hwmon: (adt7475) Rework voltage inputs handling
Rework the handling of voltage inputs to make it possible and easy to support more inputs. This will be needed for the upcoming ADT7490 support. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Hans de Goede <hdegoede@redhat.com> Cc: Jordan Crouse <jordan@cosmicpenguin.net> Cc: "Darrick J. Wong" <djwong@us.ibm.com>hifive-unleashed-5.1
Jean Delvare
parent
f99318b254
commit
cffb9dd07f
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@ -39,7 +39,7 @@
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/* 7475 Common Registers */
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#define REG_VOLTAGE_BASE 0x21
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#define REG_VOLTAGE_BASE 0x20
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#define REG_TEMP_BASE 0x25
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#define REG_TACH_BASE 0x28
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#define REG_PWM_BASE 0x30
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@ -51,8 +51,8 @@
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#define REG_STATUS1 0x41
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#define REG_STATUS2 0x42
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#define REG_VOLTAGE_MIN_BASE 0x46
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#define REG_VOLTAGE_MAX_BASE 0x47
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#define REG_VOLTAGE_MIN_BASE 0x44
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#define REG_VOLTAGE_MAX_BASE 0x45
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#define REG_TEMP_MIN_BASE 0x4E
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#define REG_TEMP_MAX_BASE 0x4F
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@ -85,7 +85,7 @@
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/* ADT7475 Settings */
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#define ADT7475_VOLTAGE_COUNT 2
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#define ADT7475_VOLTAGE_COUNT 5 /* Not counting Vtt */
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#define ADT7475_TEMP_COUNT 3
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#define ADT7475_TACH_COUNT 4
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#define ADT7475_PWM_COUNT 3
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@ -137,8 +137,9 @@ struct adt7475_data {
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u8 config4;
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u8 config5;
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u8 has_voltage;
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u16 alarms;
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u16 voltage[3][3];
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u16 voltage[3][6];
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u16 temp[7][3];
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u16 tach[2][4];
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u8 pwm[4][3];
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@ -201,26 +202,30 @@ static inline u16 rpm2tach(unsigned long rpm)
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return SENSORS_LIMIT((90000 * 60) / rpm, 1, 0xFFFF);
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}
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static inline int reg2vcc(u16 reg)
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/* Scaling factors for voltage inputs, taken from the ADT7490 datasheet */
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static const int adt7473_in_scaling[ADT7475_VOLTAGE_COUNT + 1][2] = {
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{ 45, 94 }, /* +2.5V */
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{ 175, 525 }, /* Vccp */
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{ 68, 71 }, /* Vcc */
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{ 93, 47 }, /* +5V */
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{ 120, 20 }, /* +12V */
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{ 45, 45 }, /* Vtt */
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};
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static inline int reg2volt(int channel, u16 reg)
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{
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return (4296 * reg) / 1000;
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const int *r = adt7473_in_scaling[channel];
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return DIV_ROUND_CLOSEST(reg * (r[0] + r[1]) * 2250, r[1] * 1024);
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}
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static inline int reg2vccp(u16 reg)
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static inline u16 volt2reg(int channel, long volt)
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{
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return (2929 * reg) / 1000;
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}
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const int *r = adt7473_in_scaling[channel];
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long reg;
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static inline u16 vcc2reg(long vcc)
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{
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vcc = SENSORS_LIMIT(vcc, 0, 4396);
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return (vcc * 1000) / 4296;
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}
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static inline u16 vccp2reg(long vcc)
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{
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vcc = SENSORS_LIMIT(vcc, 0, 2998);
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return (vcc * 1000) / 2929;
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reg = (volt * r[1] * 1024) / ((r[0] + r[1]) * 2250);
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return SENSORS_LIMIT(reg, 0, 1023) & (0xff << 2);
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}
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static u16 adt7475_read_word(struct i2c_client *client, int reg)
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@ -276,12 +281,10 @@ static ssize_t show_voltage(struct device *dev, struct device_attribute *attr,
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switch (sattr->nr) {
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case ALARM:
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return sprintf(buf, "%d\n",
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(data->alarms >> (sattr->index + 1)) & 1);
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(data->alarms >> sattr->index) & 1);
