2009-03-25 15:02:22 Increase the SPI Clock Frequency
Anna Neal (UNITED STATES)
Message: 71543
Hello,
I am trying to increase the core clock
frequency with the intention that this will also increase the
SPI clock frequency. Do you know how to achieve this?
Where is the PLL_CTL register initialized?
I am using the BF527.
Currently the CCLK is 525Mhz, we are trying to increase it to
600Mhz.
Thanks in advance,
Anna
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2009-03-25 16:31:56 Increase the SPI Clock Frequency
Michael Hennerich (GERMANY)
Message: 71545 SPI CLK is derived from SCLK and NOT CCLK.
Max SPI CLK is SCLK/4 where max SCLK=133,33MHz
So max SPI SCLK is 33,33MHz.
Take a look here:
docs.blackfin.uclinux.org/doku.php?id=spi
You set SPI CLK by providing a proper value in
struct spi_board_info[]->max_speed_hz