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hwmon: (adt7411) add min, max and alarm attributes
This patch adds support for the min, max and alarm attributes of the voltage and temperature channels. Additionally, the temp2_fault attribute is supported which indicates a fault of the external temperature diode. Signed-off-by: Michael Walle <michael@walle.cc> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Michael Walle
Guenter Roeck
parent
5da99328f2
commit
9bb2d47d74
@ -21,6 +21,21 @@
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#include <linux/hwmon-sysfs.h>
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#include <linux/slab.h>
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#define ADT7411_REG_STAT_1 0x00
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#define ADT7411_STAT_1_INT_TEMP_HIGH BIT(0)
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#define ADT7411_STAT_1_INT_TEMP_LOW BIT(1)
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#define ADT7411_STAT_1_EXT_TEMP_HIGH_AIN1 BIT(2)
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#define ADT7411_STAT_1_EXT_TEMP_LOW BIT(3)
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#define ADT7411_STAT_1_EXT_TEMP_FAULT BIT(4)
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#define ADT7411_STAT_1_AIN2 BIT(5)
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#define ADT7411_STAT_1_AIN3 BIT(6)
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#define ADT7411_STAT_1_AIN4 BIT(7)
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#define ADT7411_REG_STAT_2 0x01
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#define ADT7411_STAT_2_AIN5 BIT(0)
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#define ADT7411_STAT_2_AIN6 BIT(1)
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#define ADT7411_STAT_2_AIN7 BIT(2)
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#define ADT7411_STAT_2_AIN8 BIT(3)
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#define ADT7411_STAT_2_VDD BIT(4)
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#define ADT7411_REG_INT_TEMP_VDD_LSB 0x03
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#define ADT7411_REG_EXT_TEMP_AIN14_LSB 0x04
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#define ADT7411_REG_VDD_MSB 0x06
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@ -28,20 +43,31 @@
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#define ADT7411_REG_EXT_TEMP_AIN1_MSB 0x08
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#define ADT7411_REG_CFG1 0x18
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#define ADT7411_CFG1_START_MONITOR (1 << 0)
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#define ADT7411_CFG1_RESERVED_BIT1 (1 << 1)
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#define ADT7411_CFG1_EXT_TDM (1 << 2)
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#define ADT7411_CFG1_RESERVED_BIT3 (1 << 3)
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#define ADT7411_CFG1_START_MONITOR BIT(0)
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#define ADT7411_CFG1_RESERVED_BIT1 BIT(1)
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#define ADT7411_CFG1_EXT_TDM BIT(2)
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#define ADT7411_CFG1_RESERVED_BIT3 BIT(3)
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#define ADT7411_REG_CFG2 0x19
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#define ADT7411_CFG2_DISABLE_AVG (1 << 5)
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#define ADT7411_CFG2_DISABLE_AVG BIT(5)
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#define ADT7411_REG_CFG3 0x1a
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#define ADT7411_CFG3_ADC_CLK_225 (1 << 0)
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#define ADT7411_CFG3_RESERVED_BIT1 (1 << 1)
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#define ADT7411_CFG3_RESERVED_BIT2 (1 << 2)
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#define ADT7411_CFG3_RESERVED_BIT3 (1 << 3)
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#define ADT7411_CFG3_REF_VDD (1 << 4)
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#define ADT7411_CFG3_ADC_CLK_225 BIT(0)
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#define ADT7411_CFG3_RESERVED_BIT1 BIT(1)
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#define ADT7411_CFG3_RESERVED_BIT2 BIT(2)
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#define ADT7411_CFG3_RESERVED_BIT3 BIT(3)
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#define ADT7411_CFG3_REF_VDD BIT(4)
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#define ADT7411_REG_VDD_HIGH 0x23
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#define ADT7411_REG_VDD_LOW 0x24
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#define ADT7411_REG_TEMP_HIGH(nr) (0x25 + 2 * (nr))
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#define ADT7411_REG_TEMP_LOW(nr) (0x26 + 2 * (nr))
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#define ADT7411_REG_IN_HIGH(nr) ((nr) > 1 \
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? 0x2b + 2 * ((nr)-2) \
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: 0x27)
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#define ADT7411_REG_IN_LOW(nr) ((nr) > 1 \
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? 0x2c + 2 * ((nr)-2) \
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: 0x28)
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#define ADT7411_REG_DEVICE_ID 0x4d
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#define ADT7411_REG_MANUFACTURER_ID 0x4e
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@ -51,6 +77,30 @@
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static const unsigned short normal_i2c[] = { 0x48, 0x4a, 0x4b, I2C_CLIENT_END };
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static const u8 adt7411_in_alarm_reg[] = {
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ADT7411_REG_STAT_2,
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ADT7411_REG_STAT_1,
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ADT7411_REG_STAT_1,
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ADT7411_REG_STAT_1,
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ADT7411_REG_STAT_1,
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ADT7411_REG_STAT_2,
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ADT7411_REG_STAT_2,
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ADT7411_REG_STAT_2,
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ADT7411_REG_STAT_2,
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};
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static const u8 adt7411_in_alarm_bits[] = {
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ADT7411_STAT_2_VDD,
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ADT7411_STAT_1_EXT_TEMP_HIGH_AIN1,
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ADT7411_STAT_1_AIN2,
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ADT7411_STAT_1_AIN3,
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ADT7411_STAT_1_AIN4,
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ADT7411_STAT_2_AIN5,
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ADT7411_STAT_2_AIN6,
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ADT7411_STAT_2_AIN7,
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ADT7411_STAT_2_AIN8,
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};
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struct adt7411_data {
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struct mutex device_lock; /* for "atomic" device accesses */
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struct mutex update_lock;
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@ -165,6 +215,19 @@ static struct attribute *adt7411_attrs[] = {
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};
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ATTRIBUTE_GROUPS(adt7411);
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static int adt7411_read_in_alarm(struct device *dev, int channel, long *val)
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{
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struct adt7411_data *data = dev_get_drvdata(dev);
