Re: [PATCH 2/2] dt-bindings: wireless: ath: Deprecate 'qcom,calibration-variant' property

[Krzysztof Kozlowski <krzk@kernel.org>]

On 14/11/2025 11:22, Manivannan Sadhasivam wrote:
> On devicetree platforms, ath{10k/11k} drivers rely on the presence of the
> 'qcom,calibration-variant' property to select the correct calibration data
> for device variants with colliding IDs.
> 
> But this property based selection has its own downside that it needs to be
> added to the devicetree node of the WLAN device, especially for PCI based
> devices. Currently, the users/vendors are forced to hardcode this property
> in the PCI device node. If a different device need to be attached to the
> slot, then the devicetree node also has to be changed. This approach is not
> scalable and creates a bad user experience.
> 
> So deprecate this property from WLAN devicetree nodes and let the drivers
> do the devicetree model based calibration variant lookup using a static
> table.
> 
> This also warrants removing the property from examples in the binding.
> 
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>
> ---

The problem - visible in one of the examples here - is that one board
has multiple WiFi chips and they use different calibration-variant
properties. How do you find the right calibration variant for such case
based on board machine match?

Best regards,
Krzysztof