From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marek Vasut Date: Mon, 8 Apr 2013 07:28:06 +0200 Subject: [U-Boot] [PATCH 3/8] pxa_lcd: allow L_BIAS line to be unused In-Reply-To: <1365352865-2137-4-git-send-email-mikedunn@newsguy.com> References: <1365352865-2137-1-git-send-email-mikedunn@newsguy.com> <1365352865-2137-4-git-send-email-mikedunn@newsguy.com> Message-ID: <201304080728.06230.marex@denx.de> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de 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 The other option would be to pull the GPIO setup from the driver. That'd be the best. Best regards, Marek Vasut