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AM4378: linux driver spi clock no activity

Part Number: AM4378
Other Parts Discussed in Thread: AM4372

in our custom am4372 based board we are using mcspi0 interface. in uboot it is properly working. so there is no problem in pinmux or hardware.

but in linux 5.10 cs is coming properly. but clock is constantly low for some time then high afterwards.

can anybody explain this?