I have to add Shawn for help :)
On Fri, Aug 14, 2015 at 03:38:16PM +0800, Zidan Wang wrote:
ccm ----->1------------------>2<------------>3 | | | | 4 SAIx MCLK1 5 SAIx MCLK2
If this bit is set, the clock route is ccm->1->2->3, 2 to 5 is disconnect. If this bit is clear, the clock route is 3->2->5, 1 to 2 is disconnect.
@Shawn
Suppose 1 and 2 are clock MUXs that we can't specifically touch via registers. And 3 is an IO PAD that can either output a clock from CCM or input a clock from an external source outside SoC. Both 4 and 5 are two clock sources for one single SAI, SAI2 for example.
There is a bit in the GPR register to control above routes. And my question is where should be the best place to put this bit.
Apparently it's outside the CCM and SAI, not to mention it is hard to relate this bit to this ASoC dai-link driver which's supposed to solve problems between the SAI and CODECs.
Thanks Nicolin