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SubjectRe: [PATCH 2/2] arm64: allwinner: a64: bananapi-m64: add usb otg
On Thu, Dec 7, 2017 at 8:54 AM, Chen-Yu Tsai <wens@csie.org> wrote:
> On Thu, Dec 7, 2017 at 1:51 AM, Jagan Teki <jagannadh.teki@gmail.com> 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
sun8i-a33-olinuxino.dts which is also similar but it has gpio = <&pio
1 9 GPIO_ACTIVE_HIGH>;

thanks!
--
Jagan Teki
Free Software Engineer | www.openedev.com
U-Boot, Linux | Upstream Maintainer
Hyderabad, India.

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