From: swarren@wwwdotorg•org (Stephen Warren)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH v2 2/2] USB: doc: Binding document for ehci-platform driver
Date: Wed, 24 Oct 2012 10:48:35 -0600 [thread overview]
Message-ID: <50881BE3.9020702@wwwdotorg.org> (raw)
In-Reply-To: <Pine.LNX.4.44L0.1210241238570.1282-100000@iolanthe.rowland.org>
On 10/24/2012 10:44 AM, Alan Stern wrote:
> On Wed, 24 Oct 2012, Stephen Warren wrote:
>
>> We should absolutely avoid Linux-specific properties where possible.
>>
>> That said, what Linux-specific properties are you talking about? The
>> properties discussed here (has-synopsys-hc-bug, no-io-watchdog, has-tt)
>> are all purely a description of HW, aren't they.
>
> "has-tt" is definitely a description of the HW.
OK.
> "has-synopsys-hc-bug" is too, although determining whether or not it
> should apply to a particular controller might be difficult. I'm
> inclined not to include it among the properties.
>
> "no-io-watchdog" is not the greatest name. It describes to controllers
> that always do generate IRQs for I/O events when they are supposed to
> (and hence the driver doesn't need to set up a watchdog timer to detect
> I/O completions that didn't generate an IRQ). So while the concept is
> HW-specific, the name refers to a driver implementation issue. A
> better name might be something like "reliable-IRQs". Again, it's not
> such an easy thing to test for. Almost all the existing drivers leave
> it unset.
OK, I'd be inclined to drive those last two by quirks then, since they
aren't architectural features of EHCI but rather implementation issues.
And indeed have the quirk table have a "reliable IRQs" field instead of
"no IO watchdog", to minimize the table size.
next prev parent reply other threads:[~2012-10-24 16:48 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-20 22:10 [PATCH v2 0/2] Update ehci-platform driver to support devicetree Tony Prisk
2012-10-20 22:10 ` [PATCH v2 1/2] USB: Update EHCI-platform driver to devicetree Tony Prisk
2012-10-21 2:02 ` Alan Stern
2012-10-20 22:10 ` [PATCH v2 2/2] USB: doc: Binding document for ehci-platform driver Tony Prisk
2012-10-21 17:34 ` Florian Fainelli
2012-10-22 16:07 ` Stephen Warren
2012-10-22 17:34 ` Alan Stern
2012-10-22 17:48 ` Stephen Warren
2012-10-22 19:00 ` Alan Stern
2012-10-22 22:10 ` Stephen Warren
2012-10-23 14:10 ` Alan Stern
2012-10-23 16:15 ` Stephen Warren
2012-10-23 17:59 ` Alan Stern
2012-10-23 18:47 ` Stephen Warren
2012-10-23 19:33 ` Alan Stern
2012-10-23 20:06 ` Rob Herring
2012-10-24 14:57 ` Alan Stern
2012-10-24 15:26 ` Sebastian Andrzej Siewior
2012-10-24 16:16 ` Stephen Warren
2012-10-24 16:36 ` Florian Fainelli
2012-10-24 16:38 ` Alan Stern
2012-10-24 16:44 ` Florian Fainelli
2012-10-24 18:04 ` Alan Stern
2012-10-24 18:18 ` Florian Fainelli
2012-10-24 16:45 ` Stephen Warren
2012-10-24 17:46 ` Alan Stern
2012-10-24 18:09 ` Stephen Warren
2012-10-24 18:55 ` Mitch Bradley
2012-10-24 19:30 ` Alan Stern
2012-10-25 10:23 ` Sebastian Andrzej Siewior
2012-10-25 14:36 ` Alan Stern
2012-10-26 8:02 ` Sebastian Andrzej Siewior
2012-10-26 14:54 ` Alan Stern
2012-10-25 15:53 ` Stephen Warren
2012-10-24 19:41 ` Alan Stern
2012-10-24 16:44 ` Alan Stern
2012-10-24 16:48 ` Stephen Warren [this message]
2012-10-24 17:42 ` Rob Herring
2012-10-24 17:57 ` Alan Stern
2012-10-24 16:28 ` Stephen Warren
2012-10-24 16:54 ` Alan Stern
2012-10-24 17:37 ` Florian Fainelli
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