On Thu, Dec 7, 2017 at 11:56 AM, Chen-Yu Tsai <wens@xxxxxxxx> wrote: > On Thu, Dec 7, 2017 at 2:18 PM, Jagan Teki <jagannadh.teki@xxxxxxxxx> wrote: >> On Thu, Dec 7, 2017 at 8:54 AM, Chen-Yu Tsai <wens@xxxxxxxx> wrote: >>> On Thu, Dec 7, 2017 at 1:51 AM, Jagan Teki <jagannadh.teki@xxxxxxxxx> wrote: >>>> usb otg on bananapi-m64 has configured with USB-ID with PH9 >>>> and USB-DRVVBUS attached with dcdc1 regulatort. >>> >>> That is not how you read the schematic... >>> >>> Intersecting lines that are tied together will have a dot representing >>> the connection. The DCDC1 line is a pull-up for the ID pin. This is very >>> clear because it has a resistor connected in series. >>> >>> VBUS for OTG is controlled by the IC displayed to the right in the >>> schematic, which is powered from 5V, and controlled by the DRVVBUS >>> pin from the PMIC. Please take a look at how the A31/A33/A83T board >>> dts files represent this. >> >> This is where I confused, USB-DRVVBUS is connected to pin 51 of PMIC >> if we add 5v regulator how can configure gpio number for this? I saw > > From the axp20x bindings: > > - x-powers,drive-vbus-en: boolean, set this when the N_VBUSEN pin is > used as an output pin to control an external > regulator to drive the OTG VBus, rather then > as an input pin which signals whether the > board is driving OTG VBus or not. > (axp221 / axp223 / axp813 only) > > Setting this allows you to use the "drivevbus" regulator under the PMIC. > As I said, look at how other boards are doing it. > >> sun8i-a33-olinuxino.dts which is also similar but it has gpio = <&pio >> 1 9 GPIO_ACTIVE_HIGH>; > > I have no idea where you saw this. It does not exist in my tree. > > Why don't you just trace backwards from the usb0_vbus-supply property > under the usbphy node, and see where it all leads. This what exactly I did, usb0_vbus-supply = <®_drivevbus>; on sun8i-a33-olinuxino.dts is using usb0-vbus from sunxi-common-regulators.dtsi. reg_usb0_vbus regulator using gpio9 which I couldn't find it on schematics. thanks! -- Jagan Teki Free Software Engineer | www.openedev.com U-Boot, Linux | Upstream Maintainer Hyderabad, India.
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