linux-kernel - Re: [PATCH] ARM: dts: sun6i: sina31s: Enable USB OTG controller in peripheral mode

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Date:   Wed, 18 Jan 2017 08:11:06 +0100
From:   Maxime Ripard <maxime.ripard@...e-electrons.com>
To:     Chen-Yu Tsai <wens@...e.org>
Cc:     devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-sunxi@...glegroups.com
Subject: Re: [PATCH] ARM: dts: sun6i: sina31s: Enable USB OTG controller in
 peripheral mode

On Wed, Jan 18, 2017 at 09:01:05AM +0800, Chen-Yu Tsai wrote:
> While the SinA31s does have a proper 5-pin mini USB OTG port, the ID
> pin does not seem to work. The pin used in the schematics is always low,
> regardless of the attached OTG cable or SoC internal pin bias settings.
> 
> The v1.5 board is missing bias resistors shown in the schematics for
> earlier revisions, and the connections of the remaining one does not
> match the schematics either.
> 
> In addition, VBUS for this port is disconnected from the board's 5V
> power rail. The board features a pad to solder jumper pins to connect
> VBUS to 5V manually.
> 
> Given the above and the fact that the board has 5 more USB host ports,
> it makes more sense to have the OTG port work in peripheral mode.
> 
> Signed-off-by: Chen-Yu Tsai <wens@...e.org>

Applied, thanks!
Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com

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