firmware: arm_scmi: Add new sensor unit types

Add support for two new sensor unit types introduced in Arm SCMI
- STATE_BINARY (0x5E): Binary state (1: enabled/on, 0: disabled/off)
- BYTES_SEC (0x5F): Bytes per second

These unit types are used for sensors that report binary state information and data transfer rate measurements respectively.

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Hello,

This patch adds definitions for two new sensor unit types that were introduced in the Arm System Control and Management Interface (SCMI) Specification version 4.0:

STATE_BINARY (0x5E) - Used for sensors that represent binary states where:
1 indicates enabled/on state
0 indicates disabled/off state

BYTES_SEC (0x5F) - Used for sensors that measure data transfer rates in bytes per second

These additions ensure compatibility with SCMIv4.0 and allow proper handling of binary state sensors and bandwidth measurement sensors in the Linux SCMI driver.

The patch follows the existing pattern for sensor unit type definitions and maintains backward compatibility with previous SCMI versions.

Thank you for your consideration.

Best regards,
Artem Shimko

 include/linux/scmi_protocol.h | 2 ++
 1 file changed, 2 insertions(+)

index aafaac1496b0..629acb7831eb 100644
@@ -488,6 +488,8 @@ enum scmi_sensor_class {
 	CUBIC_METERS_SEC = 0x5B,
 	MM_MERCURY = 0x5C,
 	RADIANS_SEC_SQUARED = 0x5D,
+	STATE_BINARY = 0x5E,
+	BYTES_SEC = 0x5F,
 	OEM_UNIT = 0xFF
 };
 

2.43.0

It is still alpha, we don't add anything into the kernel unless it is of beta quality. Do you have a use or you are just adding to match the spec ?

Regards,
Sudeep

Hi Sudeep,

I'm adding it to meet the specifications.

Trying to be useful

Thank you.

Best regards,
Artem

Hi Sudeep,

Just a polite ping.

Is it still too early for 4.0 bet0?

Thank you!

Regards,
Artem

v4.0 beta is out but I would take this with telemetry support that may start using this. Let me know if there are any users before that.

Regards,
Sudeep

Hi Sudeep,

There are no users before that.

Thank you!

Regards,
Artem