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