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[213.217.7.27]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-49d04fe7f9dsm90386105e9.0.2026.09.05.19.10.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 05 Sep 2026 19:10:45 -0700 (PDT) From: Sergio Melas To: Guenter Roeck Cc: linux-hwmon@vger.kernel.org, linux-kernel@vger.kernel.org, Sergio Melas Subject: [PATCH] hwmon: (yogafan) Add support for new Lenovo models Date: Sun, 6 Sep 2026 04:10:23 +0200 Message-ID: <20260906021023.766992-1-sergiomelas@gmail.com> X-Mailer: git-send-email 2.55.0 Precedence: bulk X-Mailing-List: linux-hwmon@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 --- 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