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]> a écrit : > On May 18, 2016, at 1:58 AM, Micka <[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 > > 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 > --- > 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]. > 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. > > > -- > For more options, visit 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]. > 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. > -- For more options, visit 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]. 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. For more options, visit https://groups.google.com/d/optout.
