Re: [PATCH] ARM: OMAP3: USB: Fix the EHCI ULPI PHY reset issue

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On Fri, Feb 24, 2012 at 3:46 PM, Felipe Balbi <balbi@xxxxxx> wrote:
> Hi,
>
> On Fri, Feb 24, 2012 at 03:36:15PM +0530, Keshava Munegowda wrote:
>> From: Keshava Munegowda <Keshava_mgowda@xxxxxx>
>>
>> It is observed that the echi ports of 3430 sdp board
>> are not working due to the random timing of programming
>> the associated GPIOs of the ULPI PHYs of the EHCI for reset.
>> If the PHYs are reset at during usbhs core driver, host ports will
>> not work because EHCI driver is loaded after the resetting PHYs.
>> The PHYs should be in reset state while initializing the EHCI
>> controller.
>> The code which does the GPIO pins associated with the PHYs
>> are programmed to reset is moved from the USB host core driver
>> to EHCI driver.
>>
>> Signed-off-by: Keshava Munegowda <keshava_mgowda@xxxxxx>
>> Reviewed-by: Partha Basak <parthab@xxxxxxxxxxxx>
>
> won't this cause issues with EHCI/OHCI interactions ? I mean, what if
> you connect a FS/LS device and port is handed over to OHCI, does OHCI
> have any needs to reset the PHY or something similar ?

No, it will not cause any issues with EHCI-OHCI issues.
But its difficult to comment on this because we don't have port
handoff supported
in hardware.

regards
keshava
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