[U-Boot] [PATCH v3 4/8] arm: bootm: call udc_disable() before booting linux

[Marek Vasut]

Dear Albert ARIBAUD,

> Hi Mike,
> 
> On Fri, 12 Apr 2013 11:59:16 -0700, Mike Dunn <mikedunn at newsguy.com>
> 
> wrote:
> > On the pxa270, if the udc device is not disabled before jumping to linux,
> > the device fails to initialize in linux because it was left in a running
> > state, and the linux driver assumes that it is in a disabled state.
> > 
> > Signed-off-by: Mike Dunn <mikedunn at newsguy.com>
> > ---
> > 
> > Changelog:
> >   v3: no change
> >   v2: no change
> > 
> > Arguably, this is a bug in the linux driver, but it seemed pretty simple
> > and benign to just disable it in u-boot.  I'll also send a patch to
> > upstream kernel to fix its driver.
> > 
> >  arch/arm/include/asm/bootm.h |    1 +
> >  arch/arm/lib/bootm.c         |    1 +
> >  2 files changed, 2 insertions(+), 0 deletions(-)
> > 
> > diff --git a/arch/arm/include/asm/bootm.h b/arch/arm/include/asm/bootm.h
> > index db2ff94..68189cc 100644
> > --- a/arch/arm/include/asm/bootm.h
> > +++ b/arch/arm/include/asm/bootm.h
> > @@ -21,6 +21,7 @@
> > 
> >  #ifdef CONFIG_USB_DEVICE
> >  extern void udc_disconnect(void);
> > 
> > +extern void udc_disable(void);
> > 
> >  #endif
> >  
> >  #endif
> > 
> > diff --git a/arch/arm/lib/bootm.c b/arch/arm/lib/bootm.c
> > index f3b30c5..6daa7bf 100644
> > --- a/arch/arm/lib/bootm.c
> > +++ b/arch/arm/lib/bootm.c
> > @@ -105,6 +105,7 @@ static void announce_and_cleanup(void)
> > 
> >  #ifdef CONFIG_USB_DEVICE
> >  
> >  	udc_disconnect();
> > 
> > +	udc_disable();
> > 
> >  #endif
> >  
> >  	cleanup_before_linux();
> >  
> >  }
> 
> Acked-By: Albert ARIBAUD <albert.u.boot at aribaud.net>

Tom, will this not break any of your musb-toys?

Best regards,
Marek Vasut