On LM64, the remote critical temperature limit is always writable. On LM96163,
it is writable if the chip is configured for it. Add conditional support for
writing the register dependent on chip type and configuration.
Signed-off-by: Guenter Roeck <guenter.roeck@xxxxxxxxxxxx>
---
drivers/hwmon/lm63.c | 57 +++++++++++++++++++++++++++++++++++++++++++++----
1 files changed, 52 insertions(+), 5 deletions(-)
diff --git a/drivers/hwmon/lm63.c b/drivers/hwmon/lm63.c
index b2ffea9..f28b4d0 100644
--- a/drivers/hwmon/lm63.c
+++ b/drivers/hwmon/lm63.c
@@ -117,6 +117,9 @@ static const unsigned short normal_i2c[] = { 0x18, 0x4c, 0x4e, I2C_CLIENT_END };
(val) >= 127000 ? 127 : \
(val) < 0 ? ((val) - 500) / 1000 : \
((val) + 500) / 1000)
+#define TEMP8U_TO_REG(val) ((val) <= 0 ? 0 : \
+ (val) >= 255000 ? 255 : \
+ ((val) + 500) / 1000)
#define TEMP11_FROM_REG(reg) ((reg) / 32 * 125)
#define TEMP11_TO_REG(val) ((val) <= -128000 ? 0x8000 : \
(val) >= 127875 ? 0x7FE0 : \
@@ -333,6 +336,31 @@ static ssize_t set_local_temp8(struct device *dev,
return count;
}
+static ssize_t set_remote_temp8(struct device *dev,
+ struct device_attribute *devattr,
+ const char *buf, size_t count)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct lm63_data *data = i2c_get_clientdata(client);
+ long val;
+ int err;
+
+ err = kstrtol(buf, 10, &val);
+ if (err)
+ return err;
+
+ mutex_lock(&data->update_lock);
+ if (data->remote_unsigned)
+ data->temp8[2] = TEMP8U_TO_REG(val - data->temp2_offset);
+ else
+ data->temp8[2] = TEMP8_TO_REG(val - data->temp2_offset);
+
+ i2c_smbus_write_byte_data(client, LM63_REG_REMOTE_TCRIT,
+ data->temp8[2]);
+ mutex_unlock(&data->update_lock);
+ return count;
+}
+
static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr,
char *buf)
{
@@ -470,12 +498,8 @@ 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.
- */
static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_remote_temp8,
- NULL, 2);
+ set_remote_temp8, 2);
static DEVICE_ATTR(temp2_crit_hyst, S_IWUSR | S_IRUGO, show_temp2_crit_hyst,
set_temp2_crit_hyst);
@@ -510,7 +534,30 @@ static struct attribute *lm63_attributes[] = {
NULL
};
+/*
+ * On LM63, temp2_crit can be set only once, which should be job
+ * of the bootloader.
+ * On LM64, temp2_crit can always be set.
+ * On LM96163, temp2_crit can be set if bit 1 of the configuration
+ * register is true.
+ */
+static mode_t lm63_attribute_mode(struct kobject *kobj,
+ struct attribute *attr, int index)
+{
+ struct device *dev = container_of(kobj, struct device, kobj);
+ struct i2c_client *client = to_i2c_client(dev);
+ struct lm63_data *data = i2c_get_clientdata(client);
+
+ if (attr == &sensor_dev_attr_temp2_crit.dev_attr.attr
+ && (data->kind == lm64 || (data->kind == lm96163
+ && (data->config & 0x02))))
+ return attr->mode | S_IWUSR;
+
+ return attr->mode;
+}
+
static const struct attribute_group lm63_group = {
+ .is_visible = lm63_attribute_mode,
.attrs = lm63_attributes,
};
--
1.7.3.1
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