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| author | Guenter Roeck <linux@roeck-us.net> | 2016-07-04 06:46:31 -0700 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2016-09-08 21:34:14 -0700 |
| commit | 090a7f8efe0be34e837d51ef27f6232356ecabf6 (patch) | |
| tree | 9d6a5b8a172b6db50a79f47ae9aeaa8b0ace2e3b /drivers/hwmon/lm95241.c | |
| parent | f48ccb26e264b112afc087d562fa2d68e2e1174b (diff) | |
| download | linux-090a7f8efe0be34e837d51ef27f6232356ecabf6.tar.gz linux-090a7f8efe0be34e837d51ef27f6232356ecabf6.tar.bz2 linux-090a7f8efe0be34e837d51ef27f6232356ecabf6.zip | |
hwmon: (lm95241) Add support for fault attributes
The chip reports if remote diodes are present, which can be used for
the fault attrributes.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/hwmon/lm95241.c')
| -rw-r--r-- | drivers/hwmon/lm95241.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/drivers/hwmon/lm95241.c b/drivers/hwmon/lm95241.c index a8cf666fe661..e4e7bf169b07 100644 --- a/drivers/hwmon/lm95241.c +++ b/drivers/hwmon/lm95241.c @@ -70,6 +70,8 @@ static const unsigned short normal_i2c[] = { #define R2DF_MASK (0x01 << (R2DF_SHIFT)) #define R1FE_MASK 0x01 #define R2FE_MASK 0x05 +#define R1DM 0x01 +#define R2DM 0x02 #define TT1_SHIFT 0 #define TT2_SHIFT 4 #define TT_OFF 0 @@ -97,7 +99,7 @@ struct lm95241_data { char valid; /* zero until following fields are valid */ /* registers values */ u8 temp[ARRAY_SIZE(lm95241_reg_address)]; - u8 config, model, trutherm; + u8 status, config, model, trutherm; }; /* Conversions */ @@ -130,6 +132,9 @@ static struct lm95241_data *lm95241_update_device(struct device *dev) data->temp[i] = i2c_smbus_read_byte_data(client, lm95241_reg_address[i]); + + data->status = i2c_smbus_read_byte_data(client, + LM95241_REG_R_STATUS); data->last_updated = jiffies; data->valid = 1; } @@ -274,6 +279,15 @@ static ssize_t set_max(struct device *dev, struct device_attribute *attr, return count; } +static ssize_t show_fault(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct lm95241_data *data = lm95241_update_device(dev); + + return snprintf(buf, PAGE_SIZE - 1, "%d", + !!(data->status & to_sensor_dev_attr(attr)->index)); +} + static ssize_t show_interval(struct device *dev, struct device_attribute *attr, char *buf) { @@ -335,6 +349,8 @@ static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_max, set_max, R1DF_MASK); static SENSOR_DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO, show_max, set_max, R2DF_MASK); +static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_fault, NULL, R1DM); +static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_fault, NULL, R2DM); static DEVICE_ATTR(update_interval, S_IWUSR | S_IRUGO, show_interval, set_interval); @@ -348,6 +364,8 @@ static struct attribute *lm95241_attrs[] = { &sensor_dev_attr_temp3_min.dev_attr.attr, &sensor_dev_attr_temp2_max.dev_attr.attr, &sensor_dev_attr_temp3_max.dev_attr.attr, + &sensor_dev_attr_temp2_fault.dev_attr.attr, + &sensor_dev_attr_temp3_fault.dev_attr.attr, &dev_attr_update_interval.attr, NULL }; |