linux-kernel - Re: [PATCH v5 09/16] regulator: bd71828: Basic support for ROHM bd71828 PMIC regulators

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Date:   Tue, 19 Nov 2019 09:12:06 +0000
From:   "Vaittinen, Matti" <Matti.Vaittinen@...rohmeurope.com>
To:     "broonie@...nel.org" <broonie@...nel.org>
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Subject: Re: [PATCH v5 09/16] regulator: bd71828: Basic support for ROHM
 bd71828 PMIC regulators

Thanks Mark,

On Mon, 2019-11-18 at 16:20 +0000, Mark Brown wrote:
> On Mon, Nov 18, 2019 at 08:57:57AM +0200, Matti Vaittinen wrote:
> 
> > +static int ramp_delay_supported(struct regulator_dev *rdev)
> > +{
> > +	switch (rdev->desc->id) {
> > +	case BD71828_BUCK1:
> > +	case BD71828_BUCK2:
> > +	case BD71828_BUCK6:
> > +	case BD71828_BUCK7:
> > +		return 1;
> > +	default:
> > +		break;
> > +	}
> > +	return 0;
> > +}
> > +
> > +static int bd71828_set_ramp_delay(struct regulator_dev *rdev, int
> > ramp_delay)
> > +{
> > +	unsigned int val;
> > +
> > +	if (!ramp_delay_supported(rdev)) {
> > +		dev_err(&rdev->dev, "%s: can't set ramp-delay\n",
> > +			rdev->desc->name);
> > +		return -EINVAL;
> 
> Rather than doing this it's better to just not provide the operation
> for
> devices that don't support it, that makes the handling in the core
> easier.

Makes sense. I'll change this in next version.

Br,
	Matti Vaittinen