From: Jean Delvare Date: Mon, 28 Aug 2006 12:37:54 +0000 (+0200) Subject: it87: Overwrite broken default limits X-Git-Tag: v2.6.19-rc1~860^2~27 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c5df9b7a7c7600e4365e81f64ea44beb5be8bfa7;p=linux-2.6 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 Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/hwmon/it87.c b/drivers/hwmon/it87.c index 956cd553c7..de62f60bca 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) {