Hi Pali, thanks for the patch and sorry for the delay! I've checked out https://git.kernel.org/cgit/linux/kernel/git/groeck/linux-staging.git/commit/?h=hwmon-staging&id=86c050c82dd527b17cf47043831f03646f402a88 and ran it on my Dell M3800. It correctly works for identifying 2 fans, one listed as "Processor Fan" and the other as "Video Fan".
The freeze only causes "Processor Fan" to run at maximum btw., "Video Fan" seems to be untouched. I don't get identical rpm values for both of them, so they are indeed 2 independent fans. E.g. at ~70°C, I get 2300rpm for CPU and 2400rpm for Video. Looks good to me. Cheers, Tolga Cakir 2016-05-31 13:03 GMT+02:00 Pali Rohár <pali.ro...@gmail.com>: > Tolga, can you test this patch if is working for you correctly? > > On Saturday 21 May 2016 16:52:46 Pali Rohár wrote: >> Some Dell machines (e.g. Dell Precision M3800) have two fans, first with >> index=0 and second with index=2. So export also attributes for third fan >> device with index=2. >> >> Reported-by: Tolga Cakir <cevel...@gmail.com> >> Signed-off-by: Pali Rohár <pali.ro...@gmail.com> >> --- >> drivers/hwmon/dell-smm-hwmon.c | 20 +++++++++++++++++++- >> 1 file changed, 19 insertions(+), 1 deletion(-) >> --- >> >> Hi Tolga! Can you test this patch if sensors see fan device correctly? >> >> diff --git a/drivers/hwmon/dell-smm-hwmon.c b/drivers/hwmon/dell-smm-hwmon.c >> index 577445f..7a2764a 100644 >> --- a/drivers/hwmon/dell-smm-hwmon.c >> +++ b/drivers/hwmon/dell-smm-hwmon.c >> @@ -78,6 +78,7 @@ static uint i8k_fan_max = I8K_FAN_HIGH; >> #define I8K_HWMON_HAVE_TEMP4 (1 << 3) >> #define I8K_HWMON_HAVE_FAN1 (1 << 4) >> #define I8K_HWMON_HAVE_FAN2 (1 << 5) >> +#define I8K_HWMON_HAVE_FAN3 (1 << 6) >> >> MODULE_AUTHOR("Massimo Dal Zotto (d...@debian.org)"); >> MODULE_AUTHOR("Pali Rohár <pali.ro...@gmail.com>"); >> @@ -246,7 +247,7 @@ static int _i8k_get_fan_type(int fan) >> static int i8k_get_fan_type(int fan) >> { >> /* I8K_SMM_GET_FAN_TYPE SMM call is expensive, so cache values */ >> - static int types[2] = { INT_MIN, INT_MIN }; >> + static int types[3] = { INT_MIN, INT_MIN, INT_MIN }; >> >> if (types[fan] == INT_MIN) >> types[fan] = _i8k_get_fan_type(fan); >> @@ -707,6 +708,12 @@ static SENSOR_DEVICE_ATTR(fan2_label, S_IRUGO, >> i8k_hwmon_show_fan_label, NULL, >> 1); >> static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, i8k_hwmon_show_pwm, >> i8k_hwmon_set_pwm, 1); >> +static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, i8k_hwmon_show_fan, NULL, >> + 2); >> +static SENSOR_DEVICE_ATTR(fan3_label, S_IRUGO, i8k_hwmon_show_fan_label, >> NULL, >> + 2); >> +static SENSOR_DEVICE_ATTR(pwm3, S_IRUGO | S_IWUSR, i8k_hwmon_show_pwm, >> + i8k_hwmon_set_pwm, 2); >> >> static struct attribute *i8k_attrs[] = { >> &sensor_dev_attr_temp1_input.dev_attr.attr, /* 0 */ >> @@ -723,6 +730,9 @@ static struct attribute *i8k_attrs[] = { >> &sensor_dev_attr_fan2_input.dev_attr.attr, /* 11 */ >> &sensor_dev_attr_fan2_label.dev_attr.attr, /* 12 */ >> &sensor_dev_attr_pwm2.dev_attr.attr, /* 13 */ >> + &sensor_dev_attr_fan3_input.dev_attr.attr, /* 14 */ >> + &sensor_dev_attr_fan3_label.dev_attr.attr, /* 15 */ >> + &sensor_dev_attr_pwm3.dev_attr.attr, /* 16 */ >> NULL >> }; >> >> @@ -747,6 +757,9 @@ static umode_t i8k_is_visible(struct kobject *kobj, >> struct attribute *attr, >> if (index >= 11 && index <= 13 && >> !(i8k_hwmon_flags & I8K_HWMON_HAVE_FAN2)) >> return 0; >> + if (index >= 14 && index <= 16 && >> + !(i8k_hwmon_flags & I8K_HWMON_HAVE_FAN3)) >> + return 0; >> >> return attr->mode; >> } >> @@ -788,6 +801,11 @@ static int __init i8k_init_hwmon(void) >> if (err >= 0) >> i8k_hwmon_flags |= I8K_HWMON_HAVE_FAN2; >> >> + /* Third fan attributes, if fan status is OK */ >> + err = i8k_get_fan_status(2); >> + if (err >= 0) >> + i8k_hwmon_flags |= I8K_HWMON_HAVE_FAN3; >> + >> i8k_hwmon_dev = hwmon_device_register_with_groups(NULL, "dell_smm", >> NULL, i8k_groups); >> if (IS_ERR(i8k_hwmon_dev)) { > > -- > Pali Rohár > pali.ro...@gmail.com