On Wed, Jun 05, 2019 at 06:02:48PM -0700, Bjorn Andersson wrote: > Acquire the device-reset GPIO and toggle this to reset the UFS device > during initialization and host reset. > > Based on downstream support implemented by Subhash Jadavani > <subhashj@xxxxxxxxxxxxxx>. > > Tested-by: John Stultz <john.stultz@xxxxxxxxxx> > Signed-off-by: Bjorn Andersson <bjorn.andersson@xxxxxxxxxx> > --- > > Changes since v1: > - Added gpio to DT binding document > - Fixed spelling of UFS > > .../devicetree/bindings/ufs/ufshcd-pltfrm.txt | 2 + > drivers/scsi/ufs/ufshcd.c | 44 +++++++++++++++++++ > drivers/scsi/ufs/ufshcd.h | 4 ++ > 3 files changed, 50 insertions(+) > > diff --git a/Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt b/Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt > index a74720486ee2..d562d8b4919c 100644 > --- a/Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt > +++ b/Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt > @@ -54,6 +54,8 @@ Optional properties: > PHY reset from the UFS controller. > - resets : reset node register > - reset-names : describe reset node register, the "rst" corresponds to reset the whole UFS IP. > +- device-reset-gpios : A phandle and gpio specifier denoting the GPIO connected > + to the RESET pin of the UFS memory device. A sign we should have a child node for the device... Doesn't using 'reset-gpios' work as I doubt one would have a GPIO reset for the host controller. Rob
