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When changing fan divisor(s), save and restore fan minimum(s).

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git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@1941 7894878c-1315-0410-8ee3-d5d059ff63e0
This commit is contained in:
Mark M. Hoffman committed 2003-08-06 04:37:12 +00:00
1 parent 69ef356b2c
commit 3629850def
1 file changed
+17 -1
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kernel/chips/lm78.c
+17 -1
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@@ -769,11 +769,15 @@ void lm78_alarms(struct i2c_client *client, int operation, int ctl_name,
}
}
/* Note: we save and restore the fan minimum here, because its value is
determined in part by the fan divisor. This follows the principle of
least surprise: the user doesn't expect the fan minimum to change just
because the divisor changed. */
void lm78_fan_div(struct i2c_client *client, int operation, int ctl_name,
int *nrels_mag, long *results)
{
struct lm78_data *data = client->data;
int old;
int old, min;
if (operation == SENSORS_PROC_REAL_INFO)
*nrels_mag = 0;
@@ -786,12 +790,24 @@ void lm78_fan_div(struct i2c_client *client, int operation, int ctl_name,
} else if (operation == SENSORS_PROC_REAL_WRITE) {
old = lm78_read_value(client, LM78_REG_VID_FANDIV);
if (*nrels_mag >= 2) {
min = FAN_FROM_REG(data->fan_min[1],
DIV_FROM_REG(data->fan_div[1]));
data->fan_div[1] = DIV_TO_REG(results[1]);
old = (old & 0x3f) | (data->fan_div[1] << 6);
data->fan_min[1] = FAN_TO_REG(min,
DIV_FROM_REG(data->fan_div[1]));
lm78_write_value(client, LM78_REG_FAN_MIN(2),
data->fan_min[1]);
}
if (*nrels_mag >= 1) {
min = FAN_FROM_REG(data->fan_min[0],
DIV_FROM_REG(data->fan_div[0]));
data->fan_div[0] = DIV_TO_REG(results[0]);
old = (old & 0xcf) | (data->fan_div[0] << 4);
data->fan_min[0] = FAN_TO_REG(min,
DIV_FROM_REG(data->fan_div[0]));
lm78_write_value(client, LM78_REG_FAN_MIN(1),
data->fan_min[0]);
lm78_write_value(client, LM78_REG_VID_FANDIV, old);
}
}