[PATCH] platform/x86: thinkpad_acpi: Fix fan speed reporting on Edge E330
From: Andrew Onyshchuk
Date: Thu Aug 06 2026 - 11:45:27 EST
The ThinkPad Edge E330 with H3 firmware uses the non-standard EC fan
register block. Without a matching quirk, thinkpad_acpi reads the legacy
tachometer registers and reports 0 RPM.
Add the H3 BIOS family to TPACPI_FAN_NS so the driver reads the fan
period from EC register 0x95 using the existing non-standard reporting
path.
Tested on a ThinkPad Edge E330 with BIOS H3ET77WW and EC H3EC35WW.
Signed-off-by: Andrew Onyshchuk <andryk.rv@xxxxxxxxx>
---
drivers/platform/x86/lenovo/thinkpad_acpi.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/platform/x86/lenovo/thinkpad_acpi.c b/drivers/platform/x86/lenovo/thinkpad_acpi.c
index 445e1403308e..cca76711c547 100644
--- a/drivers/platform/x86/lenovo/thinkpad_acpi.c
+++ b/drivers/platform/x86/lenovo/thinkpad_acpi.c
@@ -8840,6 +8840,7 @@ static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
TPACPI_Q_LNV3('R', '0', 'T', TPACPI_FAN_NS), /* 11e Gen5 GL */
TPACPI_Q_LNV3('R', '1', 'D', TPACPI_FAN_NS), /* 11e Gen5 GL-R */
TPACPI_Q_LNV3('R', '0', 'V', TPACPI_FAN_NS), /* 11e Gen5 KL-Y */
+ TPACPI_Q_LNV('H', '3', TPACPI_FAN_NS), /* Edge E330 */
TPACPI_Q_LNV3('N', '1', 'O', TPACPI_FAN_NOFAN), /* X1 Tablet (2nd gen) */
TPACPI_Q_LNV3('R', '0', 'Q', TPACPI_FAN_DECRPM),/* L480 */
TPACPI_Q_LNV('8', 'F', TPACPI_FAN_TPR), /* ThinkPad x120e */
base-commit: 0d839570765118029aa8bf4a95444c6a11aacf85
--
2.34.1