Hi,
> Subject: RE: [PATCH v2] clocksource: Add BE APIs support for clocksource
> counter reading.
>
> On Sun, 28 Sep 2014, li.xi...@freescale.com wrote:
> > > Subject: Re: [PATCH v2] clocksource: Add BE APIs support for clocksource
> > > counter reading.
> > >
> > > On Fri, 26 Sep 2014, Xiubo Li wrote:
> > > > For now I just added _be() support using ioread{16,32}be.
> > > > And i have a check of the clocksource drivers, didn't find anyone
> > > > using LE mode on one BE SoC, so _le() APIs is not needed.
> > >
> > > Nonsense. The existing clocksource_mmio accessor function are
> > > providing LE access independent of the CPU endianess. So we don't need
> > > an _le() API simply because we have it already.
> > >
> > > > cycle_t clocksource_mmio_readl_up(struct clocksource *c)
> > > > {
> > > > - return (cycle_t)readl_relaxed(to_mmio_clksrc(c)->reg);
> > > > + return (cycle_t)ioread32(to_mmio_clksrc(c)->reg);
> > >
> > > And how exactly is this change related to adding BE support?
> > >
> >
> > Actually not very much, since the _be() APIs are using ioread{16,32}be(),
> > so I think using ioread{16,32}() will be less odd to having two different
> > accessors here.
> >
> > Wouldn't this be more unified somehow ?
>
> Changing existing code wants to be a separate patch with a proper
> changelog and a proper argument WHY it needs to be changed in the
> first place.
>
> So please provide that separate patch first with a VERY REASONABLE
> explanation in the changelog WHY the existing readl_relaxed() should
> be replaced by ioread32().
>
Okay, I will follow your advice.
Thanks,
BRs
Xiubo
> Thanks,
>
> tglx
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
