On Mon, Mar 12, 2012 at 02:19:25PM -0400, simon@xxxxxxxxxxxxx wrote: > > On Mon, Mar 12, 2012 at 02:04:14PM -0400, simon@xxxxxxxxxxxxx wrote: > >> At the moment you'd just drive the LEDs simply, ie: > >> $ echo 31 > /sys/bus/hid/devices/.../leds > > Shouldn't this be using the LED subsystem the kernel already has? > The LED subsystem appears to be aim at controller chips (ie. lp3944) which > are connected to a bus (I2C) in a generalised form. I guess people might > be doing 'blinken light' type systems. Not really, it's aimed at supporting LEDs in general. Obviously most of the drivers are for specific controller chips which makes them more visible but there's also things like the triggers. > The LEDs on the G27 are very much more specific, mounted on the yoke of > the gaming wheel. > Would this require the use/complexity of the LED subsystem? Well, it'd mean that applications that know how to drive LEDs will be able to use the LEDs on this wheel with less per device knowledge which seems like a useful thing and if someone wants to remap a LED to "new mail" or whatever that'll be easier (nethack has the mailer daemon deliver a scroll of mail!).
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