[PATCH] hwmon: (yogafan) Add support for new Lenovo models
From: Sergio Melas
Date: Sat Sep 05 2026 - 22:11:01 EST
Add DMI quirk entries and map correct ACPI paths and configurations for
additional Lenovo laptop models: Yoga 14cACN 2021, IdeaPad 3 15ALC6 Ub
and Yoga 740-15IML.
DMI product family matching is finally preferred over product name to
reliably distinguish identical model numbers with different internal
fan layouts:
MODEL (DMI PN) | FAMILY / SERIES | FULL ACPI OBJECT PATH
82KU | IdeaPad 3 15ALC6 | \_SB.PCI0.LPC0.EC0.FAN0
82KU | IdeaPad 3 15ALC6 ub| \_SB.PCI0.LPC0.EC0.FANS/FA2S
Signed-off-by: Sergio Melas <sergiomelas@xxxxxxxxx>
---
Documentation/hwmon/yogafan.rst | 40 +++++++++++------------
drivers/hwmon/yogafan.c | 58 +++++++++++++++++++++------------
2 files changed, 57 insertions(+), 41 deletions(-)
diff --git a/Documentation/hwmon/yogafan.rst b/Documentation/hwmon/yogafan.rst
index 9ff5db5dc..a7e628bc3 100644
--- a/Documentation/hwmon/yogafan.rst
+++ b/Documentation/hwmon/yogafan.rst
@@ -85,27 +85,26 @@ immediately to ensure the user knows the fan has stopped.
::
- MODEL (DMI PN) | FAMILY / SERIES | EC OFFSET | FULL ACPI OBJECT PATH | WIDTH | MULTiplier
+ MODEL (DMI PN) | FAMILY / SERIES | EC OFFSET | FULL ACPI OBJECT PATH | WIDTH | MULTiplier
----------------------------------------------------------------------------------------------------
- 82N7 | Yoga 14cACN | 0x06 | \_SB.PCI0.LPC0.EC0.FANS | 8-bit | 100
- 80V2 / 81C3 | Yoga 710/720 | 0x06 | \_SB.PCI0.LPC0.EC0.FAN0 | 8-bit | 100
- 83E2 | Yoga Pro 7 | 0xFE | \_SB.PCI0.LPC0.EC0.FANS | 8-bit | 100
- 83DN | Yoga Pro 9 16IMH9 | 0x06/0xFE | \_SB.PC00.LPCB.EC0.FANS/FA2S | 8-bit | 100
- 82A2 / 82A3 | Yoga Slim 7 | 0x06 | \_SB.PCI0.LPC0.EC0.FANS | 8-bit | 100
- 81YM / 82FG | IdeaPad 5 | 0x06 | \_SB.PCI0.LPC0.EC0.FAN0 | 8-bit | 100
- 82JW / 82JU | Legion 5 (AMD) | 0xFE/0xFF | \_SB.PCI0.LPC0.EC0.FANS (Fan1) | 16-bit | 1
- 82JW / 82JU | Legion 5 (AMD) | 0xFE/0xFF | \_SB.PCI0.LPC0.EC0.FA2S (Fan2) | 16-bit | 1
- 82WQ | Legion 7i (Int) | 0xFE/0xFF | \_SB.PCI0.LPC0.EC0.FANS (Fan1) | 16-bit | 1
- 82WQ | Legion 7i (Int) | 0xFE/0xFF | \_SB.PCI0.LPC0.EC0.FA2S (Fan2) | 16-bit | 1
- 82XV / 83DV | LOQ 15/16 | 0xFE/0xFF | \_SB.PCI0.LPC0.EC0.FANS /FA2S | 16-bit | 1
- 83AK | ThinkBook G6 | 0x06 | \_SB.PCI0.LPC0.EC0.FAN0 | 8-bit | 100
- 81X1 | Flex 5 | 0x06 | \_SB.PCI0.LPC0.EC0.FAN0 | 8-bit | 100
- 83KF | XiaoXinPro 13ARE | 0x06/0xFE | \_SB.PCI0.LPC0.EC0.FANS/FA2S | 8-bit | 100
- 82KU | IdeaPad 3 15ALC6 | 0x06 | \_SB.PCI0.LPC0.EC0.FAN0 | 8-bit | 100
- 83RU | Legion Pro 7 16 | 0x03/0x06 | \_SB.PCI0.LPC0.EC0.FANS/FA2S | 8-bit | 100
