Michael Stapelberg
46 lines
1.1 KiB
Go
46 lines
1.1 KiB
Go
package gokrazy
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import (
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"bytes"
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"fmt"
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"os"
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"path/filepath"
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"golang.org/x/sys/unix"
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)
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func getRelease() string {
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var uts unix.Utsname
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if err := unix.Uname(&uts); err != nil {
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fmt.Fprintf(os.Stderr, "minitrd: %v\n", err)
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return ""
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}
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return string(uts.Release[:bytes.IndexByte(uts.Release[:], 0)])
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}
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func loadModule(release, mod string) error {
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f, err := os.Open(filepath.Join("/lib/modules", release, mod))
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if err != nil {
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return err
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}
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defer f.Close()
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if err := unix.FinitModule(int(f.Fd()), "", 0); err != nil {
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if err != unix.EEXIST &&
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err != unix.EBUSY &&
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err != unix.ENODEV &&
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err != unix.ENOENT {
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return fmt.Errorf("FinitModule(%v): %v", mod, err)
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}
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}
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return nil
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}
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// loadModules currently contains a hard-coded list of modules but can be
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// extended to read a configuration file.
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func loadModules() error {
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// The Raspberry Pi 5 needs the pwm-fan module to be loaded for fan control
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// to work. We do not build it into the kernel so that users can unload the
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// module if they want to use their own custom fan control.
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return loadModule(getRelease(), "kernel/drivers/hwmon/pwm-fan.ko")
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}
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