From: Mark Jackson Date: Wed, 14 Aug 2013 10:29:38 +0000 (+0100) Subject: OMAP: add RS485 support X-Git-Tag: v3.12-rc1~182^2~57 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4a0ac0f55b18dc297a87a85417fcf068658bf103;p=pandora-kernel.git OMAP: add RS485 support This patch adds RS485 support to the OMAP serial driver, as defined in:- Documentation/devicetree/bindings/serial/rs485.txt When a UART transmitter is connected to (eg) a RS485 driver, it is necessary to turn the driver on/off as quickly as possible. This is best achieved in the serial driver itself (rather than in userspace where the latency can be quite large). This patch allows a GPIO pin to be defined (via DT) that controls the enabling of the driver at the start of a message, and disables the driver when the message has been completed. When RS485 is disabled, the RTS pin is set to on. Signed-off-by: Mark Jackson Signed-off-by: Greg Kroah-Hartman --- Reading git-diff-tree failed