On Sat, Feb 25, 2023, Prashanth K wrote: > > > On 25-02-23 12:08 am, Thinh Nguyen wrote: > > On Fri, Feb 24, 2023, Prashanth K wrote: > > > > > > > > > On 24-02-23 01:40 am, Thinh Nguyen wrote: > > > > On Thu, Feb 23, 2023, Prashanth K wrote: > > > > > Currently we don't change the current value if device isn't in > > > > > configured state. But the battery charging specification says, > > > > > > > > Can you provide the spec section also? > > > > > > > 1.2 Background > > > 1.4.13 Standard Downstream Port > > > > > > Did you mean to add these in the commit message? > > > > Yes, it's better to have the reference in case we need to revisit this. > I have added it in v4 patch, thanks for pointing it out. > > > > > > > device can draw up to 100mA of current if its in unconfigured > > > > > > > > Is this related to being self-powered? > > > > > I think its applicable for bus-powered devices. > > > > No, I mean before configured state, is the device considered > > self-powered? Since being self-powered means drawing 100mA or less, we > > can use USB_SELF_POWER_VBUS_MAX_DRAW to provide more context. If it's > > totally unrelated, then you can ignore this. > > > > Thanks, > > Thinh > As per my understanding, those are 2 different things. A self-powered device > isn't allowed to draw more than 100mA. And an unconfigured device > isn't allowed to draw more than 100mA (in HS). One thing that I recently > found out is that, as per usb3.0 spec, SS device can only draw up to 150mA > if its unconfigured state. So i have to check the speed and set the current > values accordingly. I see. Thanks for the info. Thanks, Thinh
