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 > <javascript:>> 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 ). -- 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.
