hwmon: (adt7475) Change update functions to add error handling
I2C SMBus sometimes returns error codes. In the error case, measurement values are updated incorrectly. The sensor application then generates warning log messages and SNMP traps. To prevent this, add error handling into the update functions. Signed-off-by: Tokunori Ikegami <ikegami@allied-telesis.co.jp> Cc: Guenter Roeck <linux@roeck-us.net> Cc: Chris Packham <chris.packham@alliedtelesis.co.nz> [groeck: Update description] Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Tokunori Ikegami
Guenter Roeck
Родитель
b36fb17159
Коммит
702afead45
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@ -1384,63 +1384,119 @@ static void adt7475_remove_files(struct i2c_client *client,
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sysfs_remove_group(&client->dev.kobj, &vid_attr_group);
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}
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static void adt7475_update_limits(struct i2c_client *client)
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static int adt7475_update_limits(struct i2c_client *client)
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{
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struct adt7475_data *data = i2c_get_clientdata(client);
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int i;
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int ret;
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data->config4 = adt7475_read(REG_CONFIG4);
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data->config5 = adt7475_read(REG_CONFIG5);
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ret = adt7475_read(REG_CONFIG4);
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if (ret < 0)
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return ret;
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data->config4 = ret;
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ret = adt7475_read(REG_CONFIG5);
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if (ret < 0)
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return ret;
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data->config5 = ret;
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for (i = 0; i < ADT7475_VOLTAGE_COUNT; i++) {
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if (!(data->has_voltage & (1 << i)))
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continue;
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/* Adjust values so they match the input precision */
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data->voltage[MIN][i] =
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adt7475_read(VOLTAGE_MIN_REG(i)) << 2;
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data->voltage[MAX][i] =
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adt7475_read(VOLTAGE_MAX_REG(i)) << 2;
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ret = adt7475_read(VOLTAGE_MIN_REG(i));
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if (ret < 0)
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return ret;
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data->voltage[MIN][i] = ret << 2;
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ret = adt7475_read(VOLTAGE_MAX_REG(i));
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if (ret < 0)
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return ret;
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data->voltage[MAX][i] = ret << 2;
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}
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if (data->has_voltage & (1 << 5)) {
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data->voltage[MIN][5] = adt7475_read(REG_VTT_MIN) << 2;
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data->voltage[MAX][5] = adt7475_read(REG_VTT_MAX) << 2;
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ret = adt7475_read(REG_VTT_MIN);
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if (ret < 0)
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return ret;
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data->voltage[MIN][5] = ret << 2;
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ret = adt7475_read(REG_VTT_MAX);
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if (ret < 0)
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return ret;
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data->voltage[MAX][5] = ret << 2;
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}
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for (i = 0; i < ADT7475_TEMP_COUNT; i++) {
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/* Adjust values so they match the input precision */
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data->temp[MIN][i] =
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adt7475_read(TEMP_MIN_REG(i)) << 2;
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data->temp[MAX][i] =
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adt7475_read(TEMP_MAX_REG(i)) << 2;
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data->temp[AUTOMIN][i] =
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adt7475_read(TEMP_TMIN_REG(i)) << 2;
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data->temp[THERM][i] =
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adt7475_read(TEMP_THERM_REG(i)) << 2;
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data->temp[OFFSET][i] =
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adt7475_read(TEMP_OFFSET_REG(i));
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ret = adt7475_read(TEMP_MIN_REG(i));
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if (ret < 0)
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return ret;
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data->temp[MIN][i] = ret << 2;
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ret = adt7475_read(TEMP_MAX_REG(i));
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if (ret < 0)
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return ret;
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data->temp[MAX][i] = ret << 2;
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ret = adt7475_read(TEMP_TMIN_REG(i));
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if (ret < 0)
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return ret;
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data->temp[AUTOMIN][i] = ret << 2;
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ret = adt7475_read(TEMP_THERM_REG(i));
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if (ret < 0)
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return ret;
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data->temp[THERM][i] = ret << 2;
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ret = adt7475_read(TEMP_OFFSET_REG(i));
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if (ret < 0)
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return ret;
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data->temp[OFFSET][i] = ret;
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}
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adt7475_read_hystersis(client);
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for (i = 0; i < ADT7475_TACH_COUNT; i++) {
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if (i == 3 && !data->has_fan4)
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continue;
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data->tach[MIN][i] =
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adt7475_read_word(client, TACH_MIN_REG(i));
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ret = adt7475_read_word(client, TACH_MIN_REG(i));
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if (ret < 0)
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return ret;
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data->tach[MIN][i] = ret;
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}
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for (i = 0; i < ADT7475_PWM_COUNT; i++) {
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if (i == 1 && !data->has_pwm2)
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continue;
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data->pwm[MAX][i] = adt7475_read(PWM_MAX_REG(i));
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data->pwm[MIN][i] = adt7475_read(PWM_MIN_REG(i));
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ret = adt7475_read(PWM_MAX_REG(i));
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if (ret < 0)
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return ret;
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data->pwm[MAX][i] = ret;
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ret = adt7475_read(PWM_MIN_REG(i));
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if (ret < 0)
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return ret;
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data->pwm[MIN][i] = ret;
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/* Set the channel and control information */
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adt7475_read_pwm(client, i);
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}
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data->range[0] = adt7475_read(TEMP_TRANGE_REG(0));
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data->range[1] = adt7475_read(TEMP_TRANGE_REG(1));
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data->range[2] = adt7475_read(TEMP_TRANGE_REG(2));
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ret = adt7475_read(TEMP_TRANGE_REG(0));
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if (ret < 0)
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return ret;
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data->range[0] = ret;
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ret = adt7475_read(TEMP_TRANGE_REG(1));
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if (ret < 0)
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return ret;
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data->range[1] = ret;
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ret = adt7475_read(TEMP_TRANGE_REG(2));
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if (ret < 0)
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return ret;
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data->range[2] = ret;
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return 0;
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}
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static int adt7475_probe(struct i2c_client *client,
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@ -1719,54 +1775,101 @@ static void adt7475_read_pwm(struct i2c_client *client, int index)
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}
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}
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static void adt7475_update_measure(struct device *dev)
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static int adt7475_update_measure(struct device *dev)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct adt7475_data *data = i2c_get_clientdata(client);
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u16 ext;
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int i;
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int ret;
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data->alarms = adt7475_read(REG_STATUS2) << 8;
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data->alarms |= adt7475_read(REG_STATUS1);
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ret = adt7475_read(REG_STATUS2);
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if (ret < 0)
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return ret;
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data->alarms = ret << 8;
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ret = adt7475_read(REG_STATUS1);
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if (ret < 0)
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return ret;
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data->alarms |= ret;
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ret = adt7475_read(REG_EXTEND2);
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if (ret < 0)
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return ret;
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ext = (ret << 8);
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ret = adt7475_read(REG_EXTEND1);
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if (ret < 0)
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return ret;
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ext |= ret;
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ext = (adt7475_read(REG_EXTEND2) << 8) |
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adt7475_read(REG_EXTEND1);
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for (i = 0; i < ADT7475_VOLTAGE_COUNT; i++) {
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if (!(data->has_voltage & (1 << i)))
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continue;
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ret = adt7475_read(VOLTAGE_REG(i));
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if (ret < 0)
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return ret;
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data->voltage[INPUT][i] =
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(adt7475_read(VOLTAGE_REG(i)) << 2) |
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(ret << 2) |
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((ext >> (i * 2)) & 3);
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}
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for (i = 0; i < ADT7475_TEMP_COUNT; i++)
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for (i = 0; i < ADT7475_TEMP_COUNT; i++) {
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ret = adt7475_read(TEMP_REG(i));
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if (ret < 0)
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return ret;
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data->temp[INPUT][i] =
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(adt7475_read(TEMP_REG(i)) << 2) |
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(ret << 2) |
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((ext >> ((i + 5) * 2)) & 3);
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}
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if (data->has_voltage & (1 << 5)) {
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data->alarms |= adt7475_read(REG_STATUS4) << 24;
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ext = adt7475_read(REG_EXTEND3);
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data->voltage[INPUT][5] = adt7475_read(REG_VTT) << 2 |
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ret = adt7475_read(REG_STATUS4);
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if (ret < 0)
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return ret;
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data->alarms |= ret << 24;
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ret = adt7475_read(REG_EXTEND3);
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if (ret < 0)
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return ret;
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ext = ret;
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ret = adt7475_read(REG_VTT);
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if (ret < 0)
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return ret;
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data->voltage[INPUT][5] = ret << 2 |
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((ext >> 4) & 3);
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}
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for (i = 0; i < ADT7475_TACH_COUNT; i++) {
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if (i == 3 && !data->has_fan4)
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continue;
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data->tach[INPUT][i] =
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adt7475_read_word(client, TACH_REG(i));
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ret = adt7475_read_word(client, TACH_REG(i));
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if (ret < 0)
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return ret;
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data->tach[INPUT][i] = ret;
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}
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/* Updated by hw when in auto mode */
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for (i = 0; i < ADT7475_PWM_COUNT; i++) {
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if (i == 1 && !data->has_pwm2)
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continue;
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data->pwm[INPUT][i] = adt7475_read(PWM_REG(i));
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ret = adt7475_read(PWM_REG(i));
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if (ret < 0)
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return ret;
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data->pwm[INPUT][i] = ret;
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}
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if (data->has_vid)
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data->vid = adt7475_read(REG_VID) & 0x3f;
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if (data->has_vid) {
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ret = adt7475_read(REG_VID);
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if (ret < 0)
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return ret;
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data->vid = ret & 0x3f;
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}
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return 0;
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}
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static struct adt7475_data *adt7475_update_device(struct device *dev)
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