dt-bindings: net: wireless: wfx: discourage OOB IRQ with SDIO

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The WFxxx device provides an SDIO interface. In addition to the usual
in-band SDIO IRQ, the device also supports an out-of-band IRQ line.

However, using the OOB IRQ with SDIO requires to poll the control
register during the device initialization. This polling is unreliable:
if an IRQ is raised while the host reads the control register, the
device is lost and only a reset allows to recover it.

There is no way to fix this in software. So, warn the user that this
setup should be reserved to debug.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Link: https://patch.msgid.link/20260901083548.113131-3-jerome.pouiller@silabs.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

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Jérôme Pouiller 2026-09-01 10:33:20 +02:00 • committed by Johannes Berg

parent 102f54dc47

commit d8c297ec6b

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Documentation/devicetree/bindings/net/wireless/silabs,wfx.yaml

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