tree 5ab17a8ab0f6397a852d51cf48ba955b2b9b0c32
parent e023328fa3a65c8109665e4340bff43ef0cc739f
author Mayank Rana <mrana@codeaurora.org> 1354628436 +0530
committer Mayank Rana <mrana@codeaurora.org> 1355886188 +0530

msm_serial_hs_lite: Add support to use 4-wire UART

GSBI based UART is used in shared mode. Hence this driver only
supports configuring Tx and Rx GPIOs with configuring GSBI control
register with I2C/UART Shared mode protocol.
Add support in this driver for 4-wire UART related configuration
i.e.GPIOs (i.e. Tx, Rx, CTS, RFR signal lines) and programming
GSBI control register with UART mode protocol.

4-wire UART related configuration is done based on platform data
variable config_gpio.
For 4-wire UART, set config_gpio as 4 to configre all 4 GPIOs.
For 2-wire UART, set config_gpio as 1 to configure only Tx and Rx
GPIOs.

Also document added new pdata and their usage with device tree.

CRs-Fixed: 430725
Change-Id: I9236c63778406f004a96d782a4614cb5db46755c
Signed-off-by: Mayank Rana <mrana@codeaurora.org>