linux-kernel - RE: [PATCH V4 3/4] ARM: Xilinx: base header files and assembly macros

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Date:	Sun, 20 Feb 2011 17:18:14 -0700
From:	John Linn <John.Linn@...inx.com>
To:	Arnd Bergmann <arnd@...db.de>
CC:	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, <linux@....linux.org.uk>,
	<catalin.marinas@....com>, <glikely@...retlab.ca>,
	<jamie@...ieiles.com>
Subject: RE: [PATCH V4 3/4] ARM: Xilinx: base header files and assembly macros

> -----Original Message-----
> From: Arnd Bergmann [mailto:arnd@...db.de]
> Sent: Sunday, February 20, 2011 2:38 PM
> To: John Linn
> Cc: linux-arm-kernel@...ts.infradead.org;
linux-kernel@...r.kernel.org;
> linux@....linux.org.uk; catalin.marinas@....com; glikely@...retlab.ca;
> jamie@...ieiles.com
> Subject: Re: [PATCH V4 3/4] ARM: Xilinx: base header files and
assembly
> macros
> 
> On Friday 18 February 2011, John Linn wrote:
> > +
> > +/* IO address mapping macros, nothing special at this time but
> required */
> > +
> > +#ifdef __ASSEMBLER__
> > +#define IOMEM(x)               (x)
> > +#else
> > +#define IOMEM(x)               ((void __force __iomem *)(x))
> > +#endif
> > +
> > +#define __io(a)                        __typesafe_io(a)
> > +#define __mem_pci(a)           (a)
> 
> Are you planning to support PCI or PCMCIA? If so, the __io definition
> will have to
> change so it points to the PIO register window.

No immediate plans for PCI or PCMCIA.  Makes sense.

> 
> > diff --git a/arch/arm/mach-xilinx/include/mach/timex.h
> b/arch/arm/mach-xilinx/include/mach/timex.h
> > new file mode 100644
> > index 0000000..4ebc0a6
> > --- /dev/null
> > +++ b/arch/arm/mach-xilinx/include/mach/timex.h
> > +#ifndef __MACH_TIMEX_H__
> > +#define __MACH_TIMEX_H__
> > +
> > +#define PERIPHERAL_CLOCK_RATE  2500000
> > +
> > +#define CLOCK_TICK_RATE        (PERIPHERAL_CLOCK_RATE / 32)
> > +
> > +#endif
> 
> I thought we were at the point where CLOCK_TICK_RATE is no longer
used.

The timer code in these patches is using it, no other comments on it so
far.

> Did the patches not make it in yet?
> 

I haven't heard they made them in yet, just waiting and hoping for an
ack.

> The rest looks fine to me.

Great, appreciate the review and your time.

-- John

> 
> 	Arnd


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