LIN clock modify

[longfeiwang]

The LIN module has three clock sources: FIRC, FXOSC, and PERIPH_PLL_PHI3_CLK. Now the clock source PERIPH_PLL_PHI3_CLK is selected. I want to change the clock source from PERIPH_PLL_PHI3_CLK to FXOSC. How should I change it under linux?

[Bio_TICFSL]

Hello longfeiwang,

Uboot configures the following clocks/PLLS.

• A53 core PLL, DFS and Muxes to get the clocks setup for A53.
• Periph PLL, DFS and  MC_CGM0  for peripherals (PCIe, SPI, SDHC, GMAC, CAN, LIN, FTM, etc)
• DDR PLL and MC_CGM5 for DDR clock
• Accel PLL
• PFE MAC clock
• PFE PE clock
• Aurora PLL: may or may not be done in u-boot(TBD)

As such Linux does not configure/re-configure the clocks.

Regards

[longfeiwang]

After linux starts, modify the clock source of the LIN module and change it from PERIPH_PLL_PHI3_CLK to FXOSC. What should I do?