From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Roger Quadros <rogerq@ti.com>
Cc: Michael Trimarchi <michael@amarulasolutions.com>,
Felipe Balbi <balbi@ti.com>,
lee.jones@linaro.org, sameo@linux.intel.com,
tomi.valkeinen@ti.com, Stefan Roese <sr@denx.de>,
ljkenny.mailinglists@gmail.com,
Linux OMAP Mailing List <linux-omap@vger.kernel.org>,
USB list <linux-usb@vger.kernel.org>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/1] mfd: omap-usb-host: Fix USB device detection problems on OMAP4 Panda
Date: Mon, 02 Dec 2013 13:01:51 +0100 [thread overview]
Message-ID: <529C76AF.10106@linutronix.de> (raw)
In-Reply-To: <529C55DF.3000808@ti.com>
- stable@vger.kernel.org since they probably don't care about this
unless the patch is merged.
On 12/02/2013 10:41 AM, Roger Quadros wrote:
> Michael,
>
> On 11/29/2013 05:32 PM, Michael Trimarchi wrote:
>> Hi Roger
>>
>> On Fri, Nov 29, 2013 at 2:01 PM, Roger Quadros <rogerq@ti.com> wrote:
>>> With u-boot 2013.10, USB devices are sometimes not detected
>>> on OMAP4 Panda. To make us independent of what bootloader does
>>> with the USB Host module, we must RESET it to get it to a known
>>> good state. This patch Soft RESETs the USB Host module.
>>>
>>
>> Do you think that we need something similar of usb musb?
>> I have seen the OTG_SYSCONFIG is touched in uboot and
>> only readed in omap2430.c.
>
> I'm not sure about musb. Maybe Sebastian/Felipe have better idea.
> In general I believe that all modules must be reset by the kernel.
>
based on the code at the bottom it touches the first few register(s)
sysconfig. Isn't hwmod actually doing this idle stuff and resting the
device during boot?
> cheers,
> -roger
>>
Sebastian
next prev parent reply other threads:[~2013-12-02 12:02 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-29 13:01 [PATCH 0/1] mfd: omap-usb-host: Bug fix for 3.13 rc Roger Quadros
2013-11-29 13:01 ` [PATCH 1/1] mfd: omap-usb-host: Fix USB device detection problems on OMAP4 Panda Roger Quadros
2013-11-29 13:17 ` David Laight
2013-12-02 8:39 ` Roger Quadros
2013-12-02 16:28 ` David Laight
2013-12-03 9:43 ` Roger Quadros
2013-11-29 15:32 ` Michael Trimarchi
2013-12-02 9:41 ` Roger Quadros
2013-12-02 12:01 ` Sebastian Andrzej Siewior [this message]
2013-12-02 12:12 ` Roger Quadros
2013-12-02 13:04 ` Sebastian Andrzej Siewior
2013-12-02 13:35 ` Roger Quadros
2013-12-02 13:39 ` Sebastian Andrzej Siewior
2013-12-02 13:44 ` Roger Quadros
2013-12-02 14:03 ` Sebastian Andrzej Siewior
2013-12-02 15:12 ` Roger Quadros
2013-11-30 4:48 ` Michael Trimarchi
2013-11-30 5:10 ` Michael Trimarchi
2013-12-01 3:14 ` Michael Trimarchi
2013-12-02 9:39 ` Roger Quadros
2013-12-02 9:51 ` Michael Trimarchi
2013-12-02 12:05 ` Roger Quadros
2013-12-02 15:00 ` Paul Walmsley
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