Re: [PATCH v2 0/2] iio: light: vcnl4000: support shared IRQs

[Jonathan Cameron <jic23@kernel.org>]

On Mon, 17 Aug 2026 13:55:40 +0300
Andy Shevchenko <andriy.shevchenko@intel.com> wrote:

> On Fri, Aug 14, 2026 at 02:30:41PM +1000, Tsz Shan Chan wrote:
> > This series contains two changes for the vcnl4000 driver.
> > 
> > Patch 1 makes .num_channels match .channels for vcnl4200. vcnl4040 and
> > vcnl4000 channel arrays have the same size, so no functional change.
> > 
> > Patch 2 adds shared IRQ support. It changes the trigger type from
> > falling edge to low level and adds IRQF_SHARED. The IRQ handlers return
> > IRQ_NONE when the device did not generate the interrupt.  
> 
> LGTM,
> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
> 
See sashiko
https://sashiko.dev/#/patchset/20260814-vcnl4000-v2-0-9b771290cc1d%40jacques.com.au

It might be wrong and there isn't a race condition that ends you
with that condition of stuck level interrupt.  If so just reply here to explain why.

The one about even disabling is a common issue - the IIO core has
not explicit tracking of what events are enabled so it is up to the
driver to quiesce anything necessary on the path down. I didn't look closely
at these reports though so they may or may not be correct!

Thanks,

Jonathan