Hi all, What kernel config options do I need to turn on for OTG to work on the A20? It doesn't appear to be enabled in sunxi_defconfig or multi_v7_defconfig.
The patch below adds support for OTG for the pcDuino v3 Nano based on the schematic, and I've verified that PH4 is indeed the ID pin by reading it as a GPIO (it reads 0 with a host adaptor plugged in and 1 with nothing plugged in), but trying various likely-looking config options hasn't resulted in it actually detecting devices, so I assume there's something I'm meant to have enabled that I haven't... Thanks, Adam Sampson <a...@offog.org> <http://offog.org/> --- (Not tested...) The OTG arrangement on the LinkSprite pcDuino v3 Nano is the same as the pcDuino 1/2/3: the OTG port's 5V line is connected directly to the 5V bus (it's not switchable), and the OTG port's ID pin is connected to PH4 on the A20. Signed-off-by: Adam Sampson <a...@offog.org> --- arch/arm/boot/dts/sun7i-a20-pcduino3-nano.dts | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/arch/arm/boot/dts/sun7i-a20-pcduino3-nano.dts b/arch/arm/boot/dts/sun7i-a20-pcduino3-nano.dts index beac431..1757a6a 100644 --- a/arch/arm/boot/dts/sun7i-a20-pcduino3-nano.dts +++ b/arch/arm/boot/dts/sun7i-a20-pcduino3-nano.dts @@ -142,6 +142,10 @@ status = "okay"; }; +&otg_sram { + status = "okay"; +}; + &pio { ahci_pwr_pin_pcduino3_nano: ahci_pwr_pin@0 { allwinner,pins = "PH2"; @@ -157,6 +161,13 @@ allwinner,pull = <SUN4I_PINCTRL_NO_PULL>; }; + usb0_id_detect_pin: usb0_id_detect_pin@0 { + allwinner,pins = "PH4"; + allwinner,function = "gpio_in"; + allwinner,drive = <SUN4I_PINCTRL_10_MA>; + allwinner,pull = <SUN4I_PINCTRL_PULL_UP>; + }; + usb1_vbus_pin_pcduino3_nano: usb1_vbus_pin@0 { allwinner,pins = "PD2"; allwinner,function = "gpio_out"; @@ -211,7 +222,15 @@ status = "okay"; }; +&usb_otg { + dr_mode = "otg"; + status = "okay"; +}; + &usbphy { + pinctrl-names = "default"; + pinctrl-0 = <&usb0_id_detect_pin>; + usb0_id_det-gpio = <&pio 7 4 GPIO_ACTIVE_HIGH>; /* PH4 */ usb1_vbus-supply = <®_usb1_vbus>; usb2_vbus-supply = <®_usb1_vbus>; status = "okay"; -- 2.1.4 -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
