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Date: Mon, 24 Sep 2007 12:34:08 +0200 From: Haavard Skinnemoen <hskinnemoen@...el.com> To: linux-fbdev-devel@...ts.sourceforge.net Cc: giometti@...eenne.com, i2c@...sensors.org, linux-kernel@...r.kernel.org, rpurdie@...ys.net Subject: Re: [Linux-fbdev-devel] [RFC] driving a LCD panel via I2C On Mon, 24 Sep 2007 10:58:08 +0200 (CEST) "Rodolfo Giometti" <giometti@...eenne.com> wrote: > Hello, > > I have an LCD panel on a custom PXA27x based board and it must be > turned on/off by some special commands via a GPIO throught a I2C chip. > > I'd like some suggestion about I can easily manage this situation. I have a similar panel in the sense that it needs a bunch of SPI commands to get started. I implemented a LCD driver (drivers/video/backlight) for it so that it is automatically turned on/off at bootup/shutdown, and can be manually turned on/off through /sys/class/lcd/ltv350qv/power. AFAIK the driver is currently sitting in the backlight tree scheduled for inclusion in 2.6.24. > Maybe can I add a special I2C function to get i2c_client pointer and > then using it to send on/off commands to the LCD? Just implement it as a regular I2C chip driver which registers a device with the LCD framework when it is successfully probed. Håvard - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.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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