[PATCH] ARM: OpenRD base: Initialize PCI express, i2c and UART 1

[dhaval.vasa@einfochips.com (Dhaval Vasa)]

Simon Kagstrom wrote:
> On Wed, 26 Aug 2009 09:42:30 +0200
> Simon Kagstrom <simon.kagstrom@netinsight.net> wrote:
> 
>> ARM: OpenRD base: Initialize PCI express, i2c and UART 1
> 
>> diff --git a/arch/arm/mach-kirkwood/openrd_base-setup.c b/arch/arm/mach-kirkwood/openrd_base-setup.c
>> index f9a2166..003db06 100644
>> --- a/arch/arm/mach-kirkwood/openrd_base-setup.c
>> +++ b/arch/arm/mach-kirkwood/openrd_base-setup.c
>> @@ -64,6 +64,7 @@ static void __init openrd_base_init(void)
>>  	kirkwood_mpp_conf(openrd_base_mpp_config);
>>  
>>  	kirkwood_uart0_init();
>> +	kirkwood_uart1_init();
> 
> After looking at the openrd design I realised that this might not be
> such a hot idea. The UART1 pins are multiplexed with the SD card, so
> I'm not sure what happens if you have both of these initialized at the
> same time.
> 
> Anyone knows how Kirkwood behaves when on-board devices use pins which
> are multiplexed for something else?
> 

On Marvell LSP, default SD card is selected; and user has an option of 
selecting UART (either RS-232 or RS-485) using command line argument and 
u-boot environment variable.

Even if you initialize both at the same time, there is no issue as 
selection of SD/UART1 is based on MPP (GPIO) pin - 28, 34.

I am working on patch to add SD/UART1 selection for in-tree.  So, you 
can keep this init routine.

- Dhaval
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