diff mbox series

[v2,1/3] dt-bindings: mmc: meson-gx: add dram-access-quirk property

Message ID 20190527124307.32075-2-narmstrong@baylibre.com (mailing list archive)
State Not Applicable
Headers show
Series mmc: meson-gx: add dram-access-quirk support | expand

Commit Message

Neil Armstrong May 27, 2019, 12:43 p.m. UTC 
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 <martin.blumenstingl@googlemail.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
---
 Documentation/devicetree/bindings/mmc/amlogic,meson-gx.txt | 4 ++++
 1 file changed, 4 insertions(+)

Comments

Ulf Hansson May 28, 2019, 8:53 a.m. UTC | #1 
On Mon, 27 May 2019 at 14:43, Neil Armstrong <narmstrong@baylibre.com> 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 <martin.blumenstingl@googlemail.com>
> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>

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
>
diff mbox series

Patch

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 {