Hi Marek,
On Sat, Sep 7, 2019 at 6:16 PM <[email protected]> wrote:
> From: Marek Vasut <[email protected]>
>
> Add dma-ranges property into /soc node to describe the DMA capabilities
> of the bus. This is currently needed to translate PCI DMA ranges, which
> are limited to 32bit addresses.
>
> Signed-off-by: Marek Vasut <[email protected]>
> --- a/arch/arm64/boot/dts/renesas/r8a7795.dtsi
> +++ b/arch/arm64/boot/dts/renesas/r8a7795.dtsi
> @@ -330,6 +330,7 @@
> #address-cells = <2>;
> #size-cells = <2>;
> ranges;
> + dma-ranges = <0 0x40000000 0 0x40000000 0 0xc0000000>;
Shouldn't the length be 0x80000000 (for all SoCs)?
Or should we allow DMA to internal System RAM, too?
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- [email protected]
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
