On Fri, Mar 20, 2015 at 07:52:46PM +0100, Hans de Goede wrote:
> The A10 has a few SRAM that can be mapped either to a device or to the CPU,
> with the mapping being controlled by a SRAM controller.
>
> Since most of the time these SRAM won't be accessible by the CPU,
> we can't use the mmio-sram driver and compatible.
>
> Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
> ---
> arch/arm/boot/dts/sun4i-a10.dtsi | 34 ++++++++++++++++++++++++++++++++++
> 1 file changed, 34 insertions(+)
>
> diff --git a/arch/arm/boot/dts/sun4i-a10.dtsi b/arch/arm/boot/dts/sun4i-a10.dtsi
> index b66ebb3..88f57b4 100644
> --- a/arch/arm/boot/dts/sun4i-a10.dtsi
> +++ b/arch/arm/boot/dts/sun4i-a10.dtsi
> @@ -451,12 +451,46 @@
> };
> };
>
> + /*
> + * Note we use the address were mmio registers start, not where the
^ where
> + * SRAM blocks start, this cannot be changed because that would be
> + * a devicetree ABI change.
> + */
> soc@01c00000 {
> compatible = "simple-bus";
> #address-cells = <1>;
> #size-cells = <1>;
> ranges;
>
> + sram@00000000 {
> + compatible = "allwinner,sun4i-a10-sram";
> + reg = <0x00000000 0x4000>;
> + allwinner,sram-name = "A1";
> + };
> +
> + sram@00004000 {
> + compatible = "allwinner,sun4i-a10-sram";
> + reg = <0x00004000 0x4000>;
> + allwinner,sram-name = "A2";
> + };
> +
> + sram@00008000 {
> + compatible = "allwinner,sun4i-a10-sram";
> + reg = <0x00008000 0x4000>;
> + allwinner,sram-name = "A3-A4";
> + };
> +
> + sram@00010000 {
> + compatible = "allwinner,sun4i-a10-sram";
> + reg = <0x00010000 0x1000>;
> + allwinner,sram-name = "D";
> + };
> +
> + sram-controller@01c00000 {
> + compatible = "allwinner,sun4i-a10-sram-controller";
> + reg = <0x01c00000 0x30>;
> + };
> +
> dma: dma-controller@01c02000 {
> compatible = "allwinner,sun4i-a10-dma";
> reg = <0x01c02000 0x1000>;
> --
> 2.3.3
>
--
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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