> -----Original Message----- > From: linux-omap-owner@xxxxxxxxxxxxxxx > [mailto:linux-omap-owner@xxxxxxxxxxxxxxx] On Behalf Of Menon, Nishanth > Sent: Thursday, January 06, 2011 7:15 PM > To: Koen Kooi > Cc: Hilman, Kevin; l-o; l-a; Tony > Subject: Re: [PATCH 2/2] OMAP3: beagle xm: enable upto 800MHz OPP > > Koen Kooi had written, on 01/06/2011 07:00 AM, the following: > > Op 6 jan 2011, om 13:24 heeft Nishanth Menon het volgende > geschreven: > > > >> Kevin Hilman wrote, on 01/05/2011 05:28 PM: > >>> Nishanth Menon<nm@xxxxxx> writes: > >>> > >>>> Beagle XM uses 3730 and the board design allows enabling > 800MHz and 1GHz > >>>> OPPs. However, We need Smart reflex class 1.5 and ABB to > enable 1GHz safely. > >>>> For the moment, we tweak the default table to allow for > 800Mhz OPP usage. > >>> Isn't this common to any board using 3730 (or 3630?) > >> no it is not. only certain boards are capable of higher > frequencies - there is a procedure called PDN analysis and > vmin search that needs to be performed to guarentee this. > > > > What about the "new" 3530s that can run at 720MHz? Those > have been speed binned and given a different SKU. I'm using > the attached 4 patches (Tony master + beagle patches _+ dvfs: > http://dominion.thruhere.net/git/cgit.cgi/linux-omap/log/?h=ko > en/beagle-next) on my beagle C4 and overo tide to get 720MHz. > They don't really work: > for 3530, keep in mind that not *all* boards can support > 720MHz (esp the > old 3430 boards, like my poor SDP3430). > since we consider 3530 as 3430 as well, add a default disabled 720MHz > OPP in the 3430 table and enable it: > a) if this has anything to do with board behavior (which, > unlike 36xx, I > dont think is the case for 35xx), enable similar to this patch on the > required boards on a need basis (e.g. based on board rev) > b) if this is a silicon behavior, then, you should modify the > omap3_opp_init to ensure that for the right silicon this is enabled > (e.g. only for 3530 rev X onwards or something similar) - but > you will > need some way to detect it in s/w (not through bootargs please!) Nishanth, Some of the patches generic that Koen attached are based on my submissions. As part of migration to 2.6.37, I am in process of validating them on internal integration tree. Will post them soon... may be end of tomorrow. I will be testing them on OMAP3EVM. ~sanjeev [snip]...[snip] -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
