> > > >> -----Original Message----- > >> From: Chris Ball [mailto:cjb@xxxxxxxxxx] > >> Sent: Wednesday, September 12, 2012 4:59 AM > >> To: Kumar Gala > >> Cc: Huang Changming-R66093; linuxppc-dev@xxxxxxxxxxxxxxxx list; > >> linux- mmc@xxxxxxxxxxxxxxx; Anton Vorontsov > >> Subject: Re: [PATCH 2/3] powerpc/esdhc: add property to disable the > >> CMD23 > >> > >> Hi, > >> > >> On Tue, Sep 11 2012, Kumar Gala wrote: > >>> thanks for the info. Do you know what's required on controller side > >>> to handle cards that support CMD23? > >>> > >>> I'm trying to figure out if older controller's on FSL SoCs are > >>> missing some feature to allow CMD23 to work (vs Auto-CMD23). > >> > >> It seems plausible that it's just not implemented on these controllers. > >> It's a little strange, since the command's been specified for so long > >> and we haven't seen any other controllers with problems. The patch > >> would be correct if this is true. > >> > > > > I didn't find any description about it, but after testing on FSL > silicones, I got this result: > > Some silicones support this command, and some silicones don't support > it, which will cause I/O error. > > Can you list out which SoCs support it and which don't. Having this list > will be useful in understanding which controller versions supported it. > P1020, p1021, p1022, p1024, p1015 and p4080 can't support it. Mpc8536, p2020, and the other current DPAA silicon (e.g. p5020, p3041) support it. -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
