On 17 August 2015 at 09:15, Li Jun <b47624@xxxxxxxxxxxxx> wrote: > On Fri, Aug 14, 2015 at 07:04:56PM +0800, Baolin Wang wrote: >> On 14 August 2015 at 16:55, Li Jun <b47624@xxxxxxxxxxxxx> wrote: >> > Hi Baolin, >> > >> > On Fri, Aug 14, 2015 at 05:47:43PM +0800, Baolin Wang wrote: >> >> Currently the Linux kernel does not provide any standard integration of this >> >> feature that integrates the USB subsystem with the system power regulation >> >> provided by PMICs meaning that either vendors must add this in their kernels >> >> or USB gadget devices based on Linux (such as mobile phones) may not behave >> >> as they should. >> >> >> >> Providing a standard framework for doing this in the kernel. >> >> >> > >> > Why not add power supply class support into this? >> > >> >> Hi Jun, >> >> We don't need the power supply class support into the usb charger, > I suppose usb charger is also a power supply for the system, we can use power > supply class framework for notify mechanism and get/set many attributes(maybe > also the current limit), I see those usb charger drivers under ./driver/power/ > are designed with power supply supported. > I don't think so. The usb charger is rely on the usb gadget, which is not a complete power supply device and it combines the usb and the power supply. Thus we make it into usb gadget system. Thanks. > Li Jun >> just introduce the notify mechanism for power to set the current limit >> when notifying some events from usb charger. Maybe I misunderstand >> your meanings, please describe it detailedly. Thanks for your >> comments. >> >> > Li Jun >> > >> >> >> >> -- >> Baolin.wang >> Best Regards -- Baolin.wang Best Regards -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
