Issues about BusFeq

tony_l_cai — Tue, 13 Oct 2015 07:23:42 GMT

Hi all,

we want to change the bus freq,so we change the "/sys/bus/platform/drivers/imx6_busfreq/busfreq.13/enable" from 0 to 1，and we find that even the system entered into suspend, the high_bus_count is not 0. So the busfreq always on the high freq. But I want to change the DDR freq to 24MHz or Audio freq(50MHz).What's wrong with the Busfreq drivers? how to release all the busfreq request? Please help me ~

Re: Issues about BusFeq

igorpadykov — Tue, 13 Oct 2015 11:11:43 GMT

Hi Tony

busfreq driver works automatically, refer to Chapter 25 attached Linux Manual:

If high speed devices’ clocks are enabled, run at full speed;

If no high speed devices are enabled, but CPU freq is not at lowest setpoint, run at middle speed;

If no high speed devices are enabled and CPU freq is at lowest setpoint, but audio module is enabled, run at audio bus mode;

If no high speed devices are enabled and CPU freq is at lowest setpoint, and audio module is not enabled, run at low bus mode

Best regards

igor

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i.MX ProcessorsのトピックRe: Issues about BusFeq

Issues about BusFeq

Re: Issues about BusFeq