- 83KF | Yoga Pro 7 14IAH | 0x06 | \_SB.PC00.LPCB.EC0.FANS | 8-bit | 100
- 83BS | Yoga 7 16ARP8 | 0x03/0x06 | \_SB.PCI0.LPC0.EC0.FANS/FA2S | 8-bit | 100
- *Legacy* | Pre-2020 Models | 0x06 | \_SB.PCI0.LPC.EC.FAN0 | 8-bit | 100
+ 82N7 | Yoga 14cACN | 0x06 | \_SB.PCI0.LPC0.EC0.FANS | 8-bit | 100
+ 80V2 / 81C3 | Yoga 710/720 | 0x06 | \_SB.PCI0.LPC0.EC0.FAN0 | 8-bit | 100
+ 83E2 / 83DN | Yoga Pro 7/9 | 0xFE | \_SB.PCI0.LPC0.EC0.FANS | 8-bit | 100
+ 82A2 / 82A3 | Yoga Slim 7 | 0x06 | \_SB.PCI0.LPC0.EC0.FANS | 8-bit | 100
+ 81YM / 82FG | IdeaPad 5 | 0x06 | \_SB.PCI0.LPC0.EC0.FAN0 | 8-bit | 100
+ 82JW / 82JU | Legion 5 (AMD) | 0xFE/0xFF | \_SB.PCI0.LPC0.EC0.FANS/FA2S | 16-bit | 1
+ 82WQ | Legion 7i (Int) | 0xFE/0xFF | \_SB.PCI0.LPC0.EC0.FANS/FA2S | 16-bit | 1
+ 82XV / 83DV | LOQ 15/16 | 0xFE/0xFF | \_SB.PCI0.LPC0.EC0.FANS/FA2S | 16-bit | 1
+ 83AK | ThinkBook G6 | 0x06 | \_SB.PCI0.LPC0.EC0.FAN0 | 8-bit | 100
+ 81TD | Yoga 740-15IML | 0x06 | \_SB.PCI0.LPCB.EC0.FANS | 8-bit | 100
+ 81X1 | Flex 5 | 0x06 | \_SB.PCI0.LPC0.EC0.FAN0 | 8-bit | 100
+ 83KF | XiaoXinPro 13ARE | 0x06/0xFE | \_SB.PCI0.LPC0.EC0.FANS/FA2S | 8-bit | 100
+ 82KU | IdeaPad 3 15ALC6 | 0x06 | \_SB.PCI0.LPC0.EC0.FAN0 | 8-bit | 100
+ 82KU | IdeaPad 3 15ALC6 ub| 0x06 | \_SB.PCI0.LPC0.EC0.FANS/FA2S | 8-bit | 100
+ 83RU | Legion Pro 7 16 | 0x03/0x06 | \_SB.PCI0.LPC0.EC0.FANS/FA2S | 8-bit | 100
+ 83KF | Yoga Pro 7 14IAH | 0x06 | \_SB.PC00.LPCB.EC0.FANS | 8-bit | 100
+ 83BS | Yoga 7 16ARP8 | 0x03/0x06 | \_SB.PCI0.LPC0.EC0.FANS/FA2S | 8-bit | 100
+ *Legacy* | Pre-2020 Models | 0x06 | \_SB.PCI0.LPC.EC.FAN0 | 8-bit | 100
----------------------------------------------------------------------------------------------------
METHODOLOGY & IDENTIFICATION:
@@ -159,6 +158,7 @@ Contributors & DSDT Providers:
- **Sarbajit Sarkar** (Lenovo LOQ 15IAX9)
- **HinataKato** (XiaoXin Pro 13ARE 2020 - 83KF)
- **PenPenIsGod** (IdeaPad 3 15ALC6 - 82KU & Legion Pro 7 16AFR10H - 83RU)
+- **wizard-28** (IdeaPad 3 15ALC6 Ub - 82KU)
- **unlockxiaom** (Legion Pro 7 16AFR10H - 83RU, Yoga Pro 7 14IAH10 - 83KF, ThinkCentre M80q)
- **Phani Pavan K** (Yoga Pro 7 14IAH10 - 83KF)
- **Splarkszter** (Yoga 7 16ARP8 - 83BS)
diff --git a/drivers/hwmon/yogafan.c b/drivers/hwmon/yogafan.c
index 413ddc721..2ce358c74 100644
--- a/drivers/hwmon/yogafan.c
+++ b/drivers/hwmon/yogafan.c
@@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0-only
-/*
- * yoga_fan.c - Lenovo Yoga/Legion Fan Hardware Monitoring Driver
+/**
+ * yogafan.c - Lenovo Yoga/Legion Fan Hardware Monitoring Driver
*
* Provides fan speed monitoring for Lenovo Yoga, Legion, and IdeaPad
* laptops by interfacing with the Embedded Controller (EC) via ACPI.