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struct i2c_client *client = data->client;
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int ret;
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ret = i2c_smbus_read_byte_data(client, adt7411_in_alarm_reg[channel]);
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if (ret < 0)
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return ret;
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*val = !!(ret & adt7411_in_alarm_bits[channel]);
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return 0;
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}
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static int adt7411_read_in_vdd(struct device *dev, u32 attr, long *val)
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{
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struct adt7411_data *data = dev_get_drvdata(dev);
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@ -179,11 +242,51 @@ static int adt7411_read_in_vdd(struct device *dev, u32 attr, long *val)
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return ret;
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*val = ret * 7000 / 1024;
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return 0;
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case hwmon_in_min:
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ret = i2c_smbus_read_byte_data(client, ADT7411_REG_VDD_LOW);
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if (ret < 0)
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return ret;
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*val = ret * 7000 / 256;
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return 0;
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case hwmon_in_max:
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ret = i2c_smbus_read_byte_data(client, ADT7411_REG_VDD_HIGH);
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if (ret < 0)
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return ret;
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*val = ret * 7000 / 256;
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return 0;
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case hwmon_in_alarm:
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return adt7411_read_in_alarm(dev, 0, val);
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default:
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return -EOPNOTSUPP;
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}
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}
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static int adt7411_update_vref(struct device *dev)
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{
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struct adt7411_data *data = dev_get_drvdata(dev);
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struct i2c_client *client = data->client;
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int val;
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if (time_after_eq(jiffies, data->next_update)) {
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val = i2c_smbus_read_byte_data(client, ADT7411_REG_CFG3);
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if (val < 0)
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return val;
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if (val & ADT7411_CFG3_REF_VDD) {
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val = adt7411_read_in_vdd(dev, hwmon_in_input,
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&data->vref_cached);
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if (val < 0)
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return val;
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} else {
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data->vref_cached = 2250;
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}
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data->next_update = jiffies + HZ;
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}
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return 0;
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}
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static int adt7411_read_in_chan(struct device *dev, u32 attr, int channel,
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long *val)
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{
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@ -191,26 +294,13 @@ static int adt7411_read_in_chan(struct device *dev, u32 attr, int channel,
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struct i2c_client *client = data->client;
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int ret;
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int lsb_reg, lsb_shift;
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int reg, lsb_reg, lsb_shift;
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int nr = channel - 1;
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mutex_lock(&data->update_lock);
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if (time_after_eq(jiffies, data->next_update)) {
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ret = i2c_smbus_read_byte_data(client, ADT7411_REG_CFG3);
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if (ret < 0)
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goto exit_unlock;
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if (ret & ADT7411_CFG3_REF_VDD) {
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ret = adt7411_read_in_vdd(dev, hwmon_in_input,
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&data->vref_cached);
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if (ret < 0)
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goto exit_unlock;
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} else {
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data->vref_cached = 2250;
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}
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data->next_update = jiffies + HZ;
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}
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ret = adt7411_update_vref(dev);
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if (ret < 0)
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goto exit_unlock;
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switch (attr) {
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case hwmon_in_input:
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@ -224,6 +314,20 @@ static int adt7411_read_in_chan(struct device *dev, u32 attr, int channel,
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*val = ret * data->vref_cached / 1024;
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ret = 0;
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break;
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case hwmon_in_min:
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case hwmon_in_max:
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reg = (attr == hwmon_in_min)
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? ADT7411_REG_IN_LOW(channel)
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: ADT7411_REG_IN_HIGH(channel);
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ret = i2c_smbus_read_byte_data(client, reg);
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if (ret < 0)
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goto exit_unlock;
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*val = ret * data->vref_cached / 256;
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ret = 0;
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break;
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case hwmon_in_alarm:
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ret = adt7411_read_in_alarm(dev, channel, val);
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break;
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default:
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ret = -EOPNOTSUPP;
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break;
