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path: root/drivers/hwmon/lm80.c
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Diffstat (limited to 'drivers/hwmon/lm80.c')
-rw-r--r--drivers/hwmon/lm80.c132
1 files changed, 101 insertions, 31 deletions
diff --git a/drivers/hwmon/lm80.c b/drivers/hwmon/lm80.c
index 0891b38ffec0..616f470c38b3 100644
--- a/drivers/hwmon/lm80.c
+++ b/drivers/hwmon/lm80.c
@@ -170,6 +170,8 @@ static ssize_t show_in_##suffix(struct device *dev, \
{ \
int nr = to_sensor_dev_attr(attr)->index; \
struct lm80_data *data = lm80_update_device(dev); \
+ if (IS_ERR(data)) \
+ return PTR_ERR(data); \
return sprintf(buf, "%d\n", IN_FROM_REG(data->value[nr])); \
}
show_in(min, in_min)
@@ -200,6 +202,8 @@ static ssize_t show_fan_##suffix(struct device *dev, \
{ \
int nr = to_sensor_dev_attr(attr)->index; \
struct lm80_data *data = lm80_update_device(dev); \
+ if (IS_ERR(data)) \
+ return PTR_ERR(data); \
return sprintf(buf, "%d\n", FAN_FROM_REG(data->value[nr], \
DIV_FROM_REG(data->fan_div[nr]))); \
}
@@ -211,6 +215,8 @@ static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
{
int nr = to_sensor_dev_attr(attr)->index;
struct lm80_data *data = lm80_update_device(dev);
+ if (IS_ERR(data))
+ return PTR_ERR(data);
return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
}
@@ -283,6 +289,8 @@ static ssize_t show_temp_input1(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct lm80_data *data = lm80_update_device(dev);
+ if (IS_ERR(data))
+ return PTR_ERR(data);
return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp));
}
@@ -291,6 +299,8 @@ static ssize_t show_temp_##suffix(struct device *dev, \
struct device_attribute *attr, char *buf) \
{ \
struct lm80_data *data = lm80_update_device(dev); \
+ if (IS_ERR(data)) \
+ return PTR_ERR(data); \
return sprintf(buf, "%d\n", TEMP_LIMIT_FROM_REG(data->value)); \
}
show_temp(hot_max, temp_hot_max);
@@ -321,6 +331,8 @@ static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct lm80_data *data = lm80_update_device(dev);
+ if (IS_ERR(data))
+ return PTR_ERR(data);
return sprintf(buf, "%u\n", data->alarms);
}
@@ -329,6 +341,8 @@ static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
{
int bitnr = to_sensor_dev_attr(attr)->index;
struct lm80_data *data = lm80_update_device(dev);
+ if (IS_ERR(data))
+ return PTR_ERR(data);
return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
}
@@ -563,50 +577,106 @@ static struct lm80_data *lm80_update_device(struct device *dev)
struct i2c_client *client = to_i2c_client(dev);
struct lm80_data *data = i2c_get_clientdata(client);
int i;
+ int rv;
+ int prev_rv;
+ struct lm80_data *ret = data;
mutex_lock(&data->update_lock);
if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
dev_dbg(&client->dev, "Starting lm80 update\n");
for (i = 0; i <= 6; i++) {
- data->in[i] =
- lm80_read_value(client, LM80_REG_IN(i));
- data->in_min[i] =
- lm80_read_value(client, LM80_REG_IN_MIN(i));
- data->in_max[i] =
