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authorJean Delvare <khali@linux-fr.org>2006-08-28 14:37:54 +0200
committerGreg Kroah-Hartman <gregkh@suse.de>2006-09-28 15:31:13 -0700
commitc5df9b7a7c7600e4365e81f64ea44beb5be8bfa7 (patch)
tree8a896e389021b6a8d5870336d3781e025a4d37b2 /drivers/hwmon
parent87673dd735b8e089b7f2830edd353aa5f5e743ad (diff)
it87: Overwrite broken default limits
it87: Overwrite broken default limits Some IT8716F chips where seen with unreasonable defaults for low voltage and high temperature limits. Overwrite them with sane defaults so as to not generate meaningless alarms. Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/hwmon')
-rw-r--r--drivers/hwmon/it87.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/hwmon/it87.c b/drivers/hwmon/it87.c
index 956cd553c71..de62f60bcaf 100644
--- a/drivers/hwmon/it87.c
+++ b/drivers/hwmon/it87.c
@@ -1202,6 +1202,22 @@ static void it87_init_client(struct i2c_client *client, struct it87_data *data)
data->manual_pwm_ctl[i] = 0xff;
}
+ /* Some chips seem to have default value 0xff for all limit
+ * registers. For low voltage limits it makes no sense and triggers
+ * alarms, so change to 0 instead. For high temperature limits, it
+ * means -1 degree C, which surprisingly doesn't trigger an alarm,
+ * but is still confusing, so change to 127 degrees C. */
+ for (i = 0; i < 8; i++) {
+ tmp = it87_read_value(client, IT87_REG_VIN_MIN(i));
+ if (tmp == 0xff)
+ it87_write_value(client, IT87_REG_VIN_MIN(i), 0);
+ }
+ for (i = 0; i < 3; i++) {
+ tmp = it87_read_value(client, IT87_REG_TEMP_HIGH(i));
+ if (tmp == 0xff)
+ it87_write_value(client, IT87_REG_TEMP_HIGH(i), 127);
+ }
+
/* Check if temperature channnels are reset manually or by some reason */
tmp = it87_read_value(client, IT87_REG_TEMP_ENABLE);
if ((tmp & 0x3f) == 0) {