diff options
| author | Guenter Roeck <guenter.roeck@ericsson.com> | 2011-07-03 22:08:03 +0200 |
|---|---|---|
| committer | Guenter Roeck <guenter.roeck@ericsson.com> | 2011-07-10 17:54:29 +0200 |
| commit | 22e6b2312d221376dcd98a8afb0f314b62d33a91 (patch) | |
| tree | 73906c8f5f2a381fe085d3660ef333e99c871926 | |
| parent | hwmon: (lm95241) Fix negative temperature results (diff) | |
| download | linux-22e6b2312d221376dcd98a8afb0f314b62d33a91.tar.xz linux-22e6b2312d221376dcd98a8afb0f314b62d33a91.zip | |
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+
| -rw-r--r-- | drivers/hwmon/pmbus.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/drivers/hwmon/pmbus.c b/drivers/hwmon/pmbus.c index 931d940923ae..9b1f0c37ef77 100644 --- a/drivers/hwmon/pmbus.c +++ b/drivers/hwmon/pmbus.c @@ -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)) 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; - 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)) info->func[0] |= PMBUS_HAVE_TEMP2; if (pmbus_check_word_register(client, 0, PMBUS_READ_TEMPERATURE_3)) 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 */ for (page = 0; page < info->pages; page++) { |