Introduction
This page gives an overview of the CPU idledriver which is available as part of the ZynqMP Linux distribution.
Paths, files, links and documentation on this page are given relative to the Linux kernel source tree.
2017.1
Summary:
Add idle state for ZynqMP
2017.2
Summary:
No change
2017.3
Summary:
No change
Paths, files, links and documentation on this page are given relative to the Linux kernel source tree.
HW IP features
CPU idling for Zynqmp Ultrascale+ MPSoc APU.Features supported in driver
CPU idling for Zynqmp Ultrascale+ MPSoc APU.Missing Features, Known Issues and Limitations
Reporting power is not supported.Kernel Configuration
The following config options should be enabled in order to build the cpufreq driverCPU Idle [*] CPU idle PM support [*] Ladder governor (for periodic timer tick) ARM CPU Idle Drivers [*] Generic ARM/ARM64 CPU idle Driver
Devicetree
cpu1: cpu@1 {
compatible = "arm,cortex-a53", "arm,armv8";
device_type = "cpu";
enable-method = "psci";
reg = <0x1>;
operating-points-v2 = <&&cpu_opp_table>;
cpu-idle-states = <&&CPU_SLEEP_0>;
};
Change Log
2017.1
Summary:
- Added cpuidle feature.
Add idle state for ZynqMP
2017.2
Summary:
No change
2017.3
Summary:
No change
2017.4
Summary:
No change
Summary:
No change
2018.1
Summary:
No change
Summary:
No change
2018.2
Summary:
No change
Summary:
No change
2018.3
Summary:
No change
Summary:
No change
2019.2
Summary:
No change
Summary:
No change
2020.1
Summary:
No change
Summary:
No change
2020.2
Summary:
No change
Summary:
No change