http://processors.wiki.ti.com/index.php/DVFS_User_Guide
Regards, John > On May 19, 2016, at 12:46 AM, Micka <[email protected]> wrote: > > I already looked at that file and in the starterware there is no line that > contain DEFDCD3. > > What I'm saying, is that nowhere I find the same value for DEFDCD3. Some time > it's 1.125V, somehwere else it's .95V-1.1V and in the BB_SRM it is 1.1V . > > I'm asking to Gerald, what is the correct value for Vdd_Core ? I think that > the correct one is 1.1V. And what is the range ? 0.95V-1.1V ( device tree ) > > Le mer. 18 mai 2016 à 22:31, John Syne <[email protected] > <mailto:[email protected]>> a écrit : >> On May 18, 2016, at 1:58 AM, Micka <[email protected] >> <mailto:[email protected]>> wrote: >> >> Hi, >> >> In the u-boot >> http://git.denx.de/?p=u-boot.git;a=blob;f=board/ti/am335x/board.c;h=4330be64994dc6cbfaff4b865fee44d82f660a3d;hb=HEAD#l255 >> >> <http://git.denx.de/?p=u-boot.git;a=blob;f=board/ti/am335x/board.c;h=4330be64994dc6cbfaff4b865fee44d82f660a3d;hb=HEAD#l255> >> >> there is those lines : >> >> 255 >> <http://git.denx.de/?p=u-boot.git;a=blob;f=board/ti/am335x/board.c;h=4330be64994dc6cbfaff4b865fee44d82f660a3d;hb=HEAD#l255> >> /* Set DCDC3 (CORE) voltage to 1.125V */ >> 256 >> <http://git.denx.de/?p=u-boot.git;a=blob;f=board/ti/am335x/board.c;h=4330be64994dc6cbfaff4b865fee44d82f660a3d;hb=HEAD#l256> >> if (tps65217_voltage_update(TPS65217_DEFDCDC3, >> 257 >> <http://git.denx.de/?p=u-boot.git;a=blob;f=board/ti/am335x/board.c;h=4330be64994dc6cbfaff4b865fee44d82f660a3d;hb=HEAD#l257> >> TPS65217_DCDC_VOLT_SEL_1125MV)) >> >> >> In the device tree there is those lines : >> >> dcdc3_reg: regulator@2 { >> /* VDD_CORE voltage limits 0.95V - 1.1V with +/-4% >> tolerance */ >> regulator-name = "vdd_core"; >> regulator-min-microvolt = <925000>; >> regulator-max-microvolt = <1150000>; >> regulator-boot-on; >> regulator-always-on; >> }; >> >> in the starterware from texas + the patch for the bbb I have nothing >> concerning the DEFDCD3. >> >> And finally in the BBB_SRM you have those lines : >> >> The VDD_CORE rail can deliver up to 1.2A at 1.1V. This rail is not >> accessible for use anywhere else on the board and only connects to the >> processor. This rail is fixed at 1.1V and is not scaled. >> >> So what is the correct configuration for this output ? > > I believe this is done in bootloader/src/armv7a/am335x/bl_platform.c > > In essence, you have to create a bootable SDCard for Starterware which sets > the regulator voltages for you. > > Regards, > John >> >> >> Micka, >> >> >> >> -- >> For more options, visit http://beagleboard.org/discuss >> <http://beagleboard.org/discuss> >> --- >> You received this message because you are subscribed to the Google Groups >> "BeagleBoard" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected] >> <mailto:[email protected]>. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/beagleboard/CAF%2BMRtm7heTJ45tuWoHt9v1ajBV4XN%2BCk7t%2BfGTn-mrjjJsD%2BA%40mail.gmail.com >> >> <https://groups.google.com/d/msgid/beagleboard/CAF%2BMRtm7heTJ45tuWoHt9v1ajBV4XN%2BCk7t%2BfGTn-mrjjJsD%2BA%40mail.gmail.com?utm_medium=email&utm_source=footer>. >> For more options, visit https://groups.google.com/d/optout >> <https://groups.google.com/d/optout>. > > > -- > For more options, visit http://beagleboard.org/discuss > <http://beagleboard.org/discuss> > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected] > <mailto:[email protected]>. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/D2B2F1F3-E3ED-43C6-9B24-2D32028E99B4%40gmail.com > > <https://groups.google.com/d/msgid/beagleboard/D2B2F1F3-E3ED-43C6-9B24-2D32028E99B4%40gmail.com?utm_medium=email&utm_source=footer>. > For more options, visit https://groups.google.com/d/optout > <https://groups.google.com/d/optout>. > > -- > For more options, visit http://beagleboard.org/discuss > <http://beagleboard.org/discuss> > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected] > <mailto:[email protected]>. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/CAF%2BMRtk%3DekMzxdLE6J%2BnUF6aef7EC78EUg_GPRzA76_yAPk%3DiQ%40mail.gmail.com > > <https://groups.google.com/d/msgid/beagleboard/CAF%2BMRtk%3DekMzxdLE6J%2BnUF6aef7EC78EUg_GPRzA76_yAPk%3DiQ%40mail.gmail.com?utm_medium=email&utm_source=footer>. > For more options, visit https://groups.google.com/d/optout > <https://groups.google.com/d/optout>. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. 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