| Message ID | 20190508170035.19671-2-f.fainelli@gmail.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | hwmon: scmi: Scale values to target desired HWMON units | expand |
On Wed, May 08, 2019 at 10:00:34AM -0700, Florian Fainelli wrote: > 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. > > Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> > --- > drivers/firmware/arm_scmi/sensors.c | 6 ++++++ > include/linux/scmi_protocol.h | 1 + > 2 files changed, 7 insertions(+) > > diff --git a/drivers/firmware/arm_scmi/sensors.c b/drivers/firmware/arm_scmi/sensors.c > index b53d5cc9c9f6..21353470a740 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) & 0x3f) > +#define SENSOR_SCALE_SIGN BIT(5) > +#define SENSOR_SCALE_EXTEND GENMASK(7, 6) > #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); > } > > diff --git a/include/linux/scmi_protocol.h b/include/linux/scmi_protocol.h > index 3105055c00a7..9ff2e9357e9a 100644 > --- a/include/linux/scmi_protocol.h > +++ b/include/linux/scmi_protocol.h > @@ -144,6 +144,7 @@ struct scmi_power_ops { > struct scmi_sensor_info { > u32 id; > u8 type; > + s8 scale; > char name[SCMI_MAX_STR_SIZE]; > }; > > -- > 2.17.1 >
diff --git a/drivers/firmware/arm_scmi/sensors.c b/drivers/firmware/arm_scmi/sensors.c index b53d5cc9c9f6..21353470a740 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) & 0x3f) +#define SENSOR_SCALE_SIGN BIT(5) +#define SENSOR_SCALE_EXTEND GENMASK(7, 6) #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); } diff --git a/include/linux/scmi_protocol.h b/include/linux/scmi_protocol.h index 3105055c00a7..9ff2e9357e9a 100644 --- a/include/linux/scmi_protocol.h +++ b/include/linux/scmi_protocol.h @@ -144,6 +144,7 @@ struct scmi_power_ops { struct scmi_sensor_info { u32 id; u8 type; + s8 scale; char name[SCMI_MAX_STR_SIZE]; };
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. Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> --- drivers/firmware/arm_scmi/sensors.c | 6 ++++++ include/linux/scmi_protocol.h | 1 + 2 files changed, 7 insertions(+)