Messages in this thread | | | Date | Fri, 3 Sep 2004 15:17:15 +0200 | From | Robert Schwebel <> | Subject | Re: [PATCH 2.6.8.1 0/2] leds: new class for led devices |
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John,
On Thu, Sep 02, 2004 at 08:33:10PM +0000, John Lenz wrote: > This is an attempt to provide an alternative to the current arm > specific led interface. This arm interface does not integrate well > with the device model and sysfs.
I have written a GPIO device class driver for the same purpose; before this goes into the kernel I think we should try to merge your attempts with mine.
On embedded systems you normally have several things which are similar to LEDs; embedded processors have quite a lot of general purpose I/O pins. Normally you want some of the pins being used from userspace (like 'echo 1 > /sys/class/gpio/gpio5/level'), others are used from device drivers. My framework offers a request_gpio() function similar to request_gpio(), so the kernel can administrate these ressources.
I suppose it is not too difficult to unify our drivers in a way that the base mechanism is more abstract then LEDs (a GPIO pin can also represent a power switch or whatever) and still can support your LED levels.
I'll pull the gpio patch out of my working tree and post it here for discussion.
Robert -- Dipl.-Ing. Robert Schwebel | http://www.pengutronix.de Pengutronix - Linux Solutions for Science and Industry Handelsregister: Amtsgericht Hildesheim, HRA 2686 Hornemannstraße 12, 31137 Hildesheim, Germany Phone: +49-5121-28619-0 | Fax: +49-5121-28619-4 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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