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i.MX6SX UART clock during uboot

Question asked by torus1000 on Nov 13, 2017
Latest reply on Nov 14, 2017 by torus1000



I tested UART of i.MX6SX then I found UART clock switched from OSC to PLL3 during boot up of linux.

It caused error/unexpected data feeding on UART which assigned to Cortex-M4 in our case.

Why UART clock changed from OSC @uboot to PLL3 @linux?

Is there any way to supply PLL3 clock to UART from the beginning?


Can anyone help me?