linux-kernel - Re: [PATCH v5 7/8] clk: lochnagar: Add support for the Cirrus Logic Lochnagar

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Message-ID: <154542507738.13075.5210584076841559233@swboyd.mtv.corp.google.com>
Date:   Fri, 21 Dec 2018 12:44:37 -0800
From:   Stephen Boyd <sboyd@...nel.org>
To:     Charles Keepax <ckeepax@...nsource.cirrus.com>
Cc:     broonie@...nel.org, lee.jones@...aro.org, linus.walleij@...aro.org,
        mturquette@...libre.com, robh+dt@...nel.org, mark.rutland@....com,
        lgirdwood@...il.com, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, patches@...nsource.cirrus.com,
        linux-clk@...r.kernel.org, linux-gpio@...r.kernel.org
Subject: Re: [PATCH v5 7/8] clk: lochnagar: Add support for the Cirrus Logic Lochnagar

Quoting Charles Keepax (2018-12-21 05:50:37)
> On Thu, Nov 29, 2018 at 11:53:51PM -0800, Stephen Boyd wrote:
> > Quoting Charles Keepax (2018-11-20 06:16:30)
> 
> > > +               break;
> > > +       default:
> > > +               dev_err(priv->dev, "Unknown Lochnagar type: %d\n", priv->type);
> > > +               return -EINVAL;
> > > +       }
> > > +
> > > +       if (!priv->parents)
> > > +               return -ENOMEM;
> > > +
> > > +       for (i = 0; i < priv->nparents; i++) {
> > > +               j = of_property_match_string(np, "clock-names",
> > > +                                            priv->parents[i]);
> > > +               if (j >= 0)
> > > +                       priv->parents[i] = of_clk_get_parent_name(np, j);
> > 
> > Isn't this of_clk_parent_fill()? But there are holes or something?
> > 
> 
> I guess rather than a fill, this is perhaps more of a name and
> replace. I could make this a core function if you prefer? I think
> there are a couple of other drivers that could also use it,
> although might be worth doing that as a separate series rather
> than holding this one up.

No worries. I'm actively changing the parent_names design anyway so this
is fine.

> 
> 
> > > +static struct platform_driver lochnagar_clk_driver = {
> > > +       .driver = {
> > > +               .name = "lochnagar-clk",
> > > +               .of_match_table = of_match_ptr(lochnagar_of_match),
> > 
> > I suspect of_match_ptr() makes the build complain about unused match
> > table when CONFIG_OF=N. Can you try building it that way?
> > 
> 
> The driver depends on the MFD which in turn depends on CONFIG_OF
> so that shouldn't be a problem.

Ok. Then it's really not needed and it's better to drop the usage of
of_match_ptr() then.

>