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| author | Florian Fainelli <f.fainelli@gmail.com> | 2019-05-08 11:46:34 -0700 |
|---|---|---|
| committer | Sudeep Holla <sudeep.holla@arm.com> | 2019-06-12 12:29:20 +0100 |
| commit | 0b673b6486998061b0489b09447ebe8452da0146 (patch) | |
| tree | 3ca308c1d9df498af76ddab98e9f245c6038cd41 /drivers/firmware/arm_scmi | |
| parent | c0759b9b5d411ab27c479125cee9bae391a96436 (diff) | |
| download | linux-0b673b6486998061b0489b09447ebe8452da0146.tar.bz2 | |
firmware: arm_scmi: fetch and store sensor scale
In preparation for dealing with scales within the SCMI HWMON driver,
fetch and store the sensor unit scale into the scmi_sensor_info
structure. In order to simplify computations for upper layer, take care
of sign extending the scale to a full 8-bit signed value.
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
[sudeep.holla: update bitfield values as per specification]
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Diffstat (limited to 'drivers/firmware/arm_scmi')
| -rw-r--r-- | drivers/firmware/arm_scmi/sensors.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/firmware/arm_scmi/sensors.c b/drivers/firmware/arm_scmi/sensors.c index c00287b5f2c2..0e94ab56f679 100644 --- a/drivers/firmware/arm_scmi/sensors.c +++ b/drivers/firmware/arm_scmi/sensors.c @@ -34,6 +34,8 @@ struct scmi_msg_resp_sensor_description { __le32 attributes_high; #define SENSOR_TYPE(x) ((x) & 0xff) #define SENSOR_SCALE(x) (((x) >> 11) & 0x1f) +#define SENSOR_SCALE_SIGN BIT(4) +#define SENSOR_SCALE_EXTEND GENMASK(7, 5) #define SENSOR_UPDATE_SCALE(x) (((x) >> 22) & 0x1f) #define SENSOR_UPDATE_BASE(x) (((x) >> 27) & 0x1f) u8 name[SCMI_MAX_STR_SIZE]; @@ -140,6 +142,10 @@ static int scmi_sensor_description_get(const struct scmi_handle *handle, s = &si->sensors[desc_index + cnt]; s->id = le32_to_cpu(buf->desc[cnt].id); s->type = SENSOR_TYPE(attrh); + s->scale = SENSOR_SCALE(attrh); + /* Sign extend to a full s8 */ + if (s->scale & SENSOR_SCALE_SIGN) + s->scale |= SENSOR_SCALE_EXTEND; strlcpy(s->name, buf->desc[cnt].name, SCMI_MAX_STR_SIZE); } |