i.MX8QM ECSPI clock

felixradensky — Thu, 11 Jul 2019 21:14:15 GMT

Hi,

According to i.MX8M Datasheet eCSPI interfaces can operate at maximum data rate of 52Mbit/s. In reality eCSPI clock is limited to 24MHz (checked in /sys/kernel/debug/clk/clk_summary and also using scope). What can be done to supply higher frequency clock to eCSPI ?

Thanks.

Re: i.MX8QM ECSPI clock

igorpadykov — Thu, 11 Jul 2019 23:07:49 GMT

Hi Felix

>According to i.MX8M Datasheet eCSPI interfaces can operate at maximum data rate of 52Mbit/s

below ecspi data for i.MX 8M Dual / 8M QuadLite / 8M Quad Applications Processors Data Sheet for Consumer Products

note, i.MX8M is different processor than i.MX8QM

for linux clocks one can look at clk driver :

imx\clk\drivers - linux-imx - i.MX Linux kernel

Linux clock framework documentation:
https://www.kernel.org/doc/Documentation/clk.txt

Best regards
igor
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