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hwmon: (yogafan) Add Lenovo Yoga Pro 9 16IMH9

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The Lenovo Yoga Pro 9 16IMH9 (83DN) exposes its fan tachometers at
ACPI paths different from the generic Yoga configuration. Add a
model-specific two-fan configuration for the PC00.LPCB.EC0 namespace
and document the corrected mapping.

Tested on a Lenovo Yoga Pro 9 16IMH9 (83DN) with BIOS NKCN35WW: the
patched module registers fan1_input and fan2_input, both reporting 1800
RPM at idle.

Signed-off-by: Richard Ahlquist <rahlquist@gmail.com>
Link: https://patch.msgid.link/20260813164746.105154-1-rahlquist@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
rahlquist 2026-08-13 12:47:46 -04:00 committed by Guenter Roeck
parent ebdf602889
commit c191107b0f
2 changed files with 21 additions and 1 deletions
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3
Documentation/hwmon/yogafan.rst
View File

@ -89,7 +89,8 @@ immediately to ensure the user knows the fan has stopped.
----------------------------------------------------------------------------------------------------
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
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

19
drivers/hwmon/yogafan.c
View File

@ -90,6 +90,17 @@ 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();
@ -237,6 +248,14 @@ 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 = {