On Fri, Oct 09, 2015 at 02:09:37PM +0300, Siarhei Siamashka wrote: > The pcDuino1 board does not use any power switches at all for its > two USB host ports and the VBUS pins are always connected to 5V. > > The pcDuino2 board uses the RT9701GB power switch for its single > USB host port, but the USB_EN pin (PD2) is pulled up with a 10K > resistor. So that the USB power is still enabled by default, > resulting in the same behaviour as pcDuino1 if nobody touches > the PD2 pin. This minor difference is going to be handled in a > follow-up patch, introducing a separate dts file for pcDuino2. > > The primary reason for this fix is that the current dts file > unnecessarily meddles with the PH3 and PH6 pins. But the PH6 pin > is available on the Arduino-compatible expansion header and may > have a better use for other purposes. This patch fixes the > problem and now the PH6 pin can be used with the GPIO sysfs > interface. Tested on a pcDuino2 board with a multimeter: > > echo 230 > /sys/class/gpio/export > echo "out" > /sys/class/gpio/gpio230/direction > echo 0 > /sys/class/gpio/gpio230/value > echo 1 > /sys/class/gpio/gpio230/value > > USB still works as expected too. > > Signed-off-by: Siarhei Siamashka <siarhei.siamashka@xxxxxxxxx> Applied, thanks! Maxime -- Maxime Ripard, Free Electrons Embedded Linux, Kernel and Android engineering http://free-electrons.com
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