linux-kernel - Re: [Projekt-wlan] Regression in 3735ba8db8e6ea22ad3ff524328926d8d780a884 with Freescale P1020

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Date:	Thu, 18 Apr 2013 17:13:39 +0200
From:	michael-dev <michael-dev@...i-braun.de>
To:	Shengzhou Liu <Shengzhou.Liu@...escale.com>
Cc:	<projekt-wlan@....tu-ilmenau.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	<linux-usb@...r.kernel.org>,
	Alan Stern <stern@...land.harvard.edu>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [Projekt-wlan] Regression in
 3735ba8db8e6ea22ad3ff524328926d8d780a884 with Freescale P1020

Hi,

thanks for the quick reply.

> Please review the patch http://patchwork.ozlabs.org/patch/237201/
I applied it, but it does not make any difference on my platform.

Regards,
  M. Braun

Am 17.04.2013 12:53, schrieb Liu Shengzhou-B36685:
> Hi Braun,
> 
> It seems the duplicated tdi_reset caused the PHY_CLK_VALID bit 
> unstable,
> introduced by patch "EHCI: centralize controller initialization".
> I submitted a patch to fix it.
> Please review the patch http://patchwork.ozlabs.org/patch/237201/
> 
> Regards,
> Shengzhou
> 
> 
>> -----Original Message-----
>> From: Michael Braun [mailto:michael-dev@...i-braun.de]
>> Sent: Wednesday, April 17, 2013 6:08 PM
>> To: Liu Shengzhou-B36685
>> Cc: Alan Stern; projekt-wlan@....tu-ilmenau.de; Greg Kroah-Hartman;
>> linux-usb@...r.kernel.org; linux-kernel@...r.kernel.org
>> Subject: Regression in 3735ba8db8e6ea22ad3ff524328926d8d780a884 with
>> Freescale P1020
>> 
>> Hi,
>> 
>> I'm running OpenWRT Kernel 3.8.3 (which already has
>> f66dea709cd9309b2ee9f715697818001fb518de and
>> 5ed338778f917a035f0f0a52327fc4f72e36f7a1 applied) on a P1020WLAN 
>> (QorlQ,
>> PPC) device.
>> Before updating the kernel from 3.3.0, USB host support was working 
>> fine.
>> Now I get "fsl-ehci: USB PHY clock invalid" messages in dmesg and the
>> lsusb output is empty, so USB host support is not working. When I 
>> apply
>> the following patch, USB host support starts working again, so I 
>> guess
>> 3735ba8db8e6ea22ad3ff524328926d8d780a884 is the cause.
>> Do you have an idea how to fix it more appropriately?
>> 
>> Thanks,
>>   M. Braun
>> 
>> --- a/drivers/usb/host/ehci-fsl.c       2013-04-15 21:13:52.924403077
>> +0200
>> +++ b/drivers/usb/host/ehci-fsl.c       2013-04-15 21:13:57.572410838
>> +0200
>> @@ -273,7 +273,6 @@ static int ehci_fsl_setup_phy(struct usb
>>                  if (!spin_event_timeout(in_be32(non_ehci +
>> FSL_SOC_USB_CTRL) &
>>                                  PHY_CLK_VALID, 
>> FSL_USB_PHY_CLK_TIMEOUT,
>> 0)) {
>>                          printk(KERN_WARNING "fsl-ehci: USB PHY clock
>> invalid\n");
>> -                       return -EINVAL;
>>                  }
>>          }
>> 
--
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