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@ -242,12 +346,44 @@ static int adt7411_read_in(struct device *dev, u32 attr, int channel,
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return adt7411_read_in_chan(dev, attr, channel, val);
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}
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static int adt7411_read_temp_alarm(struct device *dev, u32 attr, int channel,
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long *val)
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{
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struct adt7411_data *data = dev_get_drvdata(dev);
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struct i2c_client *client = data->client;
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int ret, bit;
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ret = i2c_smbus_read_byte_data(client, ADT7411_REG_STAT_1);
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if (ret < 0)
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return ret;
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switch (attr) {
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case hwmon_temp_min_alarm:
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bit = channel ? ADT7411_STAT_1_EXT_TEMP_LOW
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: ADT7411_STAT_1_INT_TEMP_LOW;
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break;
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case hwmon_temp_max_alarm:
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bit = channel ? ADT7411_STAT_1_EXT_TEMP_HIGH_AIN1
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: ADT7411_STAT_1_INT_TEMP_HIGH;
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break;
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case hwmon_temp_fault:
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bit = ADT7411_STAT_1_EXT_TEMP_FAULT;
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break;
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default:
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return -EOPNOTSUPP;
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}
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*val = !!(ret & bit);
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return 0;
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}
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static int adt7411_read_temp(struct device *dev, u32 attr, int channel,
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long *val)
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{
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struct adt7411_data *data = dev_get_drvdata(dev);
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struct i2c_client *client = data->client;
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int ret, regl, regh;
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int ret, reg, regl, regh;
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switch (attr) {
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case hwmon_temp_input:
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@ -261,6 +397,21 @@ static int adt7411_read_temp(struct device *dev, u32 attr, int channel,
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ret = ret & 0x200 ? ret - 0x400 : ret; /* 10 bit signed */
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*val = ret * 250;
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return 0;
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case hwmon_temp_min:
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case hwmon_temp_max:
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reg = (attr == hwmon_temp_min)
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? ADT7411_REG_TEMP_LOW(channel)
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: ADT7411_REG_TEMP_HIGH(channel);
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ret = i2c_smbus_read_byte_data(client, reg);
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if (ret < 0)
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return ret;
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ret = ret & 0x80 ? ret - 0x100 : ret; /* 8 bit signed */
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*val = ret * 1000;
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return 0;
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case hwmon_temp_min_alarm:
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case hwmon_temp_max_alarm:
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case hwmon_temp_fault:
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return adt7411_read_temp_alarm(dev, attr, channel, val);
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default:
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return -EOPNOTSUPP;
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}
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@ -279,26 +430,143 @@ static int adt7411_read(struct device *dev, enum hwmon_sensor_types type,
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}
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}
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static int adt7411_write_in_vdd(struct device *dev, u32 attr, long val)
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{
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struct adt7411_data *data = dev_get_drvdata(dev);
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struct i2c_client *client = data->client;
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int reg;
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val = clamp_val(val, 0, 255 * 7000 / 256);
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val = DIV_ROUND_CLOSEST(val * 256, 7000);
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switch (attr) {
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case hwmon_in_min:
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reg = ADT7411_REG_VDD_LOW;
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break;
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case hwmon_in_max:
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reg = ADT7411_REG_VDD_HIGH;
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break;
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default:
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return -EOPNOTSUPP;
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}
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return i2c_smbus_write_byte_data(client, reg, val);
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}
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static int adt7411_write_in_chan(struct device *dev, u32 attr, int channel,
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long val)
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{
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struct adt7411_data *data = dev_get_drvdata(dev);
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struct i2c_client *client = data->client;
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int ret, reg;
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mutex_lock(&data->update_lock);
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ret = adt7411_update_vref(dev);
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if (ret < 0)
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goto exit_unlock;
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val = clamp_val(val, 0, 255 * data->vref_cached / 256);
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val = DIV_ROUND_CLOSEST(val * 256, data->vref_cached);
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switch (attr) {
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case hwmon_in_min:
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reg = ADT7411_REG_IN_LOW(channel);
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break;
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case hwmon_in_max:
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reg = ADT7411_REG_IN_HIGH(channel);
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break;
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default:
