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authorGuenter Roeck <linux@roeck-us.net>2012-12-19 22:17:01 +0100
committerJean Delvare <khali@endymion.delvare>2012-12-19 22:17:01 +0100
commit161d898ac974818156afe48d755578bfd0d6e7c0 (patch)
treea6e6b76494ec02219f2b701c0b2103e7ff1777aa /drivers/hwmon
parent2cece01ffd622ab65a4f5a6704e3a74c1174d2fa (diff)
downloadlinux-161d898ac974818156afe48d755578bfd0d6e7c0.tar.bz2
hwmon: (it87) Introduce support for tempX_offset sysfs attribute
Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'drivers/hwmon')
-rw-r--r--drivers/hwmon/it87.c66
1 files changed, 61 insertions, 5 deletions
diff --git a/drivers/hwmon/it87.c b/drivers/hwmon/it87.c
index 21fb7f24152c..767563269182 100644
--- a/drivers/hwmon/it87.c
+++ b/drivers/hwmon/it87.c
@@ -203,6 +203,8 @@ static const u8 IT87_REG_FAN[] = { 0x0d, 0x0e, 0x0f, 0x80, 0x82 };
static const u8 IT87_REG_FAN_MIN[] = { 0x10, 0x11, 0x12, 0x84, 0x86 };
static const u8 IT87_REG_FANX[] = { 0x18, 0x19, 0x1a, 0x81, 0x83 };
static const u8 IT87_REG_FANX_MIN[] = { 0x1b, 0x1c, 0x1d, 0x85, 0x87 };
+static const u8 IT87_REG_TEMP_OFFSET[] = { 0x56, 0x57, 0x59 };
+
#define IT87_REG_FAN_MAIN_CTRL 0x13
#define IT87_REG_FAN_CTL 0x14
#define IT87_REG_PWM(nr) (0x15 + (nr))
@@ -263,7 +265,7 @@ struct it87_data {
u16 fan[5]; /* Register values, possibly combined */
u16 fan_min[5]; /* Register values, possibly combined */
u8 has_temp; /* Bitfield, temp sensors enabled */
- s8 temp[3][3]; /* [nr][0]=temp, [1]=min, [2]=max */
+ s8 temp[3][4]; /* [nr][0]=temp, [1]=min, [2]=max, [3]=offset */
u8 sensor; /* Register value */
u8 fan_div[3]; /* Register encoding, shifted right */
u8 vid; /* Register encoding, combined */
@@ -312,6 +314,17 @@ static inline int has_newer_autopwm(const struct it87_data *data)
|| data->type == it8728;
}
+static inline int has_temp_offset(const struct it87_data *data)
+{
+ return data->type == it8716
+ || data->type == it8718
+ || data->type == it8720
+ || data->type == it8721
+ || data->type == it8728
+ || data->type == it8782
+ || data->type == it8783;
+}
+
static int adc_lsb(const struct it87_data *data, int nr)
{
int lsb = has_12mv_adc(data) ? 12 : 16;
@@ -546,16 +559,34 @@ static ssize_t set_temp(struct device *dev, struct device_attribute *attr,
int index = sattr->index;
struct it87_data *data = dev_get_drvdata(dev);
long val;
+ u8 reg, regval;
if (kstrtol(buf, 10, &val) < 0)
return -EINVAL;
mutex_lock(&data->update_lock);
+
+ switch (index) {
+ default:
+ case 1:
+ reg = IT87_REG_TEMP_LOW(nr);
+ break;
+ case 2:
+ reg = IT87_REG_TEMP_HIGH(nr);
+ break;
+ case 3:
+ regval = it87_read_value(data, IT87_REG_BEEP_ENABLE);
+ if (!(regval & 0x80)) {
+ regval |= 0x80;
+ it87_write_value(data, IT87_REG_BEEP_ENABLE, regval);
+ }
+ data->valid = 0;
+ reg = IT87_REG_TEMP_OFFSET[nr];
+ break;
+ }
+
data->temp[nr][index] = TEMP_TO_REG(val);
- it87_write_value(data,
- index == 1 ? IT87_REG_TEMP_LOW(nr)
- : IT87_REG_TEMP_HIGH(nr),
- data->temp[nr][index]);
+ it87_write_value(data, reg, data->temp[nr][index]);
mutex_unlock(&data->update_lock);
return count;
}
@@ -565,16 +596,22 @@ static SENSOR_DEVICE_ATTR_2(temp1_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
0, 1);
static SENSOR_DEVICE_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
0, 2);
+static SENSOR_DEVICE_ATTR_2(temp1_offset, S_IRUGO | S_IWUSR, show_temp,
+ set_temp, 0, 3);
static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 1, 0);
static SENSOR_DEVICE_ATTR_2(temp2_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
1, 1);
static SENSOR_DEVICE_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
1, 2);
+static SENSOR_DEVICE_ATTR_2(temp2_offset, S_IRUGO | S_IWUSR, show_temp,
+ set_temp, 1, 3);
static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp, NULL, 2, 0);
static SENSOR_DEVICE_ATTR_2(temp3_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
2, 1);
static SENSOR_DEVICE_ATTR_2(temp3_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
2, 2);
+static SENSOR_DEVICE_ATTR_2(temp3_offset, S_IRUGO | S_IWUSR, show_temp,
+ set_temp, 2, 3);
static ssize_t show_temp_type(struct device *dev, struct device_attribute *attr,
char *buf)
@@ -1429,6 +1466,12 @@ static const struct attribute_group it87_group_temp[3] = {
{ .attrs = it87_attributes_temp[2] },
};
+static struct attribute *it87_attributes_temp_offset[] = {
+ &sensor_dev_attr_temp1_offset.dev_attr.attr,
+ &sensor_dev_attr_temp2_offset.dev_attr.attr,
+ &sensor_dev_attr_temp3_offset.dev_attr.attr,
+};
+
static struct attribute *it87_attributes[] = {
&dev_attr_alarms.attr,
&sensor_dev_attr_intrusion0_alarm.dev_attr.attr,
@@ -1899,6 +1942,9 @@ static void it87_remove_files(struct device *dev)
if (!(data->has_temp & (1 << i)))
continue;
sysfs_remove_group(&dev->kobj, &it87_group_temp[i]);
+ if (has_temp_offset(data))
+ sysfs_remove_file(&dev->kobj,
+ it87_attributes_temp_offset[i]);
if (sio_data->beep_pin)
sysfs_remove_file(&dev->kobj,
it87_attributes_temp_beep[i]);
@@ -2026,6 +2072,12 @@ static int it87_probe(struct platform_device *pdev)
err = sysfs_create_group(&dev->kobj, &it87_group_temp[i]);
if (err)
goto error;
+ if (has_temp_offset(data)) {
+ err = sysfs_create_file(&dev->kobj,
+ it87_attributes_temp_offset[i]);
+ if (err)
+ goto error;
+ }
if (sio_data->beep_pin) {
err = sysfs_create_file(&dev->kobj,
it87_attributes_temp_beep[i]);
@@ -2383,6 +2435,10 @@ static struct it87_data *it87_update_device(struct device *dev)
it87_read_value(data, IT87_REG_TEMP_LOW(i));
data->temp[i][2] =
it87_read_value(data, IT87_REG_TEMP_HIGH(i));
+ if (has_temp_offset(data))
+ data->temp[i][3] =
+ it87_read_value(data,
+ IT87_REG_TEMP_OFFSET[i]);
}
/* Newer chips don't have clock dividers */