Best Regards Jerry Huang > -----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. -- 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
