Hi Shawn, Am Sonntag, 7. August 2016, 11:40:21 schrieb Shawn Lin: > On 2016/7/19 3:46, Heiko Stübner wrote: > > Am Montag, 18. Juli 2016, 23:32:32 schrieb Randy Li: > >> The Firefly RK3288 Reload is a combination Firefly rk3288 core board > >> with the Reload baseboard. Add a dtsi for the Firefly rk3288 core > >> which can be included into the dts for the various baseboards > >> in the future and dts for Reload base board. > >> > >> Currently supported are serial console, wired networking, eMMC and > >> SD storage, SPFIF, IR receiver, LEDs, SDIO wifi and USB. But only > >> the OTG could work on the host mode now, the other USB host can't > >> work now, additional patches are required. > >> > >> Signed-off-by: Randy Li <ayaka@xxxxxxxxxxx> > >> Acked-by: Rob Herring <robh@xxxxxxxxxx> > > > > applied [0], after some minor reordering - please double check. > > > > Also, while the branch is named 4.8 this will only go into 4.9, as the > > merge- window supposedly opens on the weekend. > > Sorry for the noise here:), but I find there is some mmc stuff > which confuse me. Maybe Randy could elaborate more? > > Your sdmmc claims to support UHS-I mode like sd-uhs-sdr104, etc, which > will ask dw_mmc to switch vqmmc from 3V3 to 1V8 after sending CMD11. > > But the vqmmc is vccio_sd which is fixed as 3V3? :) so far we have only been able to achieve UHS speeds on devices based on the rk808 pmic (I had sucess on veyron and popmetal). The act8846-based boards seem to have some issue when trying to do the switch to 1.8V, resulting in mmc errors and the mmc-core switching back to 3.3V. I think this might be caused by a bug in the act8846 driver or some dts mistake. But so far nobody had the time and enthusiasm to investigate :-) Heiko -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
