Axi timer
Axi timer
Table of Contents
AXI Timer
Introduction
This page gives an overview of Axi Timer Linux driver which is available as part of the Linux distribution.The LogiCORE™ IP AXI Timer/Counter is a 32/ 64-bit timer module that interfaces to the AXI4-Lite interface.
HW IP features
AXI interface based on the AXI4-Lite specification
Two programmable interval timers with interrupt, event generation, and event capture capabilities
Configurable counter width
One Pulse Width Modulation (PWM) output
Cascaded operation of timers in generate and capture modes
Kernel Configuration
Existing driver ( https://github.com/Xilinx/linux-xlnx/blob/xlnx_rebase_v5.4_2020.1/arch/microblaze/kernel/timer.c) is tightly coupled with Microblaze processor. By default it would be used as "arch timer" for Microblaze.
Devicetree
axi_timer_1: timer@41c00000 {
clock-frequency = <100000000>;
clocks = <&clk_bus_0>;
compatible = "xlnx,xps-timer-1.00.a";
interrupt-parent = <&axi_intc_1>;
interrupts = <2 2>;
reg = <0x41c00000 0x10000>;
xlnx,count-width = <0x20>;
xlnx,one-timer-only = <0x0>;
};Mainline status
Existing driver https://github.com/Xilinx/linux-xlnx/blob/master/arch/microblaze/kernel/timer.c is in sync with mainline, except changes related to SMP support.
Boot log snippet
/amba_pl/timer@41c00000: irq=2
xilinx_timer_set_mode: shutdown
xilinx_timer_set_mode: periodic
sched_clock: 32 bits at 100MHz, resolution 10ns, wraps every 42949672950ns<span style="font-family: arial,helvetica,sans-serif; font-size: 1.4em; line-height: 1.5;">**Related Links**Changelog
2025.2
None
2025.1
None
2024.2
None
2024.1
None
2023.2
None
2023.1
None
2022.2
None
2022.1
None
2021.2
Addressed warnings reported by coverity tool
2021.1
None
2020.2
None
2020.1
Updated driver to support SMP Microblaze systems
2019.2
None
2019.1
microblaze: Remove architecture heart beat code
© 2025 Advanced Micro Devices, Inc. Privacy Policy