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

[Albert ARIBAUD <albert.u.boot@aribaud.net>]

Hi Mike,

On Fri, 12 Apr 2013 11:59:16 -0700, Mike Dunn <mikedunn@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@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@aribaud.net>

Amicalement,
-- 
Albert.