On 4/2/20 3:43 PM, Pascal PAILLET-LME wrote: Hi, [...]
>>>> No details on my side, it was a Pascal Paillet's direct feedback >>>> (Maintainer >> of >>>> STPMIC1 driver in Linux). >>> You can enable the active discharge on the STPMIC1's VBUSOTG. But, as >> soon as a USB host peripheral (such as laptop) will attach and provide VBUS, >> there will be a ~8mA continuous power consumption on VBUS through this >> OTG active discharge. There is no functional issue behind this 8mA; but you >> need to know that 8mA is not compliant with the USB suspend constraint >> (2.5mA max). >> >> So why is it in there ? > Sorry, I'm not sure to catch your point... The property is available because > the stpmic1 > Propose this feature (enable a pull down resistor when VBUS_OTG is disabled). > We have > Found during some test that it is better to not enable active discharge on > vbus_otg. > I hope it answers, > pascal Can you go into a bit more detail on what you found during your tests and why it was a problem ?
