[PATCH v3] hwmon: (asus-ec-sensors) add CPU_Opt fan for ROG STRIX X570-E GAMING

[PATCH v3] hwmon: (asus-ec-sensors) add CPU_Opt fan for ROG STRIX X570-E GAMING

[Matt Layher via B4 Relay]

Testing:
- Runtime: the same one-line change applied to the driver in v6.18.54,
  loaded on the board in place of the stock module; CPU_Opt read
  1454-1463 RPM and the chipset fan 0.
- Build: hwmon-next with W=1 and sparse (C=1), no warnings;
  checkpatch --strict reports no errors, warnings or checks.

Signed-off-by: Matt Layher <mdlayher@gmail.com>
---
Changes in v3:
- Drop the LLM usage note in favor of the Assisted-by tag (Eugene).
- Move the testing notes to a cover letter (Eugene).
- Link to v2: https://patch.msgid.link/20261006-asus-ec-x570e-cpu-opt-v2-1-74df23c22f04@gmail.com

Changes in v2:
- Shorten the commit message (Eugene).
- Link to v1: https://patch.msgid.link/20261004-asus-ec-x570e-cpu-opt-v1-1-d9ea371c30d5@gmail.com

---
Matt Layher (1):
      hwmon: (asus-ec-sensors) add CPU_Opt fan for ROG STRIX X570-E GAMING

 drivers/hwmon/asus-ec-sensors.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
base-commit: 4781ca52761e666cf18b591e6bb0478396c90320
change-id: 20261004-asus-ec-x570e-cpu-opt-623621af0790

Best regards,
--  
Matt Layher <mdlayher@gmail.com>

[PATCH v3] hwmon: (asus-ec-sensors) add CPU_Opt fan for ROG STRIX X570-E GAMING

[Matt Layher via B4 Relay]

From: Matt Layher <mdlayher@gmail.com>

The board has a CPU_OPT fan header, which the EC reports at the same
register (bank 0, 0xb0) as the other AMD 500 series boards. Enable it.

Assisted-by: LLM sparse
Signed-off-by: Matt Layher <mdlayher@gmail.com>
---
 drivers/hwmon/asus-ec-sensors.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hwmon/asus-ec-sensors.c b/drivers/hwmon/asus-ec-sensors.c
index 19f423e45ce5..8261ddd00653 100644
--- a/drivers/hwmon/asus-ec-sensors.c
+++ b/drivers/hwmon/asus-ec-sensors.c
@@ -721,7 +721,7 @@ static const struct ec_board_info board_info_strix_x470_i_gaming = {
 
 static const struct ec_board_info board_info_strix_x570_e_gaming = {
 	.sensors = SENSOR_SET_TEMP_CHIPSET_CPU_MB |
-		SENSOR_TEMP_T_SENSOR |
+		SENSOR_TEMP_T_SENSOR | SENSOR_FAN_CPU_OPT |
 		SENSOR_FAN_CHIPSET | SENSOR_CURR_CPU |
 		SENSOR_IN_CPU_CORE,
 	.mutex_path = ASUS_HW_ACCESS_MUTEX_ASMX,

-- 
2.54.0

Re: [PATCH v3] hwmon: (asus-ec-sensors) add CPU_Opt fan for ROG STRIX X570-E GAMING

[Eugene Shalygin]

On Tue, 6 Oct 2026 at 16:36, Matt Layher via B4 Relay
<devnull+mdlayher.gmail.com@kernel.org> wrote:
>
> From: Matt Layher <mdlayher@gmail.com>
>
> The board has a CPU_OPT fan header, which the EC reports at the same
> register (bank 0, 0xb0) as the other AMD 500 series boards. Enable it.
>
> Assisted-by: LLM sparse
> Signed-off-by: Matt Layher <mdlayher@gmail.com>

Reviewed-by: Eugene Shalygin <eugene.shalygin@gmail.com>

Thank you,
Eugene

Re: [PATCH v3] hwmon: (asus-ec-sensors) add CPU_Opt fan for ROG STRIX X570-E GAMING

[sashiko-bot]

> From: Matt Layher <mdlayher@gmail.com>
> 
> The board has a CPU_OPT fan header, which the EC reports at the same
> register (bank 0, 0xb0) as the other AMD 500 series boards. Enable it.
> 
> Assisted-by: LLM sparse
> Signed-off-by: Matt Layher <mdlayher@gmail.com>

Sashiko has reviewed this patch and found no issues. It looks great!

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20261006-asus-ec-x570e-cpu-opt-v3-1-62672edc18b3@gmail.com?part=1