From 26c312281336b55eba01ea1e7b85740d383076c6 Mon Sep 17 00:00:00 2001 From: Helmut Grohne Date: Wed, 20 Jun 2018 13:32:51 +0200 Subject: dt-bindings: mmc: broken clock stable indicator on arasan controllers Some controllers immediately report that their internal clock is stable after activating it even when the clock is not stable. When used in conjunction with older/slower cards, this can result in: mmc0: error -84 whilst initialising SD card This flag allows documenting and thus working around such a hardware defect. Signed-off-by: Helmut Grohne Acked-by: Adrian Hunter Reviewed-by: Rob Herring Signed-off-by: Ulf Hansson --- Documentation/devicetree/bindings/mmc/arasan,sdhci.txt | 2 ++ 1 file changed, 2 insertions(+) diff --git a/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt b/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt index 60481bfc3d31..28332b655d2e 100644 --- a/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt +++ b/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt @@ -39,6 +39,8 @@ Optional Properties: - xlnx,fails-without-test-cd: when present, the controller doesn't work when the CD line is not connected properly, and the line is not connected properly. Test mode can be used to force the controller to function. + - xlnx,int-clock-stable-broken: when present, the controller always reports + that the internal clock is stable even when it is not. Example: sdhci@e0100000 { -- cgit