Hi,
i've compared Linux busfreq driver in FSL BSP between mx23 and mx28 . In the mx23 profile the h_autoslow_flags are greater 0, but in the mx28 profile they are always 0 (=unused from my understanding).
What's the reason for this?
Best regards
Stefan Wahren
Solved! Go to Solution.
We do not use the hardware auto-slow mode for the HBUS
(HW_CLKCTRL_HBUS[AUTO_SLOW_MODE] = 1).
Software (manual) approach is used instead. This allows
to re-configure correctly memory frequency too.
Regards,
Yuri.
Linux BSP for i.MX28 supports standard CPUFREQ feature in order
to configure several typical configurations for CPU and memory / bus
frequencies.
Have a great day,
Yuri
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------
Hi Yuri,
let me clarify my question:
Why doesn't the mx28 busfreq driver make use of HBus autoslow feature?
Are there any drawbacks that leads to that descision?
We do not use the hardware auto-slow mode for the HBUS
(HW_CLKCTRL_HBUS[AUTO_SLOW_MODE] = 1).
Software (manual) approach is used instead. This allows
to re-configure correctly memory frequency too.
Regards,
Yuri.