On Mon, 10 May 2021 at 21:04, Lucas Stach <l.stach@xxxxxxxxxxxxxx> wrote: > > From: Lucas Stach <dev@xxxxxxxxxx> > > HS400 requires a data strobe line in addition to the usual MMC signal > lines. If a board design neglects to wire up this signal, HS400 mode is > not available, even if both the controller and the eMMC are claiming to > support this mode. Add a DT flag to allow boards to disable the HS400 > support in this case. > > Signed-off-by: Lucas Stach <dev@xxxxxxxxxx> > Acked-by: Rob Herring <robh@xxxxxxxxxx> Applied for next, thanks! Kind regards Uffe > --- > Documentation/devicetree/bindings/mmc/mmc-controller.yaml | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/Documentation/devicetree/bindings/mmc/mmc-controller.yaml b/Documentation/devicetree/bindings/mmc/mmc-controller.yaml > index e141330c1114..ac80d09df3a9 100644 > --- a/Documentation/devicetree/bindings/mmc/mmc-controller.yaml > +++ b/Documentation/devicetree/bindings/mmc/mmc-controller.yaml > @@ -220,6 +220,11 @@ properties: > description: > eMMC HS400 enhanced strobe mode is supported > > + no-mmc-hs400: > + $ref: /schemas/types.yaml#/definitions/flag > + description: > + All eMMC HS400 modes are not supported. > + > dsr: > description: > Value the card Driver Stage Register (DSR) should be programmed > -- > 2.31.1 >
