On Thursday, September 11, 2014 10:23:40 AM UTC-4, Tom Rini wrote: > > On Friday, September 5, 2014 1:39:04 PM UTC-4, RobertCNelson wrote: >> >> On Fri, Sep 5, 2014 at 12:32 PM, Gerald Coley <ger...@beagleboard.org> >> wrote: >> > SW is supposed to set it to 1.35V. Sounds like it got dropped somewhere >> > because initially it did.. It was designed this way because when it was >> > designed, the PMIC defaulted to 1.5V. Since the design there is a >> TPS65217D >> > that was release later that supports the 1.35V initial setting. >> >> It should be set here: >> >> >> http://git.denx.de/?p=u-boot.git;a=blob;f=board/ti/am335x/board.c;h=0739e6021a21e71d7d0f5c840b793ce7fdf98fae;hb=HEAD#l275 >> >> >> 269 /* >> 270 * Increase USB current limit to 1300mA or 1800mA and >> set >> 271 * the MPU voltage controller as needed. >> 272 */ >> 273 if (dpll_mpu_opp100.m == MPUPLL_M_1000) { >> 274 usb_cur_lim = >> TPS65217_USB_INPUT_CUR_LIMIT_1800MA; >> 275 mpu_vdd = TPS65217_DCDC_VOLT_SEL_1325MV; >> 276 } else { >> 277 usb_cur_lim = >> TPS65217_USB_INPUT_CUR_LIMIT_1300MA; >> 278 mpu_vdd = TPS65217_DCDC_VOLT_SEL_1275MV; >> 279 } >> >> >> But that only happens if you have the "beaglebone black" header in >> eeprom: >> >> 262 /* >> 263 * Override what we have detected since we know if we >> have >> 264 * a Beaglebone Black it supports 1GHz. >> 265 */ >> 266 if (board_is_bone_lt(&header)) >> >> So you'll have to override that check. >> > > Note that the question was about DCDC1 and DDR voltage not DCDC2/3 (CORE > and MPU) voltage. I don't know what initial bring-up U-Boot was whacking > DCDC1 but it never reached the rest of the world so it's more a happy > accident that should be corrected (and wouldn't be too hard to do, if > anyone out there is looking for a reason to get their feet wet ). >
Yeah, I was looking for DCDC1 and couldn't find it, so I'm working on adding it now. Not sure how quick I'll get it posted, so I wouldn't mind someone else chiming in with the fix. > > -- > Tom > -- 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 beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
