How to keep Mclk from Sai1 always on?

[lucas_tanure]

Hi, 

I need MCLK from SAI1 to be output and always, even without use of SAI1 bus.

Because the Codec needs the clock to boot and if SAI1 only enables MCLK just before the use of SAI1 the codec doesn't boot.

During boot the kernel also needs to read the ID of the codec by regmap, which needs to boot the device, which needs MCLK. 

How can I configure MCLK1 to be always on since boot? 

Thanks

Lucas

[igorpadykov]

Hi Lucas

I am afraid there is no way to have SAI MCLK to be always on without loading

driver. One can try to use for such purpose CCM CLKO1,2 signals

described in sect.18.6.21 CCM Clock Output Source Register (CCM_CCOSR)

i.MX 6UltraLite Applications Processor Reference Manual

Best regards
igor
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