Re: [PATCH] hwmon: dell-smm-hwmon: Add fan control for OptiPlex Micro 7020
From: Armin Wolf
Date: Sun Aug 02 2026 - 19:35:58 EST
Am 02.08.26 um 23:03 schrieb Jonas Haugk:
Add the Dell OptiPlex Micro 7020 to the fan control whitelist using
the 0x34a3/0x35a3 SMM command pair.
Manual fan control was tested successfully with PWM values 64, 128,
and 255. The fan speed changed accordingly. Restoring automatic BIOS
fan control through pwm1_enable also worked correctly.
Tested on a Dell OptiPlex Micro 7020.
Hi,
can you check if the I8K_FAN_30A3_31A3 pair also work? AFAIK this pair
is being used by recent releases of the OEM software, so i would prefer
using it.
Thanks,
Armin Wolf
Signed-off-by: Jonas Haugk <j.haugk@xxxxxx>
---
drivers/hwmon/dell-smm-hwmon.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/hwmon/dell-smm-hwmon.c b/drivers/hwmon/dell-smm-hwmon.c
index 20920d4bd..23773421a 100644
--- a/drivers/hwmon/dell-smm-hwmon.c
+++ b/drivers/hwmon/dell-smm-hwmon.c
@@ -1655,6 +1655,15 @@ static const struct dmi_system_id i8k_whitelist_fan_control[] __initconst = {
},
.driver_data = (void *)&i8k_fan_control_data[I8K_FAN_30A3_31A3],
},
+ {
+ .ident = "Dell OptiPlex Micro 7020",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+ DMI_EXACT_MATCH(DMI_PRODUCT_NAME,
+ "OptiPlex Micro 7020"),
+ },
+ .driver_data = (void *)&i8k_fan_control_data[I8K_FAN_34A3_35A3],
+ },
{ }
};