From: Felipe Balbi <balbi@ti.com>
To: Tomoya MORINAGA <tomoya.rohm@gmail.com>
Cc: Felipe Balbi <balbi@ti.com>, Greg Kroah-Hartman <gregkh@suse.de>,
linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org,
qi.wang@intel.com, yong.y.wang@intel.com, joel.clark@intel.com,
kok.howg.ewe@intel.com
Subject: Re: [PATCH 1/3 v2] pch_udc: Detecting VBUS through GPIO
Date: Fri, 3 Feb 2012 09:32:48 +0200 [thread overview]
Message-ID: <20120203073247.GD24297@legolas.emea.dhcp.ti.com> (raw)
In-Reply-To: <1328254526-9447-1-git-send-email-tomoya.rohm@gmail.com>
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Hi,
On Fri, Feb 03, 2012 at 04:35:26PM +0900, Tomoya MORINAGA wrote:
> Problem:
> In USB Suspend, pch_udc handles 'disconnect'.
>
> Root cause:
> The current pch_udc is not monitoring VBUS.
> When USB cable is disconnected, USB Device Controller generates
> an interrupt of USB Suspend.
> pch_udc cannot distinguish it is USB Suspend or disconnect.
> Therefore, pch_udc handles 'disconnect' after an interrupt of
> USB Suspend happend.
>
> Solution:
> VBUS is detected through GPIO.
> After an interrupt produced USB Suspend, if VBUS is Low,
> pch_udc handles 'disconnect'.
> If VBUS is High, pch_udc handles 'suspend'.
>
> Signed-off-by: Tomoya MORINAGA <tomoya.rohm@gmail.com>
Next time, please reply to the v1 of the patch. git send-email has this
--in-reply-to option which helps with that ;-)
--
balbi
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next prev parent reply other threads:[~2012-02-03 7:32 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-03 7:35 Tomoya MORINAGA
2012-02-03 7:32 ` Felipe Balbi [this message]
2012-02-09 7:59 ` Felipe Balbi
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