Re: [PATCH 3/4] regulators: irq_helper: Provide helper for trivial IRQ notifications

[Andy Shevchenko]

On Mon, Nov 22, 2021 at 01:04:12PM +0200, Matti Vaittinen wrote:
> Provide a generic map_event helper for regulators which have a notification
> IRQ with single, well defined purpose. Eg, IRQ always indicates exactly one
> event for exactly one regulator device. For such IRQs the mapping is
> trivial.

...

> +	int err = rid->states[0].possible_errs;

I would rather make it unsigned, but anyway...

> +	    !single_bit_set(err, sizeof(err) * 8)))

hweight32() seems suitable here.


-- 
With Best Regards,
Andy Shevchenko