Re: [PATCH v12 5/6] hwmon: add NXP MC33978/MC34978 driver

[Krzysztof Kozlowski <krzk@kernel.org>]

On 15/05/2026 20:38, sashiko-bot@kernel.org wrote:
>> Add hardware monitoring support for the NXP MC33978/MC34978 Multiple
>> Switch Detection Interface (MSDI).
>>
>> The hardware utilizes a clear-on-read FAULT register, but physical
>> faults remain asserted as long as the underlying condition exists. This
>> asserts a global FAULT_STAT bit on the SPI bus. To handle this without
>> trapping the CPU in an interrupt storm, this driver implements the
>> following architecture:
>> - Requests a rising-edge nested IRQ (IRQF_TRIGGER_RISING) from the MFD
>>   core to catch the initial 0 -> 1 transition of the global fault state.
>> - Caches hwmon-specific alarm bits and calculates state edges (XOR) to
>>   isolate alarm transitions from system integrity faults.
>> - Implements a 1Hz delayed workqueue that polls the hardware as long as
>>   any alarm is active. This compensates for the edge-triggered IRQ by
>>   discovering secondary faults that occur without a rising edge, and
>>   detecting when the hardware clears.
>>
>> Assisted-by: Gemini:gemini-3.1-pro Sashiko
>> Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
> 
> Reviewed-by: Sashiko <sashiko-bot@kernel.org>


NAK, fake tag.

https://lore.kernel.org/linux-devicetree/ad139e54-a7f0-4d09-832c-6b2bf2e93e03@kernel.org/T/#u


Best regards,
Krzysztof