On Sat, 31 Jan 2015 04:54:47 +0200 Siarhei Siamashka <siarhei.siamas...@gmail.com> wrote:
> On Sun, 11 Jan 2015 20:34:55 +0100 > Hans de Goede <hdego...@redhat.com> wrote: > > > Hookup OTG USB controller support and enable the otg controller + USB-keyb > > on various tablets. > > > > This allows tablet owners to interact with u-boot without needing to solder > > a serial console onto their tablet PCB. > > Thanks. Works great on my Primo73 and Primo81 tablets. However I have > just one naive question before happily taking it into use by default. > > Is the hardcoded otg host mode (without checking the id pin) always > safe? For example, what happens if somebody connects a charger instead > of a usb keyboard to the tablet? So, does anyone have any idea if it is theoretically safe to have two USB hosts connected to each other and both driving VBUS at +5V? A somewhat realistic scenario is booting an Allwinner tablet over USB using the FEL mode. Is it a good idea for such tablet to have CONFIG_USB_MUSB_SUNXI=y and CONFIG_USB0_VBUS_PIN="axp_drivebus" in defconfig? -- Best regards, Siarhei Siamashka _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
