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| author | Jean Delvare <khali@linux-fr.org> | 2011-01-12 21:55:09 +0100 |
|---|---|---|
| committer | Jean Delvare <khali@endymion.delvare> | 2011-01-12 21:55:09 +0100 |
| commit | f790674d3f87df6390828ac21a7d1530f71b59c8 (patch) | |
| tree | 0ecb41ffc87ec234c7dd4e62e9f835bd8265f20f /drivers/hwmon | |
| parent | hwmon: (w83795) Silent false warning from gcc (diff) | |
| download | linux-f790674d3f87df6390828ac21a7d1530f71b59c8.tar.xz linux-f790674d3f87df6390828ac21a7d1530f71b59c8.zip | |
hwmon: (via686a) Initialize fan_div values
Functions set_fan_min() and set_fan_div() assume that the fan_div
values have already been read from the register. The driver currently
doesn't initialize them at load time, they are only set when function
via686a_update_device() is called. This means that set_fan_min() and
set_fan_div() misbehave if, for example, "sensors -s" is called
before any monitoring application (e.g. "sensors") is has been run.
Fix the problem by always initializing the fan_div values at device
bind time.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: stable@kernel.org
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>
Diffstat (limited to 'drivers/hwmon')
| -rw-r--r-- | drivers/hwmon/via686a.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/drivers/hwmon/via686a.c b/drivers/hwmon/via686a.c index 13e8d218e495..25e91665a0a2 100644 --- a/drivers/hwmon/via686a.c +++ b/drivers/hwmon/via686a.c @@ -689,6 +689,13 @@ static int __devexit via686a_remove(struct platform_device *pdev) return 0; } +static void via686a_update_fan_div(struct via686a_data *data) +{ + int reg = via686a_read_value(data, VIA686A_REG_FANDIV); + data->fan_div[0] = (reg >> 4) & 0x03; + data->fan_div[1] = reg >> 6; +} + static void __devinit via686a_init_device(struct via686a_data *data) { u8 reg; @@ -702,6 +709,9 @@ static void __devinit via686a_init_device(struct via686a_data *data) via686a_write_value(data, VIA686A_REG_TEMP_MODE, (reg & ~VIA686A_TEMP_MODE_MASK) | VIA686A_TEMP_MODE_CONTINUOUS); + + /* Pre-read fan clock divisor values */ + via686a_update_fan_div(data); } static struct via686a_data *via686a_update_device(struct device *dev) @@ -753,9 +763,7 @@ static struct via686a_data *via686a_update_device(struct device *dev) (via686a_read_value(data, VIA686A_REG_TEMP_LOW23) & 0xc0) >> 6; - i = via686a_read_value(data, VIA686A_REG_FANDIV); - data->fan_div[0] = (i >> 4) & 0x03; - data->fan_div[1] = i >> 6; + via686a_update_fan_div(data); data->alarms = via686a_read_value(data, VIA686A_REG_ALARM1) | |