On Fri, 19 Jun 2020 14:18:21 +0200 Pali Rohár <pali@xxxxxxxxxx> wrote: >On Thursday 18 June 2020 21:55:29 Jeffrey Lin wrote: >> This allows manual PWM control without the BIOS fighting back on Dell >> Latitude 5480. >> >> Signed-off-by: Jeffrey Lin <jeffrey@xxxxxxxxx> > >If it is working fine on your machine, you can add my: Yes, the below patch works on my machine. dmesg reports "dell_smm_hwmon: enabling support for setting automatic/manual fan control" and writing 1 to /sys/class/hwmon/hwmon4/pwm1_enable allows pwmconfig/fancontrol full control. > >Acked-by: Pali Rohár <pali@xxxxxxxxxx> > >> --- >> drivers/hwmon/dell-smm-hwmon.c | 8 ++++++++ >> 1 file changed, 8 insertions(+) >> >> diff --git a/drivers/hwmon/dell-smm-hwmon.c b/drivers/hwmon/dell-smm-hwmon.c >> index 16be012a95ed..ec448f5f2dc3 100644 >> --- a/drivers/hwmon/dell-smm-hwmon.c >> +++ b/drivers/hwmon/dell-smm-hwmon.c >> @@ -1187,6 +1187,14 @@ static struct dmi_system_id >> i8k_whitelist_fan_control[] __initdata = { }, >> .driver_data = (void >> *)&i8k_fan_control_data[I8K_FAN_34A3_35A3], }, >> + { >> + .ident = "Dell Latitude 5480", >> + .matches = { >> + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), >> + DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Latitude 5480"), >> + }, >> + .driver_data = (void >> *)&i8k_fan_control_data[I8K_FAN_34A3_35A3], >> + }, >> { >> .ident = "Dell Latitude E6440", >> .matches = { >> -- >> 2.27.0 >>
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