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imx6sx ; How does Linux change the BCLK frequency ?

Question asked by Bruce Parker on Apr 6, 2016
Latest reply on Apr 7, 2016 by Biyong Sun

I am setting the BCLK to continuous mode in u-boot, and setting the EIM_SLOW_PODF bits in CSCMR1 to get a 66Mhz external BCLK frequency. When I stop u-boot from booting Linux, then I see the expected 66Mhz clock.

However, once Linux boots the clock gets changed to 133Mhz. Is this controlled by the device tree?

If so, can someone provide the required change to reduce this frequency?

 

Thanks

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