[PATCH 1/3] dt-bindings: phy: phy-rockchip-typec: add usb3 otg reset

wlf wulf at rock-chips.com
Mon Feb 12 08:40:31 PST 2018

Dear Heiko,

在 2018年02月11日 03:55, Heiko Stuebner 写道:
> Hi Wulf,
> Am Montag, 22. Januar 2018, 12:33:05 CET schrieb wlf:
>> 在 2018年01月20日 05:49, Rob Herring 写道:
>>> On Thu, Jan 18, 2018 at 09:47:50AM -0800, Brian Norris wrote:
>>>> On Thu, Jan 18, 2018 at 06:20:09PM +0100, Enric Balletbo Serra wrote:
>>>>> As Brian said commit 06c47e6286d5 'usb: dwc3: of-simple: Add support
>>>>> to get resets for the device' introduced the support to get the resets
>>>>> from dwc3-of-simple and the queued commit 'b7e63d95c14d arm64: dts:
>>>>> rockchip: add reset property for dwc3 controllers on rk3399' started
>>>>> using it. Without the latest I get errors like this doing bind/unbind
>>>>> tests.
>>>>>      dwc3: probe of fe900000.dwc3 failed with error -110
>>>>> I just tested these series on top of mainline, I reverted my patch
>>>>> because otherwise two drivers are requesting the same reset and fails,
>>>>> and I did some of the bind/unbind test. They just worked fine, and
>>>>> seems that this is right way, so this makes me think some questions.
>>>> Actually, this was intended to coexist with DWC3 optionally controlling
>>>> the same reset. It was written before the reset framework was rewritten
>>>> to have shared and exclusive resets. Should this be rewritten to use
>>>> shared resets? We'd have to modify both dwc3 core and the PHY driver.
>>> Seems like abuse of DT to me. If you need to control the controller's
>>> reset from the phy driver, then get the reset out of the controller
>>> node. The phy node should describe the connections to the phy.
>> I try to get the reset out of the controller, but I don't find a good
>> way to get the reset ofthe controller associated with the given phy
>> device node.  Is there an API like theof_usb_get_dr_mode_by_phy() to
>> get 'dr_mode' of the controller?
> I guess the easiest way would be taking the of_usb_get_dr_mode_by_phy()
> function move the part above the "finish" label into a separate function
> like of_usb_get_node_by_phy (or possibly move that to an even more general
> place as it is not usb-related at all) and use that function in
> of_usb_get_dr_mode_by_phy() and also use it to get the reset you want via
> something like:
> node = of_usb_get_node_by_phy(...);
> rst = of_reset_control_get(node, ...);
Thanks for your good suggestion. I think it's a good way to get the 
reset of the
controller by phy.
>> And we're trying to find another method to fix the RK3399 tcphy power
>> on fail issue.If we get another proper method, we may not need these
>> phy patch series.
> Did you find any different solution for that yet?
> Heiko
Yes, finally, we have found another way to fix the  RK3399 tcphy usb power
on fail issue. And Enric Balletbo i Serra <Enric Balletbo i Serra> has 
new patch series, refer to the following patches:

So my patches can be abandoned.

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