Re: [PATCH v1 1/2] clk: x86: lpss-atom: Use predefined constants from units.h

[Andy Shevchenko <andriy.shevchenko@linux.intel.com>]

On Tue, Aug 27, 2024 at 05:21:00PM -0700, Stephen Boyd wrote:
> Quoting Andy Shevchenko (2024-08-22 09:14:07)

...

> >  static int lpss_atom_clk_probe(struct platform_device *pdev)
> >  {
> >         struct lpss_clk_data *drvdata;
> >         struct clk *clk;
> > +       u32 rate;
> 
> Do we need a local variable?

Hmm... The idea was to allow retrieving this via device properties, that's why
a separate variable, but that patch wasn't included here.

Nevertheless, despite above the separate variable makes code a bit better to
read as we can see what is this value about.

> >         drvdata = devm_kzalloc(&pdev->dev, sizeof(*drvdata), GFP_KERNEL);
> >         if (!drvdata)
> >                 return -ENOMEM;
> >  
> > +       /* Default frequency is 100MHz */
> > +       rate = 100 * HZ_PER_MHZ;
> > +
> >         /* LPSS free running clock */
> >         drvdata->name = "lpss_clk";
> > -       clk = clk_register_fixed_rate(&pdev->dev, drvdata->name, NULL,
> > -                                     0, 100000000);
> > +       clk = clk_register_fixed_rate(&pdev->dev, drvdata->name, NULL, 0, rate);
> 
> This should be a one line patch.

I don't get this. You mean the entire thingy?

It's possible, but as I mentioned above there is a rationale for making it with
a temporary variable.

> >         if (IS_ERR(clk))
> >                 return PTR_ERR(clk);

-- 
With Best Regards,
Andy Shevchenko