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hwmon: (occ) Add new temperature sensor type 

The latest version of the On-Chip Controller (OCC) has a different
format for the temperature sensor data. Add a new temperature sensor
version to handle this data.

Signed-off-by: Eddie James <eajames@linux.ibm.com>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Joel Stanley <joel@jms.id.au>
Link: https://lore.kernel.org/r/20201120010315.190737-4-joel@jms.id.au
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
zero-sugar-mainline-defconfig
Eddie James 2020-11-20 11:33:15 +10:30 committed by Guenter Roeck
parent 5ec96d74cf
commit db4919ec86
1 changed files with 75 additions and 0 deletions
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75
drivers/hwmon/occ/common.c
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@ -41,6 +41,14 @@ struct temp_sensor_2 {
u8 value;
} __packed;
struct temp_sensor_10 {
u32 sensor_id;
u8 fru_type;
u8 value;
u8 throttle;
u8 reserved;
} __packed;
struct freq_sensor_1 {
u16 sensor_id;
u16 value;
@ -307,6 +315,60 @@ static ssize_t occ_show_temp_2(struct device *dev,
return snprintf(buf, PAGE_SIZE - 1, "%u\n", val);
}
static ssize_t occ_show_temp_10(struct device *dev,
struct device_attribute *attr, char *buf)
{
int rc;
u32 val = 0;
struct temp_sensor_10 *temp;
struct occ *occ = dev_get_drvdata(dev);
struct occ_sensors *sensors = &occ->sensors;
struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
rc = occ_update_response(occ);
if (rc)
return rc;
temp = ((struct temp_sensor_10 *)sensors->temp.data) + sattr->index;
switch (sattr->nr) {
case 0:
val = get_unaligned_be32(&temp->sensor_id);
break;
case 1:
val = temp->value;
if (val == OCC_TEMP_SENSOR_FAULT)
return -EREMOTEIO;
/*
* VRM doesn't return temperature, only alarm bit. This
* attribute maps to tempX_alarm instead of tempX_input for
* VRM
*/
if (temp->fru_type != OCC_FRU_TYPE_VRM) {
/* sensor not ready */
if (val == 0)
return -EAGAIN;
val *= 1000;
}
break;
case 2:
val = temp->fru_type;
break;
case 3:
val = temp->value == OCC_TEMP_SENSOR_FAULT;
break;
case 4:
val = temp->throttle * 1000;
break;
default:
return -EINVAL;
}
return snprintf(buf, PAGE_SIZE - 1, "%u\n", val);
}
static ssize_t occ_show_freq_1(struct device *dev,
struct device_attribute *attr, char *buf)
{
@ -745,6 +807,10 @@ static int occ_setup_sensor_attrs(struct occ *occ)
num_attrs += (sensors->temp.num_sensors * 4);
show_temp = occ_show_temp_2;
break;
case 0x10:
num_attrs += (sensors->temp.num_sensors * 5);
show_temp = occ_show_temp_10;
break;
default:
sensors->temp.num_sensors = 0;
}
@ -844,6 +910,15 @@ static int occ_setup_sensor_attrs(struct occ *occ)
attr->sensor = OCC_INIT_ATTR(attr->name, 0444,
show_temp, NULL, 3, i);
attr++;
if (sensors->temp.version == 0x10) {
snprintf(attr->name, sizeof(attr->name),
"temp%d_max", s);
attr->sensor = OCC_INIT_ATTR(attr->name, 0444,
show_temp, NULL,
4, i);
attr++;
}
}
}