linux-kernel - Re: [RFC PATCH v4 2/5] mfd: add driver for Marvell 88PM886 PMIC

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Message-Id: <CZZLDK79D5VK.2VK3X59OHIY2Z@matfyz.cz>
Date: Thu, 21 Mar 2024 18:08:16 +0100
From: "Karel Balej" <balejk@...fyz.cz>
To: "Mark Brown" <broonie@...nel.org>
Cc: "Lee Jones" <lee@...nel.org>, "Rob Herring" <robh+dt@...nel.org>,
        "Krzysztof Kozlowski" <krzysztof.kozlowski+dt@...aro.org>,
        "Conor Dooley"
 <conor+dt@...nel.org>,
        "Dmitry Torokhov" <dmitry.torokhov@...il.com>,
        "Liam
 Girdwood" <lgirdwood@...il.com>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-input@...r.kernel.org>,
        Duje Mihanović <duje.mihanovic@...le.hr>,
        <~postmarketos/upstreaming@...ts.sr.ht>, <phone-devel@...r.kernel.org>
Subject: Re: [RFC PATCH v4 2/5] mfd: add driver for Marvell 88PM886 PMIC

Mark Brown, 2024-03-21T16:58:44+00:00:
> On Thu, Mar 21, 2024 at 05:55:17PM +0100, Karel Balej wrote:
> > Lee Jones, 2024-03-21T16:20:45+00:00:
> > > On Thu, 21 Mar 2024, Karel Balej wrote:
>
> > > > > > +static const struct regmap_config pm886_i2c_regmap = {
> > > > > > +	.reg_bits = 8,
> > > > > > +	.val_bits = 8,
> > > > > > +	.max_register = PM886_REGMAP_CONF_MAX_REG,
> > > > > > +};
>
> > > > > Why is this in here?
>
> > > > Because since I moved the regulators regmap initialization into the
> > > > regulators driver, I need to access it from there.
>
> > > So move it into the regulators driver?
>
> > It is used in the MFD driver too for the base regmap.
>
> You shouldn't be creating two regmaps for the same set of registers,
> that just opens the potential for confusion.

Just the regmap config is the same. Otherwise, each regmap lives at a
different I2C address.

Regards,
K. B.