On Thu, 2015-08-06 at 08:19 +0200, Sascha Hauer wrote:
> On Wed, Aug 05, 2015 at 06:47:03PM +0200, Matthias Brugger wrote:
> > On Tuesday, August 04, 2015 09:54:21 PM Scott Shu wrote:
> > > Add support for cpu enable-method "mediatek,mt6580-smp" for booting
> > > secondary CPUs on MT6580.
> > >
> > > Signed-off-by: Scott Shu <scott.shu@xxxxxxxxxxxx>
> > > ---
> > > arch/arm/mach-mediatek/platsmp.c | 137
> > > ++++++++++++++++++++++++++++++++++++++ 1 file changed, 137 insertions(+)
> > > +
> > > +static void __init mt6580_smp_prepare_cpus(unsigned int max_cpus)
> > > +{
> > > + static void __iomem *infracfg_ao_base;
> > > +
> > > + infracfg_ao_base = ioremap(MT6580_INFRACFG_AO, 0x1000);
> > > + if (!infracfg_ao_base) {
> > > + pr_err("%s: Unable to map I/O memory\n", __func__);
> > > + return;
> > > + }
> > > +
> > > + /* Enable bootrom power down mode */
> > > + writel_relaxed(readl(infracfg_ao_base + 0x804) | SW_ROM_PD,
> > > + infracfg_ao_base + 0x804);
> >
> > Please use a define for the offset.
> > I prefer to not cascade reads and writes but to use a temporary variable. But
> > if this is fine with the kernel coding style (I doubt, but I'm not sure) then
> > this is fine.
>
> For what it's worth I also prefer
>
> val = readl(infracfg_ao_base + 0x804);
> val |= SW_ROM_PD:
> writel_relaxed(val, infracfg_ao_base + 0x804);
>
> I find this better readable. I don't think though that there's common
> agreement that this style is better.
>
> Sascha
>
Fixed in next version. Thanks.
Scott
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