linux-kernel - Re: [PATCH 2/6] ARM: sun8i: r40: add USB host port nodes for R40

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Date:   Wed, 18 Oct 2017 20:21:36 +0800
From:   icenowy@...c.io
To:     Maxime Ripard <maxime.ripard@...e-electrons.com>
Cc:     devicetree@...r.kernel.org, linux-sunxi@...glegroups.com,
        linux-kernel@...r.kernel.org, Chen-Yu Tsai <wens@...e.org>,
        Icenowy Zheng <icenowy@...c.xyz>,
        Kishon Vijay Abraham I <kishon@...com>,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 2/6] ARM: sun8i: r40: add USB host port nodes for R40

在 2017-10-16 20:06，Maxime Ripard 写道：
> On Mon, Oct 16, 2017 at 05:39:58PM +0800, icenowy@...c.io wrote:
>> 在 2017-10-16 17:32，Maxime Ripard 写道：
>> > On Tue, Oct 10, 2017 at 07:24:28AM +0800, Icenowy Zheng wrote:
>> > > >> +			interrupts = <GIC_SPI 76 IRQ_TYPE_LEVEL_HIGH>;
>> > > >> +			clocks = <&ccu CLK_BUS_OHCI1>,
>> > > >> +				 <&ccu CLK_BUS_EHCI1>,
>> > > >> +				 <&ccu CLK_USB_OHCI1>;
>> > > >> +			resets = <&ccu RST_BUS_OHCI1>,
>> > > >> +				 <&ccu RST_BUS_EHCI1>;
>> > > >
>> > > >Why do you need to take the OHCI resources too?
>> > >
>> > > AW's strange design -- without OHCI resources taken EHCI
>> > > won't work.
>> >
>> > How has this been tested?
>> 
>> As EHCI is probed before OHCI, this behavior is easy to
>> appear if the OHCI resources are removed.
> 
> And what is "this behaviour" exactly?
> 
> What have you tested, what device did you connect, what is the outcome
> that isn't something you expected, etc.

Oh sorry this weird behavior doesn't exist on R40, although it do exist
on H3/H5/A64.

I will fix this in the next version.

> 
> Maxime