On 21 September 2018 at 11:46, Ludovic Barre <ludovic.Barre@xxxxxx> wrote: > From: Ludovic Barre <ludovic.barre@xxxxxx> > > STM32 sdmmc variant has support to: > -Indicate signal directions (only one property > for d0dir, d123dir, cmd_dir) > -Select command and data phase relation. > -Select "clock in" from an external driver. > > Signed-off-by: Ludovic Barre <ludovic.barre@xxxxxx> > --- > change v3: > -remove space at end of "st,use-ckin " > > Documentation/devicetree/bindings/mmc/mmci.txt | 9 +++++++++ Please split this. DT doc changes should be separate patches. > drivers/mmc/host/mmci.c | 6 ++++++ > drivers/mmc/host/mmci.h | 1 + > 3 files changed, 16 insertions(+) > > diff --git a/Documentation/devicetree/bindings/mmc/mmci.txt b/Documentation/devicetree/bindings/mmc/mmci.txt > index e952707..d678933 100644 > --- a/Documentation/devicetree/bindings/mmc/mmci.txt > +++ b/Documentation/devicetree/bindings/mmc/mmci.txt > @@ -19,6 +19,7 @@ Optional properties: > the ID provided by the HW > - vqmmc-supply : phandle to the regulator device tree node, mentioned > as the VCCQ/VDD_IO supply in the eMMC/SD specs. > +specific for ux500 variant: > - st,sig-dir-dat0 : bus signal direction pin used for DAT[0]. > - st,sig-dir-dat2 : bus signal direction pin used for DAT[2]. > - st,sig-dir-dat31 : bus signal direction pin used for DAT[3] and DAT[1]. > @@ -26,6 +27,14 @@ Optional properties: > - st,sig-dir-cmd : cmd signal direction pin used for CMD. > - st,sig-pin-fbclk : feedback clock signal pin used. > > +specific for sdmmc variant: > +- st,sig-dir : signal direction polarity used for cmd, dat0 dat123. > +- st,neg-edge : data & command phase relation, generated on > + sd clock falling edge. > +- st,use-ckin : use ckin pin from an external driver to sample > + the receive data (example: with voltage > + switch transceiver). [...] Kind regards Uffe
