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hwmon: (w83627ehf) Permit enabling SmartFan IV mode if configured at startup

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If SmartFan IV mode was configured at startup, it should be possible
to re-enable it later on.

Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Acked-by: Ian Dobson <i.dobson@planet-ian.com>
This commit is contained in:
Guenter Roeck 2011-02-13 23:01:25 -08:00
parent 279af1a91a
commit b84bb51862
1 changed files with 10 additions and 2 deletions
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12
drivers/hwmon/w83627ehf.c
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@ -346,7 +346,10 @@ struct w83627ehf_data {
2->thermal cruise mode (also called SmartFan I)
3->fan speed cruise mode
4->variable thermal cruise (also called
SmartFan III) */
SmartFan III)
5->enhanced variable thermal cruise (also called
SmartFan IV) */
u8 pwm_enable_orig[4]; /* original value of pwm_enable */
u8 pwm_num; /* number of pwm */
u8 pwm[4];
u8 target_temp[4];
@ -1055,7 +1058,7 @@ store_pwm_enable(struct device *dev, struct device_attribute *attr,
if (err < 0)
return err;
if (!val || (val > 4))
if (!val || (val > 4 && val != data->pwm_enable_orig[nr]))
return -EINVAL;
mutex_lock(&data->update_lock);
reg = w83627ehf_read_value(data, W83627EHF_REG_PWM_ENABLE[nr]);
@ -1617,6 +1620,11 @@ static int __devinit w83627ehf_probe(struct platform_device *pdev)
/* Read fan clock dividers immediately */
w83627ehf_update_fan_div(data);
/* Read pwm data to save original values */
w83627ehf_update_pwm_common(dev, data);
for (i = 0; i < data->pwm_num; i++)
data->pwm_enable_orig[i] = data->pwm_enable[i];
/* Register sysfs hooks */
for (i = 0; i < ARRAY_SIZE(sda_sf3_arrays); i++) {
err = device_create_file(dev, &sda_sf3_arrays[i].dev_attr);