Re: [RFC PATCH] ASoC: ak4458: use reset control instead of reset gpio

[Mark Brown]

On Tue, Nov 17, 2020 at 06:17:36PM +0000, Viorel Suman wrote:
> > On Tue, Nov 17, 2020 at 12:20:36AM +0200, Viorel Suman (OSS) wrote:

> > One thing I'm not clear on is if there's some way to ensure that we don't have
> > different instances of the device resetting each other without them noticing?
> > Shouldn't be an issue in practice for the use here.

> The way to ensure that we don't have different instances of the device resetting each
> other is to rely on the way the "shared" reset is handled by reset API: 
> ==========
> +	ak4458->reset = devm_reset_control_get_optional_shared(ak4458->dev, NULL);
> +	if (IS_ERR(ak4458->reset))
> +		return PTR_ERR(ak4458->reset);
> ==========

Flip side of that then, how do we know when a reset has actually
happened?

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