topic LIN clock modify in S32G

LIN clock modify

longfeiwang — Thu, 31 Mar 2022 08:12:21 GMT

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?

Re: LIN clock modify

Bio_TICFSL — Tue, 05 Apr 2022 16:45:10 GMT

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

Re: LIN clock modify

longfeiwang — Thu, 07 Apr 2022 05:15:04 GMT

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?