[U-Boot] [PATCH 07/11] pxa: start.S: enable SRAM clock

[Marek Vasut]

On 03/21/2016 02:37 AM, Vasily Khoruzhick wrote:
> SRAM is used for early stack, but kernel disables its clock on suspend.
> Re-enable SRAM clock on startup, otherwise u-boot crashes on resume from suspend.
> 
> Signed-off-by: Vasily Khoruzhick <anarsoul at gmail.com>
> ---
>  arch/arm/cpu/pxa/start.S | 10 +++++++++-
>  1 file changed, 9 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm/cpu/pxa/start.S b/arch/arm/cpu/pxa/start.S
> index 24b6ad1..ce1181a 100644
> --- a/arch/arm/cpu/pxa/start.S
> +++ b/arch/arm/cpu/pxa/start.S
> @@ -53,7 +53,15 @@ reset:
>  #ifdef	CONFIG_CPU_PXA25X
>  	bl	lock_cache_for_stack
>  #endif
> -
> +#ifdef	CONFIG_CPU_PXA27X
> +	/*
> +	 * enable clock for SRAM
> +	 */
> +	ldr	r0,=CKEN
> +	ldr	r1,[r0]
> +	orr	r1,r1,#(1 << 20)

Don't we have a macro for this 1 << 20 already ?

> +	str	r1,[r0]
> +#endif
>  	bl	_main
>  
>  /*------------------------------------------------------------------------------*/
> 


-- 
Best regards,
Marek Vasut