linux-kernel - Re: [PATCH v5] regulator: da9063: Add support for full-current mode.

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Date:   Mon, 12 Jul 2021 13:56:49 +0000
From:   Vincent Pelletier <plr.vincent@...il.com>
To:     Adam Thomson <Adam.Thomson.Opensource@...semi.com>
Cc:     Support Opensource <Support.Opensource@...semi.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v5] regulator: da9063: Add support for full-current
 mode.

Hello,

Thanks for the review.

On Mon, 12 Jul 2021 10:42:26 +0000, Adam Thomson <Adam.Thomson.Opensource@...semi.com> wrote:
> On 08 July 2021 11:33, Vincent Pelletier wrote:
> > +	if (ret < 0)
> > +		/* attempt to restore original overdrive state, ignore failure-
> > +		 * on-failure
> > +		 */
> > +		regmap_update_bits(regl->hw->regmap,
> > DA9063_REG_CONFIG_H,
> > +				   overdrive_mask, orig_overdrive);  
> 
> If I2C is failing here I'm not sure this is going to go through and you have
> bigger problems. Not sure if it's really worth trying to roll-back at this point
> but maybe Mark has another view. Personally I'd be tempted to just ditch this
> and just always set the OD bit in this function, rather than trying an roll-back.
> Will be much simpler code.

What I have in mind here is regulator_set_current_limit_regmap
rejecting the change not because of a bus issue, but rather because of
an unusable min_uA..max_uA range.
I add this to the error handling path comment to make the intent
clearer.

But your remark indeed fully applies in the case of
da9063_buck_set_limit_clear_overdrive. I will keep the roll-back
codepath for the next patch iteration, but I will drop it if the
consensus is against its presence.

Regards,
-- 
Vincent Pelletier
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