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default:
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val = data->voltage[sattr->nr][sattr->index];
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return sprintf(buf, "%d\n",
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sattr->index ==
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0 ? reg2vccp(val) : reg2vcc(val));
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return sprintf(buf, "%d\n", reg2volt(sattr->index, val));
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}
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}
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@ -300,8 +303,7 @@ static ssize_t set_voltage(struct device *dev, struct device_attribute *attr,
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mutex_lock(&data->lock);
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data->voltage[sattr->nr][sattr->index] =
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sattr->index ? vcc2reg(val) : vccp2reg(val);
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data->voltage[sattr->nr][sattr->index] = volt2reg(sattr->index, val);
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if (sattr->nr == MIN)
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reg = VOLTAGE_MIN_REG(sattr->index);
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@ -815,18 +817,18 @@ static ssize_t set_pwm_at_crit(struct device *dev,
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return count;
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}
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static SENSOR_DEVICE_ATTR_2(in1_input, S_IRUGO, show_voltage, NULL, INPUT, 0);
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static SENSOR_DEVICE_ATTR_2(in1_input, S_IRUGO, show_voltage, NULL, INPUT, 1);
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static SENSOR_DEVICE_ATTR_2(in1_max, S_IRUGO | S_IWUSR, show_voltage,
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set_voltage, MAX, 0);
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static SENSOR_DEVICE_ATTR_2(in1_min, S_IRUGO | S_IWUSR, show_voltage,
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set_voltage, MIN, 0);
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static SENSOR_DEVICE_ATTR_2(in1_alarm, S_IRUGO, show_voltage, NULL, ALARM, 0);
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static SENSOR_DEVICE_ATTR_2(in2_input, S_IRUGO, show_voltage, NULL, INPUT, 1);
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static SENSOR_DEVICE_ATTR_2(in2_max, S_IRUGO | S_IWUSR, show_voltage,
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set_voltage, MAX, 1);
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static SENSOR_DEVICE_ATTR_2(in2_min, S_IRUGO | S_IWUSR, show_voltage,
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static SENSOR_DEVICE_ATTR_2(in1_min, S_IRUGO | S_IWUSR, show_voltage,
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set_voltage, MIN, 1);
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static SENSOR_DEVICE_ATTR_2(in2_alarm, S_IRUGO, show_voltage, NULL, ALARM, 1);
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static SENSOR_DEVICE_ATTR_2(in1_alarm, S_IRUGO, show_voltage, NULL, ALARM, 1);
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static SENSOR_DEVICE_ATTR_2(in2_input, S_IRUGO, show_voltage, NULL, INPUT, 2);
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static SENSOR_DEVICE_ATTR_2(in2_max, S_IRUGO | S_IWUSR, show_voltage,
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set_voltage, MAX, 2);
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static SENSOR_DEVICE_ATTR_2(in2_min, S_IRUGO | S_IWUSR, show_voltage,
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set_voltage, MIN, 2);
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static SENSOR_DEVICE_ATTR_2(in2_alarm, S_IRUGO, show_voltage, NULL, ALARM, 2);
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static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, INPUT, 0);
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static SENSOR_DEVICE_ATTR_2(temp1_alarm, S_IRUGO, show_temp, NULL, ALARM, 0);
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static SENSOR_DEVICE_ATTR_2(temp1_fault, S_IRUGO, show_temp, NULL, FAULT, 0);
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@ -1050,6 +1052,12 @@ static int adt7475_probe(struct i2c_client *client,
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mutex_init(&data->lock);
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i2c_set_clientdata(client, data);
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/* Initialize device-specific values */
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switch (id->driver_data) {
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default:
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data->has_voltage = 0x06; /* in1, in2 */
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}
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/* Call adt7475_read_pwm for all pwm's as this will reprogram any
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pwm's which are disabled to manual mode with 0% duty cycle */
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for (i = 0; i < ADT7475_PWM_COUNT; i++)
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@ -1176,10 +1184,13 @@ static struct adt7475_data *adt7475_update_device(struct device *dev)
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data->alarms |= adt7475_read(REG_STATUS1);
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ext = adt7475_read(REG_EXTEND1);
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for (i = 0; i < ADT7475_VOLTAGE_COUNT; i++)
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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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data->voltage[INPUT][i] =
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(adt7475_read(VOLTAGE_REG(i)) << 2) |
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((ext >> ((i + 1) * 2)) & 3);
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((ext >> (i * 2)) & 3);
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}
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ext = adt7475_read(REG_EXTEND2);
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for (i = 0; i < ADT7475_TEMP_COUNT; i++)
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@ -1205,6 +1216,8 @@ static struct adt7475_data *adt7475_update_device(struct device *dev)
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data->config5 = adt7475_read(REG_CONFIG5);
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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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