Re: [PATCH v6 1/6] dt-bindings: sram: describe option to reserve parts of the memory

[Rob Herring <robherring2-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

On Wed, Jan 15, 2014 at 3:40 PM, Heiko Stübner <heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org> wrote:
> Some SoCs need parts of their sram for special purposes. So while being part
> of the peripheral, it should not be part of the genpool controlling the sram.
>
> Therefore add an option mmio-sram-reserved to keep arbitrary portions of the
> sram from general usage.
>
> Suggested-by: Rob Herring <robherring2-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> Signed-off-by: Heiko Stuebner <heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org>
> Tested-by: Ulrich Prinz <ulrich.prinz-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>

Acked-by: Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>

> ---
>  Documentation/devicetree/bindings/misc/sram.txt |    8 ++++++++
>  1 file changed, 8 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/misc/sram.txt b/Documentation/devicetree/bindings/misc/sram.txt
> index 4d0a00e..09ee7a3 100644
> --- a/Documentation/devicetree/bindings/misc/sram.txt
> +++ b/Documentation/devicetree/bindings/misc/sram.txt
> @@ -8,9 +8,17 @@ Required properties:
>
>  - reg : SRAM iomem address range
>
> +Optional properties:
> +
> +- mmio-sram-reserved: ordered list of reserved chunks inside the sram that
> +  should not be used by the operating system.
> +  Format is <base size>, <base size>, ...; with base being relative to the
> +  reg property base.
> +
>  Example:
>
>  sram: sram@5c000000 {
>         compatible = "mmio-sram";
>         reg = <0x5c000000 0x40000>; /* 256 KiB SRAM at address 0x5c000000 */
> +       mmio-sram-reserved = <0x0 0x100>; /* reserve 0x5c000000-0x5c000100 */
>  };
> --
> 1.7.10.4
>
>
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