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hwmon: (dell-smm) Increment the number of fans

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[ Upstream commit dbcfcb239b3b452ef8782842c36fb17dd1b9092f ]

Some Alienware laptops that support the SMM interface, may have up to 4
fans.

Tested on an Alienware x15 r1.

Signed-off-by: Kurt Borja <kuurtb@gmail.com>
Link: https://lore.kernel.org/r/20250304055249.51940-2-kuurtb@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Kurt Borja
2025-03-04 00:52:50 -05:00
committed by Greg Kroah-Hartman
parent def5f5bc83
commit 8a7f2e84f8
2 changed files with 11 additions and 8 deletions
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14
Documentation/hwmon/dell-smm-hwmon.rst
View File

@@ -32,12 +32,12 @@ Temperature sensors and fans can be queried and set via the standard
=============================== ======= =======================================
Name Perm Description
=============================== ======= =======================================
fan[1-3]_input RO Fan speed in RPM.
fan[1-3]_label RO Fan label.
fan[1-3]_min RO Minimal Fan speed in RPM
fan[1-3]_max RO Maximal Fan speed in RPM
fan[1-3]_target RO Expected Fan speed in RPM
pwm[1-3] RW Control the fan PWM duty-cycle.
fan[1-4]_input RO Fan speed in RPM.
fan[1-4]_label RO Fan label.
fan[1-4]_min RO Minimal Fan speed in RPM
fan[1-4]_max RO Maximal Fan speed in RPM
fan[1-4]_target RO Expected Fan speed in RPM
pwm[1-4] RW Control the fan PWM duty-cycle.
pwm1_enable WO Enable or disable automatic BIOS fan
control (not supported on all laptops,
see below for details).
@@ -93,7 +93,7 @@ Again, when you find new codes, we'd be happy to have your patches!
---------------------------
The driver also exports the fans as thermal cooling devices with
``type`` set to ``dell-smm-fan[1-3]``. This allows for easy fan control
``type`` set to ``dell-smm-fan[1-4]``. This allows for easy fan control
using one of the thermal governors.
Module parameters

5
drivers/hwmon/dell-smm-hwmon.c
View File

@@ -67,7 +67,7 @@
#define I8K_POWER_BATTERY 0x01
#define DELL_SMM_NO_TEMP 10
#define DELL_SMM_NO_FANS 3
#define DELL_SMM_NO_FANS 4
struct dell_smm_data {
struct mutex i8k_mutex; /* lock for sensors writes */
@@ -940,11 +940,14 @@ static const struct hwmon_channel_info * const dell_smm_info[] = {
HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MIN | HWMON_F_MAX |
HWMON_F_TARGET,
HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MIN | HWMON_F_MAX |
HWMON_F_TARGET,
HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MIN | HWMON_F_MAX |
HWMON_F_TARGET
),
HWMON_CHANNEL_INFO(pwm,
HWMON_PWM_INPUT | HWMON_PWM_ENABLE,
HWMON_PWM_INPUT,
HWMON_PWM_INPUT,
HWMON_PWM_INPUT
),
NULL