On Mon, 27 May 2019 at 14:43, Neil Armstrong <[email protected]> wrote:
>
> On the Amlogic G12A SoC family, (only) the SDIO controller has a bug which
> makes any DRAM access from the MMC controller fail.
>
> Add the amlogic,dram-access-quirk property so signal this particular
> controller has this bug and needs a quirk to work properly.
>
> Reviewed-by: Martin Blumenstingl <[email protected]>
> Signed-off-by: Neil Armstrong <[email protected]>
Applied for next, thanks!
Kind regards
Uffe
> ---
> Documentation/devicetree/bindings/mmc/amlogic,meson-gx.txt | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/mmc/amlogic,meson-gx.txt
> b/Documentation/devicetree/bindings/mmc/amlogic,meson-gx.txt
> index 13e70409e8ac..ccc5358db131 100644
> --- a/Documentation/devicetree/bindings/mmc/amlogic,meson-gx.txt
> +++ b/Documentation/devicetree/bindings/mmc/amlogic,meson-gx.txt
> @@ -22,6 +22,10 @@ Required properties:
> clock rate requested by the MMC core.
> - resets : phandle of the internal reset line
>
> +Optional properties:
> +- amlogic,dram-access-quirk: set when controller's internal DMA engine
> cannot access the
> + DRAM memory, like on the G12A dedicated SDIO controller.
> +
> Example:
>
> sd_emmc_a: mmc@70000 {
> --
> 2.21.0
>
