maximum SPI Slave clock rate

Safir
Hello, can anyone know a maximum speed of SPI in slave mode? I think that
the max. input (SPI slave) and output (SPI master) clock rate can not  be
the same, but there is absolutely no information about it in the S3C2440's
user manual.

/* earlier, for example, i used nxp LPC2478 cpu, and its user manual
specified, that maximum SPI clock rate in slave mode, is equal 1/12 of the
SPI peripheral clock (1:1 divisor, 72/12=6 MHz).  */

Thanks.