Re: usbtouchscreen: Add support for Zytronic capacitive touchscreen

[Ben Dooks <ben-linux@fluff.org>]

On Wed, Jan 14, 2009 at 05:36:53PM +0000, Daniel Silverstone wrote:
> On Tue, 2009-01-13 at 21:35 -0800, Dmitry Torokhov wrote:
> > > As I understand it; yes. (Some bits of hardware really are hideous
> > > things) Indeed if the driver fails to load quickly enough, the device
> > > might disconnect/reconnect before the driver can get hold of it.
> > Geez... you sure it wasn't just broken device/batch?
> 
> Nope, the datasheet proudly proclaims this watchdog functionality.

Would be useful to add a comment about that being the primary function
for the irq_always flag, ie:

+       /* Always service the USB devices irq not just when the input device is
+        * open. This is often for devices that have a watchdog which watches
+	 * the polling process.
+        */
 
> > > Unfortunately it's often harder to get people to change their userland
> > > than their kernel. It seems a pity to make the driver less useful during
> > > any longer-term effort to fix TSLIB. If acceptance of this patch is
> > > predicated on removing that then I guess we'll have to discuss it
> > > amongst ourselves and try and work out what we'd rather do. Is removing
> > > the fake pressure report a requirement or a would-like?
> > I just checked TSLIB and the change to recognize devices that do not
> > report pressure was applied 2 months ago so everything should work fine
> > now. I do not think that we need to implement workarounds in newly
> > added drivers just because users are not willing to upgrade their
> > TSLIB installation.
> 
> I see. I shall look into sorting out a fresh patch without fake
> pressure.

-- 
Ben

Q:      What's a light-year?
A:      One-third less calories than a regular year.