hwmon: (lm63) Add support for unsigned upper temperature limits
LM96163 supports unsigned upper limits for the external temperature sensor.
Add support for it.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
diff --git a/drivers/hwmon/lm63.c b/drivers/hwmon/lm63.c
index 3d882c9..24a96f8 100644
--- a/drivers/hwmon/lm63.c
+++ b/drivers/hwmon/lm63.c
@@ -92,6 +92,8 @@
#define LM63_REG_MAN_ID 0xFE
#define LM63_REG_CHIP_ID 0xFF
+#define LM96163_REG_REMOTE_TEMP_U_MSB 0x31
+#define LM96163_REG_REMOTE_TEMP_U_LSB 0x32
#define LM96163_REG_CONFIG_ENHANCED 0x45
/*
@@ -120,6 +122,9 @@
(val) >= 127875 ? 0x7FE0 : \
(val) < 0 ? ((val) - 62) / 125 * 32 : \
((val) + 62) / 125 * 32)
+#define TEMP11U_TO_REG(val) ((val) <= 0 ? 0 : \
+ (val) >= 255875 ? 0xFFE0 : \
+ ((val) + 62) / 125 * 32)
#define HYST_TO_REG(val) ((val) <= 0 ? 0 : \
(val) >= 127000 ? 127 : \
((val) + 500) / 1000)
@@ -188,11 +193,20 @@
1: remote low limit
2: remote high limit
3: remote offset */
+ u16 temp11u; /* remote input (unsigned) */
u8 temp2_crit_hyst;
u8 alarms;
bool pwm_highres;
+ bool remote_unsigned; /* true if unsigned remote upper limits */
};
+static inline int temp8_from_reg(struct lm63_data *data, int nr)
+{
+ if (data->remote_unsigned)
+ return TEMP8_FROM_REG((u8)data->temp8[nr]);
+ return TEMP8_FROM_REG(data->temp8[nr]);
+}
+
/*
* Sysfs callback functions and files
*/
@@ -295,7 +309,7 @@
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct lm63_data *data = lm63_update_device(dev);
- return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[attr->index])
+ return sprintf(buf, "%d\n", temp8_from_reg(data, attr->index)
+ data->temp2_offset);
}
@@ -324,8 +338,25 @@
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct lm63_data *data = lm63_update_device(dev);
- return sprintf(buf, "%d\n", TEMP11_FROM_REG(data->temp11[attr->index])
- + data->temp2_offset);
+ int nr = attr->index;
+ int temp;
+
+ if (!nr) {
+ /*
+ * Use unsigned temperature unless its value is zero.
+ * If it is zero, use signed temperature.
+ */
+ if (data->temp11u)
+ temp = TEMP11_FROM_REG(data->temp11u);
+ else
+ temp = TEMP11_FROM_REG(data->temp11[nr]);
+ } else {
+ if (data->remote_unsigned && nr == 2)
+ temp = TEMP11_FROM_REG((u16)data->temp11[nr]);
+ else
+ temp = TEMP11_FROM_REG(data->temp11[nr]);
+ }
+ return sprintf(buf, "%d\n", temp + data->temp2_offset);
}
static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr,
@@ -352,7 +383,11 @@
return err;
mutex_lock(&data->update_lock);
- data->temp11[nr] = TEMP11_TO_REG(val - data->temp2_offset);
+ if (data->remote_unsigned && nr == 2)
+ data->temp11[nr] = TEMP11U_TO_REG(val - data->temp2_offset);
+ else
+ data->temp11[nr] = TEMP11_TO_REG(val - data->temp2_offset);
+
i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2],
data->temp11[nr] >> 8);
i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1],
@@ -369,7 +404,7 @@
struct device_attribute *dummy, char *buf)
{
struct lm63_data *data = lm63_update_device(dev);
- return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[2])
+ return sprintf(buf, "%d\n", temp8_from_reg(data, 2)
+ data->temp2_offset
- TEMP8_FROM_REG(data->temp2_crit_hyst));
}
@@ -393,7 +428,7 @@
return err;
mutex_lock(&data->update_lock);
- hyst = TEMP8_FROM_REG(data->temp8[2]) + data->temp2_offset - val;
+ hyst = temp8_from_reg(data, 2) + data->temp2_offset - val;
i2c_smbus_write_byte_data(client, LM63_REG_REMOTE_TCRIT_HYST,
HYST_TO_REG(hyst));
mutex_unlock(&data->update_lock);
@@ -620,9 +655,8 @@
data->pwm1_freq = 1;
/*
- * For LM96163, check if high resolution PWM is enabled.
- * Also, check if unsigned temperature format is enabled
- * and display a warning message if it is.
+ * For LM96163, check if high resolution PWM
+ * and unsigned temperature format is enabled.
*/
if (data->kind == lm96163) {
u8 config_enhanced
@@ -632,8 +666,7 @@
&& !(data->config_fan & 0x08) && data->pwm1_freq == 8)
data->pwm_highres = true;
if (config_enhanced & 0x08)
- dev_warn(&client->dev,
- "Unsigned format for High and Crit setpoints enabled but not supported by driver\n");
+ data->remote_unsigned = true;
}
/* Show some debug info about the LM63 configuration */
@@ -709,6 +742,13 @@
LM63_REG_REMOTE_OFFSET_MSB) << 8)
| i2c_smbus_read_byte_data(client,
LM63_REG_REMOTE_OFFSET_LSB);
+
+ if (data->kind == lm96163)
+ data->temp11u = (i2c_smbus_read_byte_data(client,
+ LM96163_REG_REMOTE_TEMP_U_MSB) << 8)
+ | i2c_smbus_read_byte_data(client,
+ LM96163_REG_REMOTE_TEMP_U_LSB);
+
data->temp8[2] = i2c_smbus_read_byte_data(client,
LM63_REG_REMOTE_TCRIT);
data->temp2_crit_hyst = i2c_smbus_read_byte_data(client,