Max. recommended SPI0 clock frequency on OMAP L138

Hi,

We are using an OMAP L138 based custom board. I have noticed that both UBL and UBoot we are using sets the clock frequency for SPI0 to 30MHz. I have seen in a TI spec. that the maximum recommended clock frequency for SPI bus is 20 MHz. We have not modified this setup and the clock setup is as provided by TI as part of UBL and UBoot. Just wanted to ask if this recommendation is valid and if we shall set the clock frequency down to 20 MHz.

Thanks in advance for your support.

Regards,

Ömer