[0/3] Export the target RPM fan control by ChromeOS EC under hwmon

Message

Sung-Chi Li March 13, 2025, 4:47 a.m. UTC

ChromeOS embedded controller (EC) supports closed-loop fan control. We
anticipate to have the fan related control from the kernel side, so this
series register the HWMON_F_TARGET attribute, and implement the read and
write function for setting/reading the target fan RPM from the EC side.

Signed-off-by: Sung-Chi Li <[e-mail]>
---
Sung-Chi Li (3):
      hwmon: (cros_ec) Add setting target fan RPM function
      hwmon: (cros_ec) Add reading target fan RPM function
      hwmon: (cros_ec) Register fan target attribute

 drivers/hwmon/cros_ec_hwmon.c | 69 +++++++++++++++++++++++++++++++++++++++----
 1 file changed, 64 insertions(+), 5 deletions(-)
---
base-commit: 9fbcd7b32bf7c0a5bda0f22c25df29d00a872017
change-id: 20250313-extend_ec_hwmon_fan-a5f59aab2cb3

Best regards,

Comments

Thomas Weißschuh March 13, 2025, 4:16 p.m. UTC | #1

Hi Sung-Chi,

On 2025-03-13 12:47:41+0800, Sung-Chi Li wrote:
> ChromeOS embedded controller (EC) supports closed-loop fan control. We
> anticipate to have the fan related control from the kernel side, so this
> series register the HWMON_F_TARGET attribute, and implement the read and
> write function for setting/reading the target fan RPM from the EC side.

In general the idea is fine. I'll post some comments for the patches.

The series should be squashed into a single patch. All the new code is
closely related to each other.

> Signed-off-by: Sung-Chi Li <[e-mail]>
> ---
> Sung-Chi Li (3):
>       hwmon: (cros_ec) Add setting target fan RPM function
>       hwmon: (cros_ec) Add reading target fan RPM function
>       hwmon: (cros_ec) Register fan target attribute
> 
>  drivers/hwmon/cros_ec_hwmon.c | 69 +++++++++++++++++++++++++++++++++++++++----
>  1 file changed, 64 insertions(+), 5 deletions(-)
> ---
> base-commit: 9fbcd7b32bf7c0a5bda0f22c25df29d00a872017
> change-id: 20250313-extend_ec_hwmon_fan-a5f59aab2cb3
> 
> Best regards,
> -- 
> Sung-Chi Li <[e-mail]>