- lm80_read_value(client, LM80_REG_IN_MAX(i));
+ rv = lm80_read_value(client, LM80_REG_IN(i));
+ if (rv < 0)
+ goto abort;
+ data->in[i] = rv;
+
+ rv = lm80_read_value(client, LM80_REG_IN_MIN(i));
+ if (rv < 0)
+ goto abort;
+ data->in_min[i] = rv;
+
+ rv = lm80_read_value(client, LM80_REG_IN_MAX(i));
+ if (rv < 0)
+ goto abort;
+ data->in_max[i] = rv;
}
- data->fan[0] = lm80_read_value(client, LM80_REG_FAN1);
- data->fan_min[0] =
- lm80_read_value(client, LM80_REG_FAN_MIN(1));
- data->fan[1] = lm80_read_value(client, LM80_REG_FAN2);
- data->fan_min[1] =
- lm80_read_value(client, LM80_REG_FAN_MIN(2));
-
- data->temp =
- (lm80_read_value(client, LM80_REG_TEMP) << 8) |
- (lm80_read_value(client, LM80_REG_RES) & 0xf0);
- data->temp_os_max =
- lm80_read_value(client, LM80_REG_TEMP_OS_MAX);
- data->temp_os_hyst =
- lm80_read_value(client, LM80_REG_TEMP_OS_HYST);
- data->temp_hot_max =
- lm80_read_value(client, LM80_REG_TEMP_HOT_MAX);
- data->temp_hot_hyst =
- lm80_read_value(client, LM80_REG_TEMP_HOT_HYST);
-
- i = lm80_read_value(client, LM80_REG_FANDIV);
- data->fan_div[0] = (i >> 2) & 0x03;
- data->fan_div[1] = (i >> 4) & 0x03;
- data->alarms = lm80_read_value(client, LM80_REG_ALARM1) +
- (lm80_read_value(client, LM80_REG_ALARM2) << 8);
+
+ rv = lm80_read_value(client, LM80_REG_FAN1);
+ if (rv < 0)
+ goto abort;
+ data->fan[0] = rv;
+
+ rv = lm80_read_value(client, LM80_REG_FAN_MIN(1));
+ if (rv < 0)
+ goto abort;
+ data->fan_min[0] = rv;
+
+ rv = lm80_read_value(client, LM80_REG_FAN2);
+ if (rv < 0)
+ goto abort;
+ data->fan[1] = rv;
+
+ rv = lm80_read_value(client, LM80_REG_FAN_MIN(2));
+ if (rv < 0)
+ goto abort;
+ data->fan_min[1] = rv;
+
+ prev_rv = rv = lm80_read_value(client, LM80_REG_TEMP);
+ if (rv < 0)
+ goto abort;
+ rv = lm80_read_value(client, LM80_REG_RES);
+ if (rv < 0)
+ goto abort;
+ data->temp = (prev_rv << 8) | (rv & 0xf0);
+
+ rv = lm80_read_value(client, LM80_REG_TEMP_OS_MAX);
+ if (rv < 0)
+ goto abort;
+ data->temp_os_max = rv;
+
+ rv = lm80_read_value(client, LM80_REG_TEMP_OS_HYST);
+ if (rv < 0)
+ goto abort;
+ data->temp_os_hyst = rv;
+
+ rv = lm80_read_value(client, LM80_REG_TEMP_HOT_MAX);
+ if (rv < 0)
+ goto abort;
+ data->temp_hot_max = rv;
+
+ rv = lm80_read_value(client, LM80_REG_TEMP_HOT_HYST);
+ if (rv < 0)
+ goto abort;
+ data->temp_hot_hyst = rv;
+
+ rv = lm80_read_value(client, LM80_REG_FANDIV);
+ if (rv < 0)
+ goto abort;
+ data->fan_div[0] = (rv >> 2) & 0x03;
+ data->fan_div[1] = (rv >> 4) & 0x03;
+
+ prev_rv = rv = lm80_read_value(client, LM80_REG_ALARM1);
+ if (rv < 0)
+ goto abort;
+ rv = lm80_read_value(client, LM80_REG_ALARM2);
+ if (rv < 0)
+ goto abort;
+ data->alarms = prev_rv + (rv << 8);
+
data->last_updated = jiffies;
data->valid = 1;
}
+ goto done;
+
+abort:
+ ret = ERR_PTR(rv);
+ data->valid = 0;
+done:
mutex_unlock(&data->update_lock);
- return data;
+ return ret;
}
static int __init sensors_lm80_init(void)
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-02 18:57:19 +0100