On Mon, Aug 29, 2016 at 06:20:56PM -0500, Zach Brown wrote: > The sdhci controller on xilinx zynq devices will not function unless > the CD bit is provided. http://www.xilinx.com/support/answers/61064.html > In cases where it is impossible to provide the CD bit in hardware, > setting the controller to test mode and then setting inserted to true > will get the controller to function without the CD bit. > > The device property "fails-without-test-cd" will let the arasan driver know > the controller does not have the CD line wired and that the controller > does not function without it. > > Signed-off-by: Zach Brown <zach.brown@xxxxxx> > --- > v2: > * improved commit messages > * removed fake-cd device property > * removed fake-cd quirk > * use broken-cd device property > * documented new usage of broken-cd > v3: > * removed new usage of broken-cd > * created fails-without-test-cd device property > * created arasan controller specific quirk > > > Documentation/devicetree/bindings/mmc/arasan,sdhci.txt | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt b/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt > index 3404afa..ec0dc82 100644 > --- a/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt > +++ b/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt > @@ -21,6 +21,10 @@ Required Properties: > - interrupts: Interrupt specifier > - interrupt-parent: Phandle for the interrupt controller that services > interrupts for this device. > +Optional Properties: > +- 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. Prefix with either arasan or xlnx. Seems more likely Xilinx specific to me. Rob -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
