For my use case it's perfect: the board is powered by a cape. we disabled power from USB, because the cape is not made to be powered by the beagle.
and yes you are right, the PPATH is hard reset to 1. Le mar. 3 janv. 2017 à 10:53, Heinz Hummel <[email protected]> a écrit : > Hello Micka, > > is this permanent? Means does the PMIC know even after a power cycle to > not to use USB power any more? As far as I understood the description of > USB_EN in the PPATH register, this is reset to default values after power > was turned off... > > Thanks :-) > > > 2017-01-03 10:48 GMT+01:00 Micka <[email protected]>: > > The proper way is to modify the driver tps65217.c : > > diff --git a/drivers/mfd/tps65217.c b/drivers/mfd/tps65217.c > index ca19130..a7ae900 100644 > --- a/drivers/mfd/tps65217.c > +++ b/drivers/mfd/tps65217.c > @@ -253,6 +253,7 @@ static int tps65217_probe(struct i2c_client *client, > bool status_off = false; > int irq = -1, irq_gpio = -1; > int ret; > + bool usb_off = false; > > node = client->dev.of_node; > if (node) { > @@ -265,7 +266,8 @@ static int tps65217_probe(struct i2c_client *client, > chip_id = (unsigned long)match->data; > status_off = of_property_read_bool(node, > "ti,pmic-shutdown-controller"); > - > + usb_off = of_property_read_bool(node, > + "ti,pmic-usb-off"); > /* at first try to get irq via OF method */ > irq = irq_of_parse_and_map(node, 0); > if (irq <= 0) { > @@ -346,6 +348,16 @@ static int tps65217_probe(struct i2c_client *client, > dev_warn(tps->dev, "unable to set the status OFF\n"); > } > > + if(usb_off){ > + ret = tps65217_set_bits(tps, TPS65217_REG_PPATH, > + TPS65217_PPATH_USB_PW_ENABLE, 0, > + TPS65217_PROTECT_NONE); > + if (ret) > + dev_warn(tps->dev, "unable to set the USB power > OFF\n"); > + else > + dev_info(tps->dev, "set the USB power OFF\n"); > + } > + > dev_info(tps->dev, "TPS65217 ID %#x version 1.%d\n", > (version & TPS65217_CHIPID_CHIP_MASK) >> 4, > version & TPS65217_CHIPID_REV_MASK); > > > > It worked for me. ( the source is not committed yet because I didn't clean > the code ) > > > Le lun. 2 janv. 2017 à 08:29, Heinz Hummel <[email protected]> a > écrit : > > Great - thanks! So there is no way to do that programmatically via PMIC? > > 2016-12-29 8:59 GMT+01:00 Alex Hayman <[email protected]>: > > If you cut that trace on a BBB, then the BBB won't power itself up via USB. > > On Friday, December 23, 2016 at 4:25:08 AM UTC-5, Heinz Hummel wrote: > > Hello, > > I have a BBB which is currently powered via USB and external power supply > (and a similar BBG which is powered via USB and via external supply feed > into VDD from connected cape). > > Now when a user wants to do a full power cycle, all possible power sources > have to be disconnected which can be somewhat complicated. > > So my question: is there a possibility to disable power supply via USB? > E.g. a soldering jumper which has to be opened? Or in case not - is there a > possibility to permanently program the PMIC to not to power the board from > USB? > > Thanks! > > -- > For more options, visit http://beagleboard.org/discuss > --- > > You received this message because you are subscribed to a topic in the > Google Groups "BeagleBoard" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/beagleboard/dR_GhlwG0eM/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/5d9e2fb6-14be-4223-9375-2882df001000%40googlegroups.com > <https://groups.google.com/d/msgid/beagleboard/5d9e2fb6-14be-4223-9375-2882df001000%40googlegroups.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/CAHptrU72B91wEm10m1A1GhP0w8Zug-snhgJiKd1z9aCgeg504w%40mail.gmail.com > <https://groups.google.com/d/msgid/beagleboard/CAHptrU72B91wEm10m1A1GhP0w8Zug-snhgJiKd1z9aCgeg504w%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 a topic in the > Google Groups "BeagleBoard" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/beagleboard/dR_GhlwG0eM/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/CAF%2BMRtkXjZqMm9WKaXetSTgM4zeMRtOzq53nKLXir310sp6wmg%40mail.gmail.com > <https://groups.google.com/d/msgid/beagleboard/CAF%2BMRtkXjZqMm9WKaXetSTgM4zeMRtOzq53nKLXir310sp6wmg%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/CAHptrU7rDRZ0d6O4qGb%3Dd0XGfx%2BQtYmV_ZCkffNyQWzQ3gJs%2Bg%40mail.gmail.com > <https://groups.google.com/d/msgid/beagleboard/CAHptrU7rDRZ0d6O4qGb%3Dd0XGfx%2BQtYmV_ZCkffNyQWzQ3gJs%2Bg%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. 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