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Portugal Futurista fork of OpenWrt — custom targets and PF router packages
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Stephane Lepain 5feee05dbb qualcommax: fix pwm period calculation 
The GL.iNet GL-AXT1800 (ipq6018) requests a 40,000 ns (25 kHz) PWM
period for its four-wire fan:

  pwms = <&pwm 1 40000 0>;

with the IPQ6018 PWM node clocked at 100 MHz. ipq_pwm_apply() pins
pwm_div at its maximum and derives only pre_div from the requested
period:

  pre_div = period_ns * clk_rate / (NSEC_PER_SEC * (pwm_div + 1));
  if (!pre_div)
          return -ERANGE;

For 40,000 ns at 100 MHz this is floor(0.061) == 0, so the driver
deterministically returns -ERANGE and pwm-fan fails to probe on every
boot:

  pwm-fan pwm-fan: failed to enable PWM
  pwm-fan pwm-fan: Failed to configure PWM: -34
  pwm-fan pwm-fan: probe with driver pwm-fan failed with error -34

Probe returns before the tachometer IRQ is requested and before
fan-supply is claimed, so the board loses fan RPM reporting and the
vcc_fan 5V regulator stays disabled. The fan never spins and the DTS
cooling-maps (trips at 50/75/100 C) have no cooling device to bind to.

This is the same defect fixed for qualcommbe in commit 8db23dc91a
("qualcommbe: fix pwm period calculation") by Kenneth Kasilag, whose
rationale explicitly calls out 25 kHz four-wire fan PWM. qualcommax
carries its own copy of the pwm-ipq driver and was not covered by that
fix. The patch added here is that work backported to qualcommax, with
authorship preserved; the base driver differs slightly between targets
so the hunks were rebased onto the qualcommax copy.

Confirmed on hardware. The board was tested on the 6.12 kernel, which
this target has since dropped; the pwm-ipq driver source is identical
under 6.12 and 6.18, so the patch and its effect are unchanged. Before,
driving the PWM directly from userspace on a GL-AXT1800 running
r35591-d0110a25ed:

  # echo 40000   > period; echo 1 > enable   -> write error (-ERANGE)
  # echo 2700000 > period; echo 1 > enable   -> succeeds

After building and flashing an image with this patch, pwm-fan probes
cleanly and the fan is verified spinning by its own tachometer:

  /sys/class/hwmon/hwmon7/name                          = pwmfan
  /sys/devices/platform/pwm-fan/hwmon/hwmon7/fan1_input = 3548
  /sys/class/regulator/regulator.3 (vcc_fan)            = enabled
  /sys/class/thermal/cooling_device1                    = pwm-fan

and no PWM errors remain in dmesg.

Link: 8db23dc91a
Signed-off-by: Stephane Lepain <stephanelepain@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/24479
Signed-off-by: Robert Marko <robimarko@gmail.com>
2026-08-03 09:04:47 +02:00
.devcontainer/ci-env
.github ixp4xx-microcode: use the linux-firmware images 2026-08-01 18:36:20 +02:00
.vscode editor: vscode: do not trim diff file trailing whitespace 2026-07-25 22:45:06 +02:00
config build: gate firmware image signing behind SIGN_FIRMWARE 2026-07-20 10:33:41 +02:00
include build: make GL.iNet metadata reproducible 2026-07-23 14:39:19 +02:00
LICENSES
package dropbear: drop obsolete rsa-sha2-256 pubkey patch 2026-08-03 01:27:45 +02:00
scripts projectsmirrors: remove GNOME mirrors mirror.csclub.uwaterloo.ca 2026-08-02 15:02:33 +02:00
target qualcommax: fix pwm period calculation 2026-08-03 09:04:47 +02:00
toolchain Revert "toolchain: drop $(REVISION) from GCC version" 2026-07-29 09:14:05 +02:00
tools tools: gnulib: fix build with latest glibc C23 changes 2026-07-30 19:40:44 +02:00
.gitattributes gitattributes: automatically convert dts file CRLF line endings to LF 2025-11-29 17:52:35 +01:00
.gitignore
BSDmakefile
Config.in
COPYING
feeds.conf.default feeds: revert to git.openwrt.org 2026-01-09 21:55:00 +01:00
Makefile build: include tests/Makefile if available 2024-06-17 17:51:31 +02:00
README.md prereq-build: bump python requirement to 3.8 2026-06-10 09:00:33 +02:00
rules.mk build: do not set CCACHE_COMPILERCHECK 2026-04-22 23:57:01 +02:00

README.md

OpenWrt logo

OpenWrt Project is a Linux operating system targeting embedded devices. Instead of trying to create a single, static firmware, OpenWrt provides a fully writable filesystem with package management. This frees you from the application selection and configuration provided by the vendor and allows you to customize the device through the use of packages to suit any application. For developers, OpenWrt is the framework to build an application without having to build a complete firmware around it; for users this means the ability for full customization, to use the device in ways never envisioned.

Sunshine!

Download

Built firmware images are available for many architectures and come with a package selection to be used as WiFi home router. To quickly find a factory image usable to migrate from a vendor stock firmware to OpenWrt, try the Firmware Selector.

If your device is supported, please follow the Info link to see install instructions or consult the support resources listed below.

An advanced user may require additional or specific package. (Toolchain, SDK, ...) For everything else than simple firmware download, try the wiki download page:

Development

To build your own firmware you need a GNU/Linux, BSD or macOS system (case sensitive filesystem required). Cygwin is unsupported because of the lack of a case sensitive file system.

Requirements

You need the following tools to compile OpenWrt, the package names vary between distributions. A complete list with distribution specific packages is found in the Build System Setup documentation.

binutils bzip2 diff find flex gawk gcc-6+ getopt grep install libc-dev libz-dev
make4.1+ perl python3.8+ rsync subversion unzip which

Quickstart

  1. Run ./scripts/feeds update -a to obtain all the latest package definitions defined in feeds.conf / feeds.conf.default

  2. Run ./scripts/feeds install -a to install symlinks for all obtained packages into package/feeds/

  3. Run make menuconfig to select your preferred configuration for the toolchain, target system & firmware packages.

  4. Run make to build your firmware. This will download all sources, build the cross-compile toolchain and then cross-compile the GNU/Linux kernel & all chosen applications for your target system.

Related Repositories

The main repository uses multiple sub-repositories to manage packages of different categories. All packages are installed via the OpenWrt package manager called opkg. If you're looking to develop the web interface or port packages to OpenWrt, please find the fitting repository below.

  • LuCI Web Interface: Modern and modular interface to control the device via a web browser.

  • OpenWrt Packages: Community repository of ported packages.

  • OpenWrt Routing: Packages specifically focused on (mesh) routing.

  • OpenWrt Video: Packages specifically focused on display servers and clients (Xorg and Wayland).

Support Information

For a list of supported devices see the OpenWrt Hardware Database

Documentation

Support Community

  • Forum: For usage, projects, discussions and hardware advise.
  • Support Chat: Channel #openwrt on oftc.net.

Developer Community

License

OpenWrt is licensed under GPL-2.0