RE: [PATCH 2/3] AM35xx: Introduce am35xx.h file

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> -----Original Message-----
> From: Kevin Hilman [mailto:khilman@xxxxxxxxxxxxxxxxxxx]
> Sent: Friday, January 08, 2010 12:44 AM
> To: Hiremath, Vaibhav
> Cc: linux-omap@xxxxxxxxxxxxxxx; tony@xxxxxxxxxxx; Govindarajan,
> Sriramakrishnan
> Subject: Re: [PATCH 2/3] AM35xx: Introduce am35xx.h file
> 
> "Hiremath, Vaibhav" <hvaibhav@xxxxxx> writes:
> 
> >> -----Original Message-----
> >> From: Kevin Hilman [mailto:khilman@xxxxxxxxxxxxxxxxxxx]
> >> Sent: Thursday, January 07, 2010 5:20 AM
> >> To: Hiremath, Vaibhav
> >> Cc: linux-omap@xxxxxxxxxxxxxxx; tony@xxxxxxxxxxx; Govindarajan,
> >> Sriramakrishnan
> >> Subject: Re: [PATCH 2/3] AM35xx: Introduce am35xx.h file
> >>
> >> hvaibhav@xxxxxx writes:
> >>
> >> > From: Vaibhav Hiremath <hvaibhav@xxxxxx>
> >> >
> >> > Add base address definations for new AM35xx IPSS modules, like
> >> > VPFE, USBOTG, CPGMAC.
> >> >
> >> > Signed-off-by: Vaibhav Hiremath <hvaibhav@xxxxxx>
> >> > Signed-off-by: Sriramakrishnan <srk@xxxxxx>
> >> > ---
> >> >  arch/arm/plat-omap/include/plat/am35xx.h   |   25
> >> +++++++++++++++++++++++++
> >> >  arch/arm/plat-omap/include/plat/hardware.h |    1 +
> >> >  2 files changed, 26 insertions(+), 0 deletions(-)
> >> >  create mode 100644 arch/arm/plat-omap/include/plat/am35xx.h
> >> >
> >> > diff --git a/arch/arm/plat-omap/include/plat/am35xx.h
> >> b/arch/arm/plat-omap/include/plat/am35xx.h
> >> > new file mode 100644
> >> > index 0000000..d41bd61
> >> > --- /dev/null
> >> > +++ b/arch/arm/plat-omap/include/plat/am35xx.h
> >> > @@ -0,0 +1,25 @@
> >> > +/*:
> >> > + * Address mappings and base address for AM35XX specific
> >> interconnects
> >> > + * and peripherals.
> >> > + *
> >> > + * Copyright (C) 2009 Texas Instruments
> >> > + *
> >> > + * Author: Sriramakrishnan <srk@xxxxxx>
> >> > + *	   Vaibhav Hiremath <hvaibhav@xxxxxx>
> >> > + *
> >> > + * This program is free software; you can redistribute it
> and/or
> >> modify
> >> > + * it under the terms of the GNU General Public License
> version 2
> >> as
> >> > + * published by the Free Software Foundation.
> >> > + */
> >> > +#ifndef __ASM_ARCH_AM35XX_H
> >> > +#define __ASM_ARCH_AM35XX_H
> >> > +
> >> > +/*
> >> > + * Base addresses
> >> > + */
> >> > +#define AM35XX_IPSS_EMAC_BASE		0x5C000000
> >> > +#define AM35XX_IPSS_USBOTGSS_BASE	0x5C040000
> >> > +#define AM35XX_IPSS_HECC_BASE		0x5C050000
> >> > +#define AM35XX_IPSS_VPFE_BASE		0x5C060000
> >>
> >> I think this secont needs ome more comments.  In the 34xx TRM
> memory
> >> map, this region is shown as IVA2, so folks familiar with 34xx
> might
> >> be confused.
> >>
> > [Hiremath, Vaibhav] I will update the comment with sufficient
> info.
> >
> >> That being said, is there any reason to have these in a global
> >> header
> >> file?  Nobody should use these except SoC/board init code, so
> these
> >> should probably stay in arch/arm/mach-omap2 in AM35x specific
> code.
> >>
> > [Hiremath, Vaibhav] Agreed, but there are some occurrences where
> these macros may required to use in plat-omap/ directory. Just for
> an example -
> >
> > Macro OMAP443X_SCM_BASE, defined in
> > arch/arm/plat-omap/include/plat/omap44xx.h file is getting used in
> > arch/arm/plat-omap/common.c file.
> 
> OK, but SCM_BASE has nothing to do with the base addresses you're
> adding in this patch.
> 
> My point is that I don't see a need for the values in this patch to
> be
> defined in a global header.
> 
[Hiremath, Vaibhav] I was just trying to mention that we might required to maintain global macros in platxxx.h files. I completely agree with you that's, in case of AM35x we don't require to make them global.

I will update the patch and post it again.

Thanks,
Vaibhav

> Kevin
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