From: matthieu.castet@parrot•com (Matthieu CASTET)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH 2/3] at91-ohci: support overcurrent notification
Date: Tue, 5 Jul 2011 12:12:54 +0200 [thread overview]
Message-ID: <4E12E3A6.3040902@parrot.com> (raw)
In-Reply-To: <1309856728-8265-2-git-send-email-thomas.petazzoni@free-electrons.com>
Thomas Petazzoni a ?crit :
> Several USB power switches (AIC1526 or MIC2026) have a digital output
> that is used to notify that an overcurrent situation is taking
> place. This digital outputs are typically connected to GPIO inputs of
> the processor and can be used to be notified of those overcurrent
> situations.
>
> Therefore, we add a new overcurrent_pin[] array in the at91_usbh_data
> structure so that boards can tell the AT91 OHCI driver which pins are
> used for the overcurrent notification. The AT91 OHCI driver simply
> registers an interrupt handler which will log the entry and exit of an
> overcurrent situation in the kernel logs.
>
Why don't you forward the overcurrent notification to the usb stack ?
A printk is quite useless.
Matthieu
next prev parent reply other threads:[~2011-07-05 10:12 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-05 9:05 [PATCH 1/3] ohci-at91: add vbus_pin_inverted platform attribute Thomas Petazzoni
2011-07-05 9:05 ` [PATCH 2/3] at91-ohci: support overcurrent notification Thomas Petazzoni
2011-07-05 10:12 ` Matthieu CASTET [this message]
2011-07-05 10:18 ` Thomas Petazzoni
2011-07-05 12:18 ` Matthieu CASTET
2011-07-05 14:23 ` Jean-Christophe PLAGNIOL-VILLARD
2011-07-05 9:05 ` [PATCH 3/3] at91-ohci: configure overcurrent pins as GPIOs Thomas Petazzoni
2011-07-05 11:39 ` [PATCH 1/3] ohci-at91: add vbus_pin_inverted platform attribute Sergei Shtylyov
2011-07-05 11:54 ` Thomas Petazzoni
-- strict thread matches above, loose matches on Subject: below --
2011-07-13 9:29 [PATCH v2] AT91 OHCI active-high vbus and overcurrent handling Thomas Petazzoni
2011-07-13 9:29 ` [PATCH 2/3] at91-ohci: support overcurrent notification Thomas Petazzoni
2011-07-13 14:28 ` Thomas Petazzoni
2011-07-13 15:54 ` Alan Stern
2011-07-13 16:43 ` Thomas Petazzoni
2011-07-13 17:17 ` Alan Stern
2011-09-07 10:47 ` Nicolas Ferre
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