Hi Wolfram, > -----Original Message----- > From: Wolfram Sang [mailto:w.sang@xxxxxxxxxxxxxx] > Sent: Tuesday, February 15, 2011 3:46 PM > To: Nath, Arindam > Cc: cjb@xxxxxxxxxx; linux-mmc@xxxxxxxxxxxxxxx; Su, Henry; Lu, Aaron; > anath.amd@xxxxxxxxx > Subject: Re: [PATCH 02/12] mmc: sd: add support for signal voltage > switch procedure > > On Tue, Feb 15, 2011 at 03:05:00PM +0530, Arindam Nath wrote: > > > Host Controller v3.00 adds another Capabilities register. We can > > directly read this register without any version checking since the > > new register bits will be considred as reserved in older controllers, > > and will be read as 0. > > I so much wish you were right, but reality is different :( > > The i.MX35-processor, for example, has a custom watermark-register > there. I > could fix this by intercepting the read using io-accessors, but to > minimize > potential regressions on older controllers in general, I'd say the > check for v3 > might be justified? Thanks for the suggestion. I will add the changes in V2 of the patchset. Regards, Arindam -- 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
