Re: [PATCH 1/3] dt-bindings: iio: adc: adi,ad7124: Allow specifications of a gpio for irq line

[Rob Herring <robh@kernel.org>]

On Thu, Oct 24, 2024 at 07:17:03PM +0200, Uwe Kleine-König wrote:
> For the AD7124 chip the logical irq line (̅R̅D̅Y) is physically on the same
> pin as the spi MISO output (DOUT) and so reading a register might
> trigger an interrupt. For correct operation it's critical that the
> actual state of the pin can be read to judge if an interrupt event is a
> real one or just a spurious one triggered by toggling the line in its
> MISO mode.
> 
> Allow specification of an "interrupt-gpios" property instead of a plain
> interrupt. The semantic is that the GPIO's interrupt is to be used as
> event source and reading the GPIO can be used to differentiate between a
> real event and one triggered by MISO.
> 
> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
> ---
>  .../devicetree/bindings/iio/adc/adi,ad7124.yaml     | 13 ++++++++++---
>  1 file changed, 10 insertions(+), 3 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7124.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad7124.yaml
> index 35ed04350e28..feb3a41a148e 100644
> --- a/Documentation/devicetree/bindings/iio/adc/adi,ad7124.yaml
> +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7124.yaml
> @@ -37,6 +37,9 @@ properties:
>      description: IRQ line for the ADC
>      maxItems: 1
>  
> +  interrupt-gpios:

Name it for the pin/signal, not how you are going to use it: rdy-gpios

Rob