Approved version. Approved on: 14:45, 19 July 2022
- Last edited one week ago ago
How to activate HSE monitoring
1 Article purpose[edit]
The purpose of this article is to explain how to monitor HSE oscillator.
If HSE oscillator is used in your clock tree, it is possible to enable a monitoring to detect and avoid over frequency. The LPTIM mechanism will detect an over frequency and trig a tamper event which runs some custom actions.
2 How to activate the monitoring[edit]
By default, the HSE monitor is disabled in dtsi "SoC" files.
To activate HSE monitor, add this node in your board OP-TEE device tree
&hse_monitor {
status = "okay";
};