How to change PLL frequency in Linux Kernel?

t_kuha — Thu, 27 Aug 2020 09:13:00 GMT

Hi,

I would like to change PLL PFD frequency of i.MX 6 Quad in Linux Kernel.

The question is: what should I do to achieve this?

(Do I only have to change device tree or do I have to change the Kernel source code?)

I use Linux Kernel & BSP ver. 3.14.52

Best regards,

Re: How to change PLL frequency in Linux Kernel?

igorpadykov — Thu, 27 Aug 2020 10:30:51 GMT

Hi t_kuha

one can look at codes in cpufreq, busfreq drivers described in

sect.2.5.3 CPU Frequency Scaling (CPUFREQ),sect.2.5.3.3 Source Code Structure

sect.2.5.4 Dynamic Bus Frequency, sect.2.5.4.4 Source Code Structure

i.MX Linux Reference Manual

linux-imx - i.MX Linux kernel

Best regards
igor
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How to change PLL frequency in Linux Kernel?

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