Hi Russell, On 7 January 2012 23:53, Russell King - ARM Linux <linux@xxxxxxxxxxxxxxxx> wrote: > On Thu, Jan 05, 2012 at 09:12:26PM +0530, Thomas Abraham wrote: >> Add a lcd panel driver for simple raster-type lcd's which uses a gpio >> controlled panel reset. The driver controls the nRESET line of the panel >> using a gpio connected from the host system. The Vcc supply to the panel >> is (optionally) controlled using a voltage regulator. This driver excludes >> support for lcd panels that use a serial command interface or direct >> memory mapped IO interface. > > I'm trying to work out what kind of LCD panel this is for. I assume > not the panels which would be connected to a SoC, which have a parallel > interface to a frame buffer device (LCD controller)? > > If this is for these kinds of LCD panels, how are you handling the > timing required for active panels - some of which must not be powered > up without the LCD controller first being setup and enabled, and must > be powered down before the LCD controller is disabled. > > I've seen this requirement with panels connected to ARM Ltd's development > boards, and also some SoCs. This patch is for passive panels that use a nRESET line controlled by a SoC GPIO and the panel do not use serial command interface (i2c or spi) or memory-mapped-io for panel control. Panels that just need a nRESET to be controlled can be handled by this driver. Thanks, Thomas. -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
 |