@@ -53,6 +53,17 @@ struct yoga_fan_data {
};
/* Specific configurations mapped via DMI */
+static const struct yogafan_config yoga_740_15iml_cfg = {
+ .multiplier = 100,
+ .fan_count = 1,
+ .paths = { "\\_SB.PCI0.LPCB.EC0.FANS", NULL }
+};
+
+static const struct yogafan_config ideapad_3_15alc6_82ku_cfg = {
+ .multiplier = 100,
+ .fan_count = 2,
+ .paths = { "\\_SB.PCI0.LPC0.EC0.FANS", "\\_SB.PCI0.LPC0.EC0.FA2S" },
+};
static const struct yogafan_config yoga_8bit_fans_cfg = {
.multiplier = 100,
@@ -90,17 +101,6 @@ static const struct yogafan_config yoga_pro_7_14iah10_cfg = {
.paths = { "\\_SB.PC00.LPCB.EC0.FANS", NULL }
};
-/*
- * Lenovo Yoga Pro 9 16IMH9 (83DN) uses the PC00 namespace and has two
- * 8-bit fan tachometer fields.
- */
-static const struct yogafan_config yoga_pro_83dn_cfg = {
- .multiplier = 100,
- .fan_count = 2,
- .paths = { "\\_SB.PC00.LPCB.EC0.FANS",
- "\\_SB.PC00.LPCB.EC0.FA2S" }
-};
-
static void apply_rllag_filter(struct yoga_fan_data *data, int idx, long raw_rpm)
{
ktime_t now = ktime_get_boottime();
@@ -200,6 +200,30 @@ static const struct hwmon_chip_info yoga_fan_chip_info = {
};
static const struct dmi_system_id yogafan_quirks[] = {
+ {
+ .ident = "Lenovo Yoga 740-15IML",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+ DMI_MATCH(DMI_PRODUCT_FAMILY, "Yoga 740-15IML"),
+ },
+ .driver_data = (void *)&yoga_740_15iml_cfg,
+ },
+ {
+ .ident = "Lenovo IdeaPad 3 15ALC6 Ub",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+ DMI_MATCH(DMI_PRODUCT_FAMILY, "IdeaPad 3 15ALC6 Ub"),
+ },
+ .driver_data = (void *)&ideapad_3_15alc6_82ku_cfg,
+ },
+ {
+ .ident = "Yoga 14cACN 2021",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+ DMI_MATCH(DMI_PRODUCT_FAMILY, "Yoga 14cACN 2021"),
+ },
+ .driver_data = (void *)&yoga_8bit_fans_cfg,
+ },
{
.ident = "Lenovo LOQ 15IAX9",
.matches = {
@@ -248,14 +272,6 @@ static const struct dmi_system_id yogafan_quirks[] = {
},
.driver_data = (void *)&xiaoxin_8bit_dual_cfg,
},
- {
- .ident = "Lenovo Yoga Pro 9 16IMH9 (83DN)",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
- DMI_MATCH(DMI_PRODUCT_NAME, "83DN"),
- },
- .driver_data = (void *)&yoga_pro_83dn_cfg,
- },
{
.ident = "Lenovo Yoga",
.matches = {
--
2.55.0