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List:       linux-arm-kernel
Subject:    RE: Without MACH_ option Early printk (DEBUG_LL)
From:       Nicolas Pitre <nico () fluxnic ! net>
Date:       2012-08-31 18:23:32
Message-ID: alpine.LFD.2.02.1208311422450.1784 () xanadu ! home
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On Fri, 31 Aug 2012, Hiremath, Vaibhav wrote:

> On Fri, Aug 31, 2012 at 22:43:36, Russell King - ARM Linux wrote:
> > On Fri, Aug 31, 2012 at 08:24:51PM +0530, Vaibhav Hiremath wrote:
> > > Hi Russell & Tony,
> > > 
> > > AM335X EVM (based on AM33XX device) only supports DT boot mode and
> > > doesn't have CONFIG_MACH_AM335XEVM option defined. Some time back during
> > > baseport submission we had aligned that, we won't create separate EVM
> > > options, killing the board file all-together.
> > > 
> > > Having said that, the early printk option (DEBUG_LL) is broken, the
> > > auto-generated file "./include/generated/mach-types.h" still refers to
> > > CONFIG_MACH_AM335XEVM option,
> > > 
> > > #ifdef CONFIG_MACH_AM335XEVM
> > > # ifdef machine_arch_type
> > > #  undef machine_arch_type
> > > #  define machine_arch_type     __machine_arch_type
> > > # else
> > > #  define machine_arch_type     MACH_TYPE_AM335XEVM
> > > # endif
> > > # define machine_is_am335xevm() (machine_arch_type == MACH_TYPE_AM335XEVM)
> > > #else
> > > # define machine_is_am335xevm() (0)
> > > #endif
> > 
> > machine types are entirely meaningless for DT based systems.
> > 
> > > Can you comment on this? Based on that I will submit the patch.
> > 
> > Pointless.  You can't use machine_is_am335xevm() when you're using DT.
> > 
> 
> They how do you recommend to resolve early prink issue (required during 
> decompression)?

Right now the best you can do is to have empty stubs that display 
nothing.


Nicolas

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