+#define HMC5883_DATA_OUT_Z_MSB_REG 0x05
+#define HMC58X3_DATA_OUT_Z_LSB_REG 0x06
+#define HMC5883_DATA_OUT_Y_MSB_REG 0x07
+#define HMC5883_DATA_OUT_Y_LSB_REG 0x08
+#define HMC58X3_STATUS_REG 0x09
+#define HMC58X3_ID_REG_A 0x0A
+#define HMC58X3_ID_REG_B 0x0B
+#define HMC58X3_ID_REG_C 0x0C
+
+enum hmc5843_ids {
+ HMC5843_ID,
+ HMC5883_ID,
+ HMC5883L_ID,
+};
-#define HMC5843_ID_REG_LENGTH 0x03
-#define HMC5843_ID_STRING "H43"
+/*
+ * Beware: identification of the HMC5883 is still "H43";
+ * I2C address is also unchanged
+ */
+#define HMC58X3_ID_REG_LENGTH 0x03
+#define HMC58X3_ID_STRING "H43"
+#define HMC58X3_I2C_ADDRESS 0x1E
/*
- * Range settings in (+-)Ga
- * */
-#define RANGE_GAIN_OFFSET 0x05
-
-#define RANGE_0_7 0x00
-#define RANGE_1_0 0x01 /* default */
-#define RANGE_1_5 0x02
-#define RANGE_2_0 0x03
-#define RANGE_3_2 0x04
-#define RANGE_3_8 0x05
-#define RANGE_4_5 0x06
-#define RANGE_6_5 0x07 /* Not recommended */
+ * Range gain settings in (+-)Ga
+ * Beware: HMC5843 and HMC5883 have different recommended sensor field
+ * ranges; default corresponds to +-1.0 Ga and +-1.3 Ga, respectively
+ */
+#define HMC58X3_RANGE_GAIN_OFFSET 0x05
+#define HMC58X3_RANGE_GAIN_DEFAULT 0x01
+#define HMC58X3_RANGE_GAIN_MAX 0x07
/*
* Device status
*/
-#define DATA_READY 0x01
-#define DATA_OUTPUT_LOCK 0x02
-#define VOLTAGE_REGULATOR_ENABLED 0x04
+#define HMC58X3_DATA_READY 0x01
+#define HMC58X3_DATA_OUTPUT_LOCK 0x02
+/* Does not exist on HMC5883, not used */
+#define HMC58X3_VOLTAGE_REGULATOR_ENABLED 0x04
/*
* Mode register configuration
*/
-#define MODE_CONVERSION_CONTINUOUS 0x00
-#define MODE_CONVERSION_SINGLE 0x01
-#define MODE_IDLE 0x02
-#define MODE_SLEEP 0x03
-
-/* Minimum Data Output Rate in 1/10 Hz */
-#define RATE_OFFSET 0x02
-#define RATE_BITMASK 0x1C
-#define RATE_5 0x00
-#define RATE_10 0x01
-#define RATE_20 0x02
-#define RATE_50 0x03
-#define RATE_100 0x04
-#define RATE_200 0x05
-#define RATE_500 0x06
-#define RATE_NOT_USED 0x07
+#define HMC58X3_MODE_CONVERSION_CONTINUOUS 0x00
+#define HMC58X3_MODE_CONVERSION_SINGLE 0x01
+#define HMC58X3_MODE_IDLE 0x02
+#define HMC58X3_MODE_SLEEP 0x03
+#define HMC58X3_MODE_MASK 0x03
/*
- * Device Configuration
+ * HMC5843: Minimum data output rate
+ * HMC5883: Typical data output rate
*/
-#define CONF_NORMAL 0x00
-#define CONF_POSITIVE_BIAS 0x01
-#define CONF_NEGATIVE_BIAS 0x02
-#define CONF_NOT_USED 0x03
-#define MEAS_CONF_MASK 0x03
+#define HMC58X3_RATE_OFFSET 0x02
+#define HMC58X3_RATE_BITMASK 0x1C
+#define HMC58X3_RATE_NOT_USED 0x07
-static int hmc5843_regval_to_nanoscale[] = {
+/*
+ * Device measurement configuration
+ */
+#define HMC58X3_MEAS_CONF_NORMAL 0x00
+#define HMC58X3_MEAS_CONF_POSITIVE_BIAS 0x01
+#define HMC58X3_MEAS_CONF_NEGATIVE_BIAS 0x02
+#define HMC58X3_MEAS_CONF_NOT_USED 0x03
+#define HMC58X3_MEAS_CONF_MASK 0x03
+
+/*
+ * Scaling factors: 10000000/Gain
+ */
+static const int hmc5843_regval_to_nanoscale[] = {
6173, 7692, 10309, 12821, 18868, 21739, 25641, 35714
};
-static const int regval_to_input_field_mg[] = {
+static const int hmc5883_regval_to_nanoscale[] = {
+ 7812, 9766, 13021, 16287, 24096, 27701, 32573, 45662
+};
+
+static const int hmc5883l_regval_to_nanoