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hwmon: (lm63) Add support for external temperature offset register

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LM63 and compatibles support a temperature offset register for the external
temperature sensor. Add support for it.

Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
This commit is contained in:
Guenter Roeck 2012-01-16 22:51:45 +01:00 committed by Jean Delvare
parent 662bda2832
commit 786375f729
1 changed files with 13 additions and 3 deletions
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16
drivers/hwmon/lm63.c
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@ -180,9 +180,10 @@ struct lm63_data {
s8 temp8[3]; /* 0: local input
1: local high limit
2: remote critical limit */
s16 temp11[3]; /* 0: remote input
s16 temp11[4]; /* 0: remote input
1: remote low limit
2: remote high limit */
2: remote high limit
3: remote offset */
u8 temp2_crit_hyst;
u8 alarms;
};
@ -318,11 +319,13 @@ static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr,
static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr,
const char *buf, size_t count)
{
static const u8 reg[4] = {
static const u8 reg[6] = {
LM63_REG_REMOTE_LOW_MSB,
LM63_REG_REMOTE_LOW_LSB,
LM63_REG_REMOTE_HIGH_MSB,
LM63_REG_REMOTE_HIGH_LSB,
LM63_REG_REMOTE_OFFSET_MSB,
LM63_REG_REMOTE_OFFSET_LSB,
};
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
@ -418,6 +421,8 @@ static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11,
set_temp11, 1);
static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11,
set_temp11, 2);
static SENSOR_DEVICE_ATTR(temp2_offset, S_IWUSR | S_IRUGO, show_temp11,
set_temp11, 3);
/*
* On LM63, temp2_crit can be set only once, which should be job
* of the bootloader.
@ -445,6 +450,7 @@ static struct attribute *lm63_attributes[] = {
&sensor_dev_attr_temp2_min.dev_attr.attr,
&sensor_dev_attr_temp1_max.dev_attr.attr,
&sensor_dev_attr_temp2_max.dev_attr.attr,
&sensor_dev_attr_temp2_offset.dev_attr.attr,
&sensor_dev_attr_temp2_crit.dev_attr.attr,
&dev_attr_temp2_crit_hyst.attr,
@ -668,6 +674,10 @@ static struct lm63_data *lm63_update_device(struct device *dev)
LM63_REG_REMOTE_HIGH_MSB) << 8)
| i2c_smbus_read_byte_data(client,
LM63_REG_REMOTE_HIGH_LSB);
data->temp11[3] = (i2c_smbus_read_byte_data(client,
LM63_REG_REMOTE_OFFSET_MSB) << 8)
| i2c_smbus_read_byte_data(client,
LM63_REG_REMOTE_OFFSET_LSB);
data->temp8[2] = i2c_smbus_read_byte_data(client,
LM63_REG_REMOTE_TCRIT);
data->temp2_crit_hyst = i2c_smbus_read_byte_data(client,