[PATCH v7] OpenRD: Enable SD/UART selection for serial port 1

[Alexander Clouter]

* Tanmay Upadhyay <tanmay.upadhyay at einfochips.com> [2010-08-26 11:11:58+0530]:
>
> This patch enables users to choose either the SDIO interface or UART1
> (RS232/RS485). The selection can be done through kernel parameter.
> 
> By default the port would be used for SDIO interface. Passing the string
> "kw_openrd_init_uart1=232" or "kw_openrd_init_uart1=485" enables either
> the RS-232 or RS-485 port respectively; disabling the SDIO interface.
> Anything else selects the default SDIO interface.
> 
> "kw_openrd_init_uart1=485" is ignored on OpenRD-Base as it doesn't
> have RS485 port.
> 
> v2 - use gpio* functions instead of read/write to set/reset GPIO
> v3 - notify user when wrong kernel paramter is passed
> v4 - use linux/gpio.h instead of mach/gpio.h
> v5 - changed uart1_mpp_config to be static, global & __initdata
> v6 - changed kernel parameter to 'kw_openrd_init_uart1=...' from 'uart=...'
> v7 - remove compilation error due to same name used for variable & function
> 
> Signed-off-by: Tanmay Upadhyay <tanmay.upadhyay at einfochips.com>
>
Acked-by: Alexander Clouter <alex at digriz.org.uk>

Cheers

-- 
Alexander Clouter
.sigmonster says: Experience varies directly with equipment ruined.