linux-kernel - Re: [PATCH v3 2/3] regulator: add support for SY8106A regulator

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Message-ID: <20180425105309.GC24769@sirena.org.uk>
Date:   Wed, 25 Apr 2018 11:53:09 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Icenowy Zheng <icenowy@...c.io>
Cc:     linux-arm-kernel@...ts.infradead.org,
        Ondrej Jirman <megous@...ous.com>, devicetree@...r.kernel.org,
        Maxime Ripard <maxime.ripard@...tlin.com>,
        linux-sunxi@...glegroups.com, Liam Girdwood <lgirdwood@...il.com>,
        linux-kernel@...r.kernel.org, Chen-Yu Tsai <wens@...e.org>,
        Rob Herring <robh+dt@...nel.org>
Subject: Re: [PATCH v3 2/3] regulator: add support for SY8106A regulator

On Wed, Apr 25, 2018 at 07:41:35AM +0800, Icenowy Zheng wrote:
> 于 2018年4月25日 GMT+08:00 上午1:07:33, Mark Brown <broonie@...nel.org> 写到:
> >On Mon, Apr 23, 2018 at 10:46:56PM +0800, Icenowy Zheng wrote:

> >> --- /dev/null
> >> +++ b/drivers/regulator/sy8106a-regulator.c
> >> @@ -0,0 +1,176 @@
> >> +// SPDX-License-Identifier: GPL-2.0+
> >> +/*
> >> + * sy8106a-regulator.c - Regulator device driver for SY8106A

> >Just make the entire thing a C++ comment so it looks consistent and
> >joined up.

> SPDX identifier is special -- it should be in a seperated
> comment block.

No, it just needs to be a C++ comment on the first line to ease machine
parsing.  The rest of the file doesn't matter for that.

> >> +	if (reg & SY8106A_GO_BIT)
> >> +		return reg & rdev->desc->vsel_mask;
> >> +	else
> >> +		return (chip->fixed_voltage - rdev->desc->min_uV) /
> >> +		       rdev->desc->uV_step;

> >You could use the standard get_voltage_sel() if you provide a mapping
> >operation that set everything with _GO_BIT set to return the fixed
> >voltage.  Though looking at this it seems that the fixed voltage will
> >always be one that could be set via the register anyway so I'm
> >wondering
> >if the easiest thing here isn't to just have the driver turn off
> >_GO_BIT

> Do you mean "turn on" here?

Yes.

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