Re: [PATCH 3/6] net: stmmac: sun8i: Use devm_regulator_get for PHY regulator
From: Andrew Lunn
Date: Tue Aug 20 2019 - 11:57:57 EST
On Tue, Aug 20, 2019 at 05:47:14PM +0200, OndÅej Jirman wrote:
> Hi Andrew,
> On Tue, Aug 20, 2019 at 05:39:39PM +0200, Andrew Lunn wrote:
> > On Tue, Aug 20, 2019 at 04:53:40PM +0200, megous@xxxxxxxxxx wrote:
> > > From: Ondrej Jirman <megous@xxxxxxxxxx>
> > >
> > > Use devm_regulator_get instead of devm_regulator_get_optional and rely
> > > on dummy supply. This avoids NULL checks before regulator_enable/disable
> > > calls.
> > Hi Ondrej
> > What do you mean by a dummy supply? I'm just trying to make sure you
> > are not breaking backwards compatibility.
> Sorry, I mean dummy regulator. See:
> On systems that use DT (i.e. have_full_constraints() == true), when the
> regulator is not found (ENODEV, not specified in DT), regulator_get will return
> a fake dummy regulator that can be enabled/disabled, but doesn't do anything
But we also gain a new warning:
"%s supply %s not found, using dummy regulator\n",
This regulator is clearly optional, so there should not be a warning.
Maybe you can add a new get_type, OPTIONAL_GET, which does not issue
the warning, but does give back a dummy regulator.