> -----Original Message----- > From: Ulf Hansson [mailto:ulf.hansson@xxxxxxxxxx] > Sent: Friday, January 13, 2017 7:23 PM > To: Bough Chen <haibo.chen@xxxxxxx> > Cc: Shawn Lin <shawn.lin@xxxxxxxxxxxxxx>; Clemens Gruber > <clemens.gruber@xxxxxxxxxxxx>; linux-mmc@xxxxxxxxxxxxxxx; Linus Walleij > <linus.walleij@xxxxxxxxxx>; Adrian Hunter <adrian.hunter@xxxxxxxxx>; A.S. > Dong <aisheng.dong@xxxxxxx>; linux-kernel@xxxxxxxxxxxxxxx; Gary Bisson > <gary.bisson@xxxxxxxxxxxxxxxxxxx>; Fabio Estevam <festevam@xxxxxxxxx>; > Shawn Guo <shawnguo@xxxxxxxxxx> > Subject: Re: eMMC boot problem: switch to bus width 8 ddr failed > > [...] > > > Hi Ulf and Shawn, > > > > Aisheng and I debug this issue these days, and we find the root cause. > > There are two things to describe. > > > > 1) voltage switch issue. The properity "no-1-8-v" do not work for > MMC_TIMING_MMC_DDR52. > > This is another bug, we need to fix, but has no relation with the current bug. > > I am working on a patch which invents MMC_CAP_3_3V_DDR and which has a > corresponding DT binding "mmc-ddr-3_3v". > Give me a day or so, then I will post it. > > Likely it should help to resolve your issue, don't you think? Seems Yes, I will test the patch when you post. Best Regards, Haibo Chen > > [...] > > Kind regards > Uffe ��.n��������+%������w��{.n�����{��i��)�� jg��� �����ݢj����G���� ���j:+v���w�m������w�������h�����٥
