hwmon: (asc7621) Bug fixes
* Allow fan minimum RPM to be set to zero without triggering alarms. * Fix voltage scaling arithmetic and correct scale factors. * Correct fan1-fan4 alarm bit shifts. * Correct register address for temp3_smoothing_enable. * Read the alarm registers with high priority. Signed-off-by: Ken Milmore <ken.milmore@googlemail.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>hifive-unleashed-5.1
Ken Milmore
Jean Delvare
parent
94b849aaf6
commit
d1bf8cf6b9
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@ -268,8 +268,11 @@ static ssize_t store_fan16(struct device *dev,
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if (strict_strtol(buf, 10, &reqval))
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return -EINVAL;
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/* If a minimum RPM of zero is requested, then we set the register to
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0xffff. This value allows the fan to be stopped completely without
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generating an alarm. */
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reqval =
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(SENSORS_LIMIT((reqval) <= 0 ? 0 : 5400000 / (reqval), 0, 65534));
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(reqval <= 0 ? 0xffff : SENSORS_LIMIT(5400000 / reqval, 0, 0xfffe));
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mutex_lock(&data->update_lock);
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data->reg[param->msb[0]] = (reqval >> 8) & 0xff;
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@ -285,8 +288,9 @@ static ssize_t store_fan16(struct device *dev,
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* Voltages are scaled in the device so that the nominal voltage
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* is 3/4ths of the 0-255 range (i.e. 192).
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* If all voltages are 'normal' then all voltage registers will
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* read 0xC0. This doesn't help us if we don't have a point of refernce.
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* The data sheet however provides us with the full scale value for each
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* read 0xC0.
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*
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* The data sheet provides us with the 3/4 scale value for each voltage
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* which is stored in in_scaling. The sda->index parameter value provides
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* the index into in_scaling.
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*
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@ -295,7 +299,7 @@ static ssize_t store_fan16(struct device *dev,
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*/
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static int asc7621_in_scaling[] = {
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3320, 3000, 4380, 6640, 16000
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2500, 2250, 3300, 5000, 12000
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};
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static ssize_t show_in10(struct device *dev, struct device_attribute *attr,
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@ -306,19 +310,12 @@ static ssize_t show_in10(struct device *dev, struct device_attribute *attr,
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u8 nr = sda->index;
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mutex_lock(&data->update_lock);
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regval = (data->reg[param->msb[0]] * asc7621_in_scaling[nr]) / 256;
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/* The LSB value is a 2-bit scaling of the MSB's LSbit value.
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* I.E. If the maximim voltage for this input is 6640 millivolts then
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* a MSB register value of 0 = 0mv and 255 = 6640mv.
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* A 1 step change therefore represents 25.9mv (6640 / 256).
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* The extra 2-bits therefore represent increments of 6.48mv.
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*/
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regval += ((asc7621_in_scaling[nr] / 256) / 4) *
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(data->reg[param->lsb[0]] >> 6);
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regval = (data->reg[param->msb[0]] << 8) | (data->reg[param->lsb[0]]);
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mutex_unlock(&data->update_lock);
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/* The LSB value is a 2-bit scaling of the MSB's LSbit value. */
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regval = (regval >> 6) * asc7621_in_scaling[nr] / (0xc0 << 2);
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return sprintf(buf, "%u\n", regval);
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}
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@ -331,7 +328,7 @@ static ssize_t show_in8(struct device *dev, struct device_attribute *attr,
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return sprintf(buf, "%u\n",
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((data->reg[param->msb[0]] *
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asc7621_in_scaling[nr]) / 256));
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asc7621_in_scaling[nr]) / 0xc0));
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}
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static ssize_t store_in8(struct device *dev, struct device_attribute *attr,
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@ -344,9 +341,11 @@ static ssize_t store_in8(struct device *dev, struct device_attribute *attr,
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if (strict_strtol(buf, 10, &reqval))
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return -EINVAL;
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reqval = SENSORS_LIMIT(reqval, 0, asc7621_in_scaling[nr]);
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reqval = SENSORS_LIMIT(reqval, 0, 0xffff);
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reqval = (reqval * 255 + 128) / asc7621_in_scaling[nr];
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reqval = reqval * 0xc0 / asc7621_in_scaling[nr];
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reqval = SENSORS_LIMIT(reqval, 0, 0xff);
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mutex_lock(&data->update_lock);
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data->reg[param->msb[0]] = reqval;
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@ -846,11 +845,11 @@ static struct asc7621_param asc7621_params[] = {
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PWRITE(in3_max, 3, PRI_LOW, 0x4b, 0, 0, 0, in8),
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PWRITE(in4_max, 4, PRI_LOW, 0x4d, 0, 0, 0, in8),
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PREAD(in0_alarm, 0, PRI_LOW, 0x41, 0, 0x01, 0, bitmask),
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PREAD(in1_alarm, 1, PRI_LOW, 0x41, 0, 0x01, 1, bitmask),
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PREAD(in2_alarm, 2, PRI_LOW, 0x41, 0, 0x01, 2, bitmask),
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PREAD(in3_alarm, 3, PRI_LOW, 0x41, 0, 0x01, 3, bitmask),
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PREAD(in4_alarm, 4, PRI_LOW, 0x42, 0, 0x01, 0, bitmask),
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PREAD(in0_alarm, 0, PRI_HIGH, 0x41, 0, 0x01, 0, bitmask),
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PREAD(in1_alarm, 1, PRI_HIGH, 0x41, 0, 0x01, 1, bitmask),
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PREAD(in2_alarm, 2, PRI_HIGH, 0x41, 0, 0x01, 2, bitmask),
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PREAD(in3_alarm, 3, PRI_HIGH, 0x41, 0, 0x01, 3, bitmask),
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PREAD(in4_alarm, 4, PRI_HIGH, 0x42, 0, 0x01, 0, bitmask),
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PREAD(fan1_input, 0, PRI_HIGH, 0x29, 0x28, 0, 0, fan16),
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PREAD(fan2_input, 1, PRI_HIGH, 0x2b, 0x2a, 0, 0, fan16),
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@ -862,10 +861,10 @@ static struct asc7621_param asc7621_params[] = {
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PWRITE(fan3_min, 2, PRI_LOW, 0x59, 0x58, 0, 0, fan16),
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PWRITE(fan4_min, 3, PRI_LOW, 0x5b, 0x5a, 0, 0, fan16),
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PREAD(fan1_alarm, 0, PRI_LOW, 0x42, 0, 0x01, 0, bitmask),
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PREAD(fan2_alarm, 1, PRI_LOW, 0x42, 0, 0x01, 1, bitmask),
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PREAD(fan3_alarm, 2, PRI_LOW, 0x42, 0, 0x01, 2, bitmask),
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PREAD(fan4_alarm, 3, PRI_LOW, 0x42, 0, 0x01, 3, bitmask),
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PREAD(fan1_alarm, 0, PRI_HIGH, 0x42, 0, 0x01, 2, bitmask),
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PREAD(fan2_alarm, 1, PRI_HIGH, 0x42, 0, 0x01, 3, bitmask),
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PREAD(fan3_alarm, 2, PRI_HIGH, 0x42, 0, 0x01, 4, bitmask),
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PREAD(fan4_alarm, 3, PRI_HIGH, 0x42, 0, 0x01, 5, bitmask),
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PREAD(temp1_input, 0, PRI_HIGH, 0x25, 0x10, 0, 0, temp10),
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PREAD(temp2_input, 1, PRI_HIGH, 0x26, 0x15, 0, 0, temp10),
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@ -886,10 +885,10 @@ static struct asc7621_param asc7621_params[] = {
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PWRITE(temp3_max, 2, PRI_LOW, 0x53, 0, 0, 0, temp8),
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PWRITE(temp4_max, 3, PRI_LOW, 0x35, 0, 0, 0, temp8),
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PREAD(temp1_alarm, 0, PRI_LOW, 0x41, 0, 0x01, 4, bitmask),
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PREAD(temp2_alarm, 1, PRI_LOW, 0x41, 0, 0x01, 5, bitmask),
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PREAD(temp3_alarm, 2, PRI_LOW, 0x41, 0, 0x01, 6, bitmask),
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PREAD(temp4_alarm, 3, PRI_LOW, 0x43, 0, 0x01, 0, bitmask),
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PREAD(temp1_alarm, 0, PRI_HIGH, 0x41, 0, 0x01, 4, bitmask),
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PREAD(temp2_alarm, 1, PRI_HIGH, 0x41, 0, 0x01, 5, bitmask),
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PREAD(temp3_alarm, 2, PRI_HIGH, 0x41, 0, 0x01, 6, bitmask),
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PREAD(temp4_alarm, 3, PRI_HIGH, 0x43, 0, 0x01, 0, bitmask),
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PWRITE(temp1_source, 0, PRI_LOW, 0x02, 0, 0x07, 4, bitmask),
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PWRITE(temp2_source, 1, PRI_LOW, 0x02, 0, 0x07, 0, bitmask),
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@ -898,7 +897,7 @@ static struct asc7621_param asc7621_params[] = {
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PWRITE(temp1_smoothing_enable, 0, PRI_LOW, 0x62, 0, 0x01, 3, bitmask),
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PWRITE(temp2_smoothing_enable, 1, PRI_LOW, 0x63, 0, 0x01, 7, bitmask),
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PWRITE(temp3_smoothing_enable, 2, PRI_LOW, 0x64, 0, 0x01, 3, bitmask),
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PWRITE(temp3_smoothing_enable, 2, PRI_LOW, 0x63, 0, 0x01, 3, bitmask),
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PWRITE(temp4_smoothing_enable, 3, PRI_LOW, 0x3c, 0, 0x01, 3, bitmask),
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PWRITE(temp1_smoothing_time, 0, PRI_LOW, 0x62, 0, 0x07, 0, temp_st),
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