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hwmon: (pmbus) Improve auto-detection of temperature status register 

It is possible that a PMBus device supports the READ_TEMPERATURE2 and/or
READ_TEMPERATURE3 registers but does not support READ_TEMPERATURE1.
Improve temperature status register detection to address this condition.

Reported-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Acked-by: Jean Delvare <khali@linux-fr.org>
Cc: stable@kernel.org # 2.6.39+
This commit is contained in:
Guenter Roeck 2011-07-03 13:08:03 -07:00
Родитель 0c2a40e2fe
Коммит 22e6b2312d
1 изменённых файлов: 6 добавлений и 5 удалений
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11
drivers/hwmon/pmbus.c
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@ -59,16 +59,17 @@ static void pmbus_find_sensor_groups(struct i2c_client *client,
if (pmbus_check_byte_register(client, 0, PMBUS_STATUS_FAN_34)) if (pmbus_check_byte_register(client, 0, PMBUS_STATUS_FAN_34))
info->func[0] |= PMBUS_HAVE_STATUS_FAN34; info->func[0] |= PMBUS_HAVE_STATUS_FAN34;
} }
if (pmbus_check_word_register(client, 0, PMBUS_READ_TEMPERATURE_1)) { if (pmbus_check_word_register(client, 0, PMBUS_READ_TEMPERATURE_1))
info->func[0] |= PMBUS_HAVE_TEMP; info->func[0] |= PMBUS_HAVE_TEMP;
if (pmbus_check_byte_register(client, 0,
PMBUS_STATUS_TEMPERATURE))
info->func[0] |= PMBUS_HAVE_STATUS_TEMP;
}
if (pmbus_check_word_register(client, 0, PMBUS_READ_TEMPERATURE_2)) if (pmbus_check_word_register(client, 0, PMBUS_READ_TEMPERATURE_2))
info->func[0] |= PMBUS_HAVE_TEMP2; info->func[0] |= PMBUS_HAVE_TEMP2;
if (pmbus_check_word_register(client, 0, PMBUS_READ_TEMPERATURE_3)) if (pmbus_check_word_register(client, 0, PMBUS_READ_TEMPERATURE_3))
info->func[0] |= PMBUS_HAVE_TEMP3; info->func[0] |= PMBUS_HAVE_TEMP3;
if (info->func[0] & (PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2
| PMBUS_HAVE_TEMP3)
&& pmbus_check_byte_register(client, 0,
PMBUS_STATUS_TEMPERATURE))
info->func[0] |= PMBUS_HAVE_STATUS_TEMP;
/* Sensors detected on all pages */ /* Sensors detected on all pages */
for (page = 0; page < info->pages; page++) { for (page = 0; page < info->pages; page++) {