linux-kernel - Re: [PATCH v8 2/3] mfd: add Gateworks System Controller core driver

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Date:   Tue, 28 Apr 2020 12:21:17 -0700
From:   Tim Harvey <tharvey@...eworks.com>
To:     Lee Jones <lee.jones@...aro.org>
Cc:     Jean Delvare <jdelvare@...e.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Linux HWMON List <linux-hwmon@...r.kernel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        Device Tree Mailing List <devicetree@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        Robert Jones <rjones@...eworks.com>,
        Randy Dunlap <rdunlap@...radead.org>
Subject: Re: [PATCH v8 2/3] mfd: add Gateworks System Controller core driver

On Tue, Apr 28, 2020 at 2:44 AM Lee Jones <lee.jones@...aro.org> wrote:
>
<snip>
> > +
> > +static int gsc_probe(struct i2c_client *client)
> > +{
> > +     struct device *dev = &client->dev;
> > +     struct gsc_dev *gsc;
> > +     int ret;
> > +     unsigned int reg;
> > +
> > +     gsc = devm_kzalloc(dev, sizeof(*gsc), GFP_KERNEL);
> > +     if (!gsc)
> > +             return -ENOMEM;
> > +
> > +     gsc->dev = &client->dev;
> > +     gsc->i2c = client;
> > +     i2c_set_clientdata(client, gsc);
> > +
> > +     gsc->bus.reg_write = gsc_regmap_regwrite;
> > +     gsc->bus.reg_read = gsc_regmap_regread;
>
> Why do you need to store these in ddata?

Lee,

Thanks for the review!

I need the remap_bus* for devm_regmap_init() in the hwmon sub-module driver:

hwmon->regmap = devm_regmap_init(dev, &gsc->bus, gsc->i2c_hwmon,
&gsc_hwmon_regmap_config);

Is there something easier I'm missing?

Thanks,

Tim