[PATCH 3/5] ARM: EXYNOS5420: Add IO mapping for non-secure SYSRAM

[Dave Martin]

On Fri, Apr 11, 2014 at 11:31:49PM +0530, Abhilash Kesavan wrote:
> On the Exynos5420 non-secure SYSRAM is used for secondary CPU bring-up,
> so add a mapping for it.
> 
> Signed-off-by: Thomas Abraham <thomas.ab at samsung.com>
> Signed-off-by: Abhilash Kesavan <a.kesavan at samsung.com>
> ---
>  arch/arm/mach-exynos/exynos.c           |   11 +++++++++++
>  arch/arm/mach-exynos/include/mach/map.h |    1 +
>  2 files changed, 12 insertions(+)
> 
> diff --git a/arch/arm/mach-exynos/exynos.c b/arch/arm/mach-exynos/exynos.c
> index b32a907..b1cf9d5 100644
> --- a/arch/arm/mach-exynos/exynos.c
> +++ b/arch/arm/mach-exynos/exynos.c
> @@ -159,6 +159,15 @@ static struct map_desc exynos5250_iodesc[] __initdata = {
>  	},
>  };
>  
> +static struct map_desc exynos5420_iodesc[] __initdata = {
> +	{
> +		.virtual	= (unsigned long)S5P_VA_SYSRAM_NS,
> +		.pfn		= __phys_to_pfn(EXYNOS5420_PA_SYSRAM_NS),
> +		.length		= SZ_4K,
> +		.type		= MT_DEVICE,
> +	},
> +};
> +

Regarding Arnd's NAK in
http://lists.infradead.org/pipermail/linux-arm-kernel/2014-April/246936.html,
this looks like another instance of the same thing.

Arnd, what was your preferred solution?  Should this be described in DT?

Cheers
---Dave