#
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +    #include <dt-bindings/gpio/gpio.h>
> +    spi {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        imu@0 {
> +            compatible = "adi,adis16607-2";
> +            reg = <0>;
> +            spi-cpha;
> +            spi-cpol;
> +            spi-max-frequency = <10000000>;
> +            vdd-supply = <&vdd>;
> +            interrupts = <4 IRQ_TYPE_LEVEL_HIGH>;
> +            interrupt-parent = <&gpio>;
> +            clocks = <&sync_clk>;
> +            reset-gpios = <&gpio 10 GPIO_ACTIVE_LOW>;
> +        };
> +    };
> diff --git a/MAINTAINERS b/MAINTAINERS
> index f53047aa8d3c..d5679e8d0ffd 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -1792,6 +1792,13 @@ S:	Supported
>  W:	https://ez.analog.com/linux-software-drivers
>  F:	Documentation/devicetree/bindings/iio/imu/adi,adis16550.yaml
>  
> +ANALOG DEVICES INC ADIS16607 DRIVER
> +M:	Radu Sabau <radu.sabau@analog.com>
> +L:	linux-iio@vger.kernel.org
> +S:	Supported
> +W:	https://ez.analog.com/linux-software-drivers
> +F:	Documentation/devicetree/bindings/iio/imu/adi,adis16607.yaml
> +
>  ANALOG DEVICES INC ADL8113 DRIVER
>  M:	Antoniu Miclaus <antoniu.miclaus@analog.com>
>  L:	linux-iio@vger.kernel.org
>