From: Maxime Ripard <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
To: Chen-Yu Tsai <wens-jdAy2FN1RRM@public.gmane.org>
Cc: Mark Kettenis <kettenis-7YlrpqBBQ3VAfugRpC6u6w@public.gmane.org>,
linux-arm-kernel
<linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org>,
devicetree <devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: [PATCH] ARM: dts: sun9i: Enable USB support on Cubieboard4
Date: Mon, 22 Jan 2018 09:38:33 +0100 [thread overview]
Message-ID: <20180122083833.cnjsks3dj3uakcbt@flea.lan> (raw)
In-Reply-To: <CAGb2v66XNAHwAU1eosYjGKgYKkh9YiVEooE9e45RSVvPOvhYLg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
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On Sat, Jan 20, 2018 at 02:12:04PM +0800, Chen-Yu Tsai wrote:
> Maxime,
>
> On Sun, Dec 17, 2017 at 4:58 AM, Mark Kettenis <kettenis-7YlrpqBBQ3VAfugRpC6u6w@public.gmane.org> wrote:
> > On the Cubieboard4 HCI0 is directly connected to a USB connector,
> > and HCI2 is connected to a USB hub on the board. HCI1 is available
> > with HSIC throug 2 pins on the GPIO expansion header, but left
> > disabled just like on the Optimus board.
> >
> > This patch also adds the VBUS regulators.
> >
> > Signed-off-by: Mark Kettenis <kettenis-7YlrpqBBQ3VAfugRpC6u6w@public.gmane.org>
>
> Any thoughts on this patch?
>
> It's similar to what I sent a few years back:
>
> https://patchwork.kernel.org/patch/6359461/
Given the previous discussion, I guess we should have much more
comments on how it is designed.
There was some effort to have power sequence for USB devices described
in the DT here:
https://patchwork.kernel.org/patch/9800887/
I guess pinging Peter to know the current state would be a good way
forward.
> > arch/arm/boot/dts/sun9i-a80-cubieboard4.dts | 36 +++++++++++++++++++++++++++++
> > 1 file changed, 36 insertions(+)
> >
> > diff --git a/arch/arm/boot/dts/sun9i-a80-cubieboard4.dts b/arch/arm/boot/dts/sun9i-a80-cubieboard4.dts
> > index 4024639aa005..e38623265695 100644
> > --- a/arch/arm/boot/dts/sun9i-a80-cubieboard4.dts
> > +++ b/arch/arm/boot/dts/sun9i-a80-cubieboard4.dts
> > @@ -74,6 +74,24 @@
> > };
> > };
> >
> > + reg_usb1_vbus: usb1-vbus {
> > + compatible = "regulator-fixed";
> > + regulator-name = "usb2-drvbus";
> > + regulator-min-microvolt = <5000000>;
> > + regulator-max-microvolt = <5000000>;
> > + enable-active-high;
> > + gpio = <&pio 7 15 GPIO_ACTIVE_HIGH>; /* PH15 */
> > + };
> > +
> > + reg_usb3_vbus: usb3-vbus {
> > + compatible = "regulator-fixed";
> > + regulator-name = "usb1-drvbus";
> > + regulator-min-microvolt = <5000000>;
> > + regulator-max-microvolt = <5000000>;
> > + enable-active-high;
> > + gpio = <&pio 7 14 GPIO_ACTIVE_HIGH>; /* PH14 */
> > + };
You should also have a proper parenthood relationship here, and not
just leave these two regulators hanging around.
Maxime
--
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
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prev parent reply other threads:[~2018-01-22 8:38 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-16 20:58 [PATCH] ARM: dts: sun9i: Enable USB support on Cubieboard4 Mark Kettenis
[not found] ` <20171216205809.5485-1-kettenis-7YlrpqBBQ3VAfugRpC6u6w@public.gmane.org>
2018-01-20 6:12 ` Chen-Yu Tsai
[not found] ` <CAGb2v66XNAHwAU1eosYjGKgYKkh9YiVEooE9e45RSVvPOvhYLg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2018-01-22 8:38 ` Maxime Ripard [this message]
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