Open main menu

DAVE Developer's Wiki β

Changes

DESK-MX9-L/Deployment/Power Manager

148 bytes removed, 2 April
no edit summary
== Power consumption ==
 
There are various operating modes available.
'''Attention''': the SOC used does not support the DVFS and therefore the use of the <code>governor</code> present in the Linux kernel, instead of this functionality to scale the performance to have lower consumption by the SOC there is a new technology the <code>Low Drive mode</code>.
* [https://www.nxp.com/docs/en/data-sheet/IMX93CEC.pdf i.MX93 datasheet]
* [https://docs.nxp.com/bundle/AN13917/page/topics/reducing_power_consumption_0.html AN13917: i.MX 93 Power Consumption Measurement]* [https://docs.nxp.com/bundle/AN13917/page/topics/overview_of_imx_93_power_architectureintroduction.html AN13917: i.MX 93 Power Consumption Measurement]
There are four operating modes(Not all present by default on <code>Aura SOM</code>):
Note:
* (1): <code>Over drive</code> is the default operating mode.
* (2): <code>Over drive</code> can be disabled, see [[#Device Tree Disable Over drive Mode | here]].* (3): <code>Low drive</code> need to activate from <code>device tree</code> by default these are not present, see [[#Device Tree Enable Low drive Mode | here]]. 
==== Device Tree ====
</pre>
The node <code>lpm</code> to change the SOC voltage supply need the <code>PMIC buck regulator reference</code> on <code>Aura SOM</code> the PMIC Buck used to power the SOC are the <code>Buck1</code>.
===== Enable Low drive Mode =====
===== Disable Over drive Mode =====
To disable the <code>Over drive Mode</code> and have by defualt default the <code>Nomial drive Mode</code> add the property <code>no-od-mode</code> on <code>lpm</code> node of device tree.
==== Command ====
===== Quiet =====
On quiet the core nt not have any additional process/task.
===== Stressed =====
dave_user
220
edits