linux-kernel - [PATCH AUTOSEL 6.12 144/486] hwmon: (dell-smm) Increment the number of fans

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Message-Id: <20250505223922.2682012-144-sashal@kernel.org>
Date: Mon,  5 May 2025 18:33:40 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Kurt Borja <kuurtb@...il.com>,
	Guenter Roeck <linux@...ck-us.net>,
	Sasha Levin <sashal@...nel.org>,
	jdelvare@...e.com,
	corbet@....net,
	pali@...nel.org,
	linux-hwmon@...r.kernel.org,
	linux-doc@...r.kernel.org
Subject: [PATCH AUTOSEL 6.12 144/486] hwmon: (dell-smm) Increment the number of fans

From: Kurt Borja <kuurtb@...il.com>

[ 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@...il.com>
Link: https://lore.kernel.org/r/20250304055249.51940-2-kuurtb@gmail.com
Signed-off-by: Guenter Roeck <linux@...ck-us.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 Documentation/hwmon/dell-smm-hwmon.rst | 14 +++++++-------
 drivers/hwmon/dell-smm-hwmon.c         |  5 ++++-
 2 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/Documentation/hwmon/dell-smm-hwmon.rst b/Documentation/hwmon/dell-smm-hwmon.rst
index 74905675d71f9..5a4edb6565cf9 100644
--- a/Documentation/hwmon/dell-smm-hwmon.rst
+++ b/Documentation/hwmon/dell-smm-hwmon.rst
@@ -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
diff --git a/drivers/hwmon/dell-smm-hwmon.c b/drivers/hwmon/dell-smm-hwmon.c
index f5bdf842040e6..b043fbd15c9da 100644
--- a/drivers/hwmon/dell-smm-hwmon.c
+++ b/drivers/hwmon/dell-smm-hwmon.c
@@ -73,7 +73,7 @@
 #define DELL_SMM_LEGACY_EXECUTE	0x1
 
 #define DELL_SMM_NO_TEMP	10
-#define DELL_SMM_NO_FANS	3
+#define DELL_SMM_NO_FANS	4
 
 struct smm_regs {
 	unsigned int eax;
@@ -1074,11 +1074,14 @@ 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
-- 
2.39.5