| Message ID | 1444335766-8524-3-git-send-email-siarhei.siamashka@gmail.com |
|---|---|
| State | Accepted |
| Delegated to: | Hans de Goede |
| Headers | show |
diff --git a/configs/Linksprite_pcDuino_defconfig b/configs/Linksprite_pcDuino_defconfig index 68d9137..13b7ed3 100644 --- a/configs/Linksprite_pcDuino_defconfig +++ b/configs/Linksprite_pcDuino_defconfig @@ -1,6 +1,8 @@ CONFIG_ARM=y CONFIG_ARCH_SUNXI=y CONFIG_MACH_SUN4I=y +CONFIG_USB1_VBUS_PIN="" +CONFIG_USB2_VBUS_PIN="" CONFIG_DEFAULT_DEVICE_TREE="sun4i-a10-pcduino" # CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set CONFIG_SPL=y
The pcDuino1 board unconditionally provides 5V to USB host receptacles. The pcDuino2 board has a voltage regulator, controlled by the PD2 pin which is pulled-up by default (so that the USB power is also enabled by default). Not specifying pins for enabling USB power in the defconfig means that the PH3 and PH6 pins are driven high by default. The PH6 pin is available on the Arduino-compatible expansion header and touching it is not nice (this may be even dangerous, depending on what kind of role is assigned to this particular pin by various Arduino shields). This patch explicitly configures the USB VBUS pins to "", which means that no pins should be touched. The patch has been tested on a pcDuino2 board and USB still works. Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com> --- configs/Linksprite_pcDuino_defconfig | 2 ++ 1 file changed, 2 insertions(+)