linux-kernel - Re: [PATCHv2 12/13] regulator: rk808: add rk806 support

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Message-ID: <YxnSpE7/oNti9KKK@sirena.org.uk>
Date:   Thu, 8 Sep 2022 12:31:48 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Matti Vaittinen <mazziesaccount@...il.com>
Cc:     Sebastian Reichel <sebastian.reichel@...labora.com>,
        Heiko Stuebner <heiko@...ech.de>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Lee Jones <lee@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Alessandro Zummo <a.zummo@...ertech.it>,
        linux-rockchip@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, kernel@...labora.com,
        shengfei Xu <xsf@...k-chips.com>
Subject: Re: [PATCHv2 12/13] regulator: rk808: add rk806 support

On Thu, Sep 08, 2022 at 10:45:40AM +0300, Matti Vaittinen wrote:
> On 9/8/22 03:31, Sebastian Reichel wrote:

> > +static int rk806_set_voltage(struct regulator_dev *rdev,
> > +			     int req_min_uV, int req_max_uV,
> > +			     unsigned int *selector)

> Hmm. Maybe this is not necessary? I wonder if we could get away just with
> the .map and .set_voltage_sel (regulator_get_voltage_sel_regmap() and
> regulator_map_voltage_linear_range()).

Not just can, should.  Drivers should not mix and match voltage based
and selector based operations, and they should always try to implement
selector based operations unless there's a specific reason to do
otherwise.

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