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

Rob Herring
2014-01-16T14:36:46Z

On Wed, Jan 15, 2014 at 3:40 PM, Heiko Stübner <heiko@sntech.de> 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@gmail.com>
> Signed-off-by: Heiko Stuebner <heiko@sntech.de>
> Tested-by: Ulrich Prinz <ulrich.prinz@googlemail.com>

Acked-by: Rob Herring <robh@kernel.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 , , ...; 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
>
>