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ret = -EOPNOTSUPP;
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goto exit_unlock;
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}
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ret = i2c_smbus_write_byte_data(client, reg, val);
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exit_unlock:
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mutex_unlock(&data->update_lock);
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return ret;
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}
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static int adt7411_write_in(struct device *dev, u32 attr, int channel,
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long val)
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{
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if (channel == 0)
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return adt7411_write_in_vdd(dev, attr, val);
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else
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return adt7411_write_in_chan(dev, attr, channel, val);
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}
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static int adt7411_write_temp(struct device *dev, u32 attr, int channel,
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long val)
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{
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struct adt7411_data *data = dev_get_drvdata(dev);
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struct i2c_client *client = data->client;
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int reg;
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val = clamp_val(val, -128000, 127000);
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val = DIV_ROUND_CLOSEST(val, 1000);
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switch (attr) {
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case hwmon_temp_min:
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reg = ADT7411_REG_TEMP_LOW(channel);
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break;
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case hwmon_temp_max:
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reg = ADT7411_REG_TEMP_HIGH(channel);
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break;
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default:
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return -EOPNOTSUPP;
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}
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return i2c_smbus_write_byte_data(client, reg, val);
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}
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static int adt7411_write(struct device *dev, enum hwmon_sensor_types type,
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u32 attr, int channel, long val)
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{
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switch (type) {
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case hwmon_in:
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return adt7411_write_in(dev, attr, channel, val);
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case hwmon_temp:
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return adt7411_write_temp(dev, attr, channel, val);
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default:
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return -EOPNOTSUPP;
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}
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}
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static umode_t adt7411_is_visible(const void *_data,
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enum hwmon_sensor_types type,
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u32 attr, int channel)
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{
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const struct adt7411_data *data = _data;
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bool visible;
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switch (type) {
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case hwmon_in:
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if (channel > 0 && channel < 3)
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return data->use_ext_temp ? 0 : S_IRUGO;
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else
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return S_IRUGO;
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visible = channel == 0 || channel >= 3 || !data->use_ext_temp;
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switch (attr) {
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case hwmon_in_input:
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case hwmon_in_alarm:
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return visible ? S_IRUGO : 0;
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case hwmon_in_min:
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case hwmon_in_max:
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return visible ? S_IRUGO | S_IWUSR : 0;
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}
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break;
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case hwmon_temp:
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if (channel == 1)
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return data->use_ext_temp ? S_IRUGO : 0;
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else
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return S_IRUGO;
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visible = channel == 0 || data->use_ext_temp;
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switch (attr) {
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case hwmon_temp_input:
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case hwmon_temp_min_alarm:
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case hwmon_temp_max_alarm:
|
||||
case hwmon_temp_fault:
|
||||
return visible ? S_IRUGO : 0;
|
||||
case hwmon_temp_min:
|
||||
case hwmon_temp_max:
|
||||
return visible ? S_IRUGO | S_IWUSR : 0;
|
||||
}
|
||||
break;
|
||||
default:
|
||||
return 0;
|
||||
break;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int adt7411_detect(struct i2c_client *client,
|
||||
@ -372,15 +640,15 @@ static int adt7411_init_device(struct adt7411_data *data)
|
||||
}
|
||||
|
||||
static const u32 adt7411_in_config[] = {
|
||||
HWMON_I_INPUT,
|
||||
HWMON_I_INPUT,
|
||||
HWMON_I_INPUT,
|
||||
HWMON_I_INPUT,
|
||||
HWMON_I_INPUT,
|
||||
HWMON_I_INPUT,
|
||||
HWMON_I_INPUT,
|
||||
HWMON_I_INPUT,
|
||||
HWMON_I_INPUT,
|
||||
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM,
|
||||
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM,
|
||||
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM,
|
||||
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM,
|
||||
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM,
|
||||
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM,
|
||||
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM,
|
||||
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM,
|
||||
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM,
|
||||
0
|
||||
};
|
||||
|
||||
@ -390,8 +658,10 @@ static const struct hwmon_channel_info adt7411_in = {
|
||||
};
|
||||
|
||||
static const u32 adt7411_temp_config[] = {
|
||||
HWMON_T_INPUT,
|
||||
HWMON_T_INPUT,
|
||||
HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MIN_ALARM |
|
||||
HWMON_T_MAX | HWMON_T_MAX_ALARM,
|
||||
HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MIN_ALARM |
|
||||
HWMON_T_MAX | HWMON_T_MAX_ALARM | HWMON_T_FAULT,
|
||||
0
|
||||
};
|
||||
|
||||
@ -409,6 +679,7 @@ static const struct hwmon_channel_info *adt7411_info[] = {
|
||||
static const struct hwmon_ops adt7411_hwmon_ops = {
|
||||
.is_visible = adt7411_is_visible,
|
||||
.read = adt7411_read,
|
||||
.write = adt7411_write,
|
||||
};
|
||||
|
||||
static const struct hwmon_chip_info adt7411_chip_info = {
|
||||
|
||||
Loading…
Reference in New Issue
Block a user