Things considering tranceiver suspend/wakeup are welcom, cause it seems to be mysteric, how to operate with. Sometimes clock aren't shutoff in suspend. Sometimes, wakeup is not succesfull. On 6/19/09, David Brownell <david-b@xxxxxxxxxxx> wrote: > On Monday 18 May 2009, Woodruff, Richard wrote: >> >> > From: linux-omap-owner@xxxxxxxxxxxxxxx [mailto:linux-omap- >> > owner@xxxxxxxxxxxxxxx] On Behalf Of Niilo Minkkinen >> > Sent: Monday, May 18, 2009 9:54 AM >> >> > Omap3 MUSB AUTOIDLE functionality configured through OTG_SYSCONFIG >> > register prevents the device from going into retention. >> > This is a workaround (by Richard Woodruff/TI), as his comment : >> > > A new MUSB bug which is a match to data below was identified very >> > > recently (on hardware and in simulation). >> > > This bug is in 3430 and not 3630. >> > > As a priority test (and as new default) you should have engineers >> > > disable autoidle for MUSB block. >> > > This is the workaround which will show up in next errata. >> > >> > Signed-off-by: Niilo Minkkinen <ext-niilo.1.minkkinen@xxxxxxxxx> >> >> Signed-off-by: Richard Woodruff <r-woodruff2@xxxxxx> >> >> Yes this is needed for 34xx. Side note is this cost around 1mW of power >> during active mode of MUSB. When device is not active cost is not >> significant. System impact depends on duty cycle of MUSB in usecase. > > There's also some initialization goofiness in that code ... it's supposed > to set initialize the transceiver with several distinct writes, of which > setting AUTOIDLE (to auto-gate the L3 clock) is ISTR the last step. > > The goofiness shows up with OTG initialization, which is documented as > needing a slightly different sequence ... my notes have it as being > an extra write to set ENABLEFORCE. > > - Dave > -- > 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 > -- --------------------------------- Niilo Minkkinen Kalhontie 69C 40950 MUURAME +358407324526 niilo.minkkinen@xxxxxx Arvokkainta ihmiselle on vapaus tehdä omia päätöksiä, jotka ovat joskus vääriäkin - Gottfried Leibniz (1646–1716) - ---------------------------------- -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
