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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