[U-Boot] [PATCH 3/8] pxa_lcd: allow L_BIAS line to be unused
Marek Vasut
marex at denx.de
Mon Apr 8 07:28:06 CEST 2013
Dear Mike Dunn,
> This patch adds a config option CONFIG_SYS_LCD_PXA_NO_L_BIAS, which causes
> the lcd controller initialization code to leave as an ordinary gpio the
> line that is typically configured as the lcd L_BIAS alternate function
> (this is the gpio 77 line).
>
> For some reason (I don't have a datasheet), the lcd device on the
> palmtreo680 board does not use the L_BIAS line. PalmOS does not configure
> the gpio 77 line for the L_BIAS alternate function, and if it is
> configured as such, the lcd does not work.
>
> Signed-off-by: Mike Dunn <mikedunn at newsguy.com>
The other option would be to pull the GPIO setup from the driver. That'd be the
best.
Best regards,
Marek Vasut
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