Commit 26c31228 authored Jun 20, 2018 by Helmut Grohne Committed by Ulf Hansson Jul 16, 2018

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 <h.grohne@intenta.de>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

parent 5637ffad

Documentation/devicetree/bindings/mmc/arasan,sdhci.txt

+2 −0

Original line number	Diff line number	Diff line
		@@ -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 {