[U-Boot] [PATCH] ARM: MX5: Fix broken leftover TO-2 errata workaround

[David Jander]

On Thu, 14 Jul 2011 14:14:52 +0200
Stefano Babic <sbabic at denx.de> wrote:

> On 07/14/2011 01:56 PM, David Jander wrote:
> > This check was broken. r3 does not contain the silicon revision anymore, so
> > we need to reload it.
> > 
> > Signed-off-by: David Jander <david at protonic.nl>
> > ---
> 
> Hi David,
> 
> >  arch/arm/cpu/armv7/mx5/lowlevel_init.S |    4 +++-
> >  1 files changed, 3 insertions(+), 1 deletions(-)
> > 
> > diff --git a/arch/arm/cpu/armv7/mx5/lowlevel_init.S
> > b/arch/arm/cpu/armv7/mx5/lowlevel_init.S index ee4150d..6bb398f 100644
> > --- a/arch/arm/cpu/armv7/mx5/lowlevel_init.S
> > +++ b/arch/arm/cpu/armv7/mx5/lowlevel_init.S
> > @@ -39,7 +39,9 @@
> >  	orr r0, r0, #(1 << 23)		/* disable write allocate
> > combine */ orr r0, r0, #(1 << 22)		/* disable write allocate
> > */ 
> > -	cmp r3, #0x10    /* r3 contains the silicon rev */
> > +	ldr r1, =0x0
> > +	ldr r3, [r1, #ROM_SI_REV]
> > +	cmp r3, #0x10
> 
> You have to protect the code related to TO2 with CONFIG_MX51. As I can
> see, the macro is called for MX.53, too, and the test produces wrong
> results.

Wow, you are right! So this code was actually broken in more ways than I
initially thought :-)
Ok, will fix it (again).
Btw, may I congratulate you for your good work in improving u-boot code
quality? It is starting to get to a level only known from LKML ;-)
Clearly the code was not reviewed as well when this was initially submitted.

Best regards,

-- 
David Jander
Protonic Holland.