Hi,
On Wed, Apr 06, 2011 at 11:22:13, Ran Shalit wrote:
> Hello,
>
> I am trying to understand the logic behind the implementation of SPI
> interface, and came across a validity routine (for different baords it is
> about the same):
>
> for Atmel and Davinci for example:
>
> int spi_cs_is_valid(unsigned int bus, unsigned int cs) { return bus == 0 &&
> cs == 0; }
>
> Althout atmel and davinci can have more then one spi port, it seems that they
> will fail in configuration if bus is different then 0.
> I wander if any one can solve this issue for me.
>
It seems that currently both atmel & davinci boards supports only 1 spi
instance at a time.
In order to support different spi instances,
In case of atmel declare SPIx_BASE as required & set CONFIG_DEFAULT_SPI_BUS to
required bus
In case of davinci set CONFIG_SYS_SPI_BASE to base address of required spi
instance
Also, spi_cs_is_valid() function needs to be updated to support different spi
instances. spi_cs_is_valid() function is board dependednt.
Hope this helps.
Regards,
Gururaja
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