[PATCH v6 1/5] i2c: designware: Use polling by default when there is no irq resource

[Andy Shevchenko]

On Tue, Jul 01, 2025 at 03:22:48PM +0300, Heikki Krogerus wrote:
> The irq resource itself can be used as a generic way to
> determine when polling is needed.
> 
> This not only removes the need for special additional device
> properties that would soon be needed when the platform may
> or may not have the irq, but it also removes the need to
> check the platform in the first place in order to determine
> is polling needed or not.

> Signed-off-by: Heikki Krogerus <heikki.krogerus at linux.intel.com>
> ---
> Hi guys,
> 
> I found the thread with Jarkko's comments from my archives. He wanted
> the local flags variable to be added because he wants the order of the
> calls to remain as it is now - the device is allocated only after the
> irq is checked.

Yes, thanks.

...

> +	u32 flags = (uintptr_t)device_get_match_data(&pdev->dev);

> +	irq = platform_get_irq_optional(pdev, 0);
> +	if (irq == -ENXIO)
> +		flags |= ACCESS_POLLING;
> +	else if (irq < 0)
>  		return irq;

>  	if (device_property_present(device, "wx,i2c-snps-model"))
> +		flags = MODEL_WANGXUN_SP | ACCESS_POLLING;

Now I'm a bit puzzled why do we need to add this flag explicitly here?
Does Wnagxun provides an IRQ and chooses at the same time to poll?
Shouldn't this patch rather fix that?

-- 
With Best Regards,
Andy Shevchenko