linux-kernel - Re: [PATCH 2/3] arm64: allwinner: a64: add USB0 OHCI/EHCI related devicetree parts

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Date:   Wed, 5 Apr 2017 15:33:09 +0800
From:   Icenowy Zheng <icenowy@...c.io>
To:     Maxime Ripard <maxime.ripard@...e-electrons.com>
Cc:     Chen-Yu Tsai <wens@...e.org>,
        Kishon Vijay Abraham I <kishon@...com>,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-sunxi@...glegroups.com
Subject: Re: [PATCH 2/3] arm64: allwinner: a64: add USB0 OHCI/EHCI related
 devicetree parts



在 2017年04月05日 15:26, Maxime Ripard 写道:
> On Wed, Apr 05, 2017 at 03:17:19PM +0800, Icenowy Zheng wrote:
>>
>>
>> 在 2017年04月05日 15:15, Maxime Ripard 写道:
>>> On Wed, Apr 05, 2017 at 02:45:17AM +0800, Icenowy Zheng wrote:
>>>> As we added USB0 route auto switching support for A64, add related
>>>> device tree parts to the A64 DTSI file (EHCI0/OHCI0 controllers and the
>>>> pmu0 memory area for PHY).
>>>>
>>>> Signed-off-by: Icenowy Zheng <icenowy@...c.io>
>>>> ---
>>>>  arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi | 24 ++++++++++++++++++++++++
>>>>  1 file changed, 24 insertions(+)
>>>>
>>>> diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
>>>> index 1c64ea2d23f9..a8916df99048 100644
>>>> --- a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
>>>> +++ b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
>>>> @@ -179,8 +179,10 @@
>>>>  		usbphy: phy@...19400 {
>>>>  			compatible = "allwinner,sun50i-a64-usb-phy";
>>>>  			reg = <0x01c19400 0x14>,
>>>> +			      <0x01c1a800 0x4>,
>>>>  			      <0x01c1b800 0x4>;
>>>>  			reg-names = "phy_ctrl",
>>>> +				    "pmu0",
>>>
>>> This breaks the older DTs, and that property isn't documented.
>>
>> It's already documented.
>>
>> In the H3 dual-route patchset I have already added this.
>>
>> ("  * "pmu0" for H3, V3s and A64")
>
> This is not in linux-next then, sorry.

It's already in next-20160405.

>
>> P.S. to be compatible with older DTs, I think I should adjust
>> the phy driver, make it enable dual-route function only when
>> pmu0 is present.
>
> That, or if we're quick enough, we can still add it to 4.11. There's a
> bit of time left.

Thus the device tree binding patch and the DT part of this patchset
should be all pushed to 4.11 .

The device tree binding patch is commit ee73fd7dfc86 ("dt: bindings: add 
pmu0 regs for USB PHYs on Allwinner H3/V3s/A64").

>
> Maxime
>