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Rework auto fan clock divider algorithm.

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git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@2563 7894878c-1315-0410-8ee3-d5d059ff63e0
This commit is contained in:
Jean Delvare committed 2004-05-24 18:40:07 +00:00
1 parent 488b99274d
commit ed4dfa0cbd
1 file changed
+14 -11
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kernel/chips/pc87360.c
+14 -11
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@@ -853,6 +853,8 @@ static void pc87360_init_client(struct i2c_client *client, int use_thermistors)
static void pc87360_autodiv(struct pc87360_data *data, int nr)
{
u8 old_min = data->fan_min[nr];
/* Increase clock divider if needed and possible */
if ((data->fan_status[nr] & 0x04) /* overflow flag */
|| (data->fan[nr] >= 224)) { /* next to overflow */
@@ -860,9 +862,6 @@ static void pc87360_autodiv(struct pc87360_data *data, int nr)
data->fan_status[nr] += 0x20;
data->fan_min[nr] >>= 1;
data->fan[nr] >>= 1;
pc87360_write_value(data, LD_FAN, NO_BANK,
PC87360_REG_FAN_MIN(nr),
data->fan_min[nr]);
#ifdef DEBUG
printk(KERN_DEBUG "pc87360.o: Increasing "
"clock divider to %d for fan %d\n",
@@ -870,17 +869,14 @@ static void pc87360_autodiv(struct pc87360_data *data, int nr)
nr+1);
#endif
}
} else
/* Decrease clock divider if needed and possible */
if (data->fan[nr] < 85 /* bad accuracy */
&& !(data->fan_min[nr] & 0x80)) {
if ((data->fan_status[nr] & 0x60) != 0x00) {
} else {
/* Decrease clock divider if possible */
while (!(data->fan_min[nr] & 0x80) /* fan min "nails" divider */
&& data->fan[nr] < 85 /* bad accuracy */
&& (data->fan_status[nr] & 0x60) != 0x00) {
data->fan_status[nr] -= 0x20;
data->fan_min[nr] <<= 1;
data->fan[nr] <<= 1;
pc87360_write_value(data, LD_FAN, NO_BANK,
PC87360_REG_FAN_MIN(nr),
data->fan_min[nr]);
#ifdef DEBUG
printk(KERN_DEBUG "pc87360.o: Decreasing "
"clock divider to %d for fan %d\n",
@@ -889,6 +885,13 @@ static void pc87360_autodiv(struct pc87360_data *data, int nr)
#endif
}
}
/* Write new fan min if it changed */
if (old_min != data->fan_min[nr]) {
pc87360_write_value(data, LD_FAN, NO_BANK,
PC87360_REG_FAN_MIN(nr),
data->fan_min[nr]);
}
}
static void pc87360_update_client(struct i2c_client *client)