RE: [PATCH] omap: Add macros to evaluate cpu revision

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Sanjeev,
> -----Original Message-----
> From: linux-omap-owner@xxxxxxxxxxxxxxx [mailto:linux-omap-
> owner@xxxxxxxxxxxxxxx] On Behalf Of Premi, Sanjeev
> Sent: Thursday, July 22, 2010 3:20 PM
> To: Menon, Nishanth; Gadiyar, Anand
> Cc: linux-omap@xxxxxxxxxxxxxxx
> Subject: RE: [PATCH] omap: Add macros to evaluate cpu revision
> 
> > -----Original Message-----
> > From: Menon, Nishanth
> > Sent: Thursday, July 22, 2010 3:08 PM
> > To: Gadiyar, Anand
> > Cc: Premi, Sanjeev; linux-omap@xxxxxxxxxxxxxxx
> > Subject: Re: [PATCH] omap: Add macros to evaluate cpu revision
> >
> > On 07/22/2010 01:53 AM, Gadiyar, Anand wrote:
> > >>> @@ -460,4 +461,35 @@ OMAP3_HAS_FEATURE(isp, ISP)
> > >>>   OMAP3_HAS_FEATURE(192mhz_clk, 192MHZ_CLK)
> > >>>   OMAP3_HAS_FEATURE(io_wakeup, IO_WAKEUP)
> > >>>
> > >>> +/*
> > >>> + * Map revision bits to silicon specific revisions
> > >>> + */
> > >>> +#define ES_1_0		OMAP_REVBITS_00
> > >> probably need ES_1_1, 1_2 (considering 3630)
> > >
> > >
> > > This should be okay, since the 3630 is out with
> > > these revisions, but...
> > >
> > >>> +#define ES_2_0		OMAP_REVBITS_10
> > >>> +#define ES_2_1		OMAP_REVBITS_20
> > >> makes sense to go to 2_2
> > >>> +#define ES_3_0		OMAP_REVBITS_30
> > >>> +#define ES_3_1		OMAP_REVBITS_40
> > >>> +#define ES_3_1_2	OMAP_REVBITS_50
> > >> 3_2?
> > >
> > > This may not make sense to add now as there are no
> > > 2.2 or 3.2 revisions of any OMAP3/4 silicon?
> > >
> > Agreed for 3 and 4, but considering this is
> > arch/arm/plat-omap/include/plat/cpu.h, does it make sense in
> > looking all
> > OMAPs?
> 
> In this case, the best option would be to prefix OMAP34X_/ OMAP36X_
> OMAP44X_ etc and define the ES revisions for each context.
> 
Can please put the usecase need here. Do you want to use this for
ERRATA handling or OPP handling etc etc ?

Regards,
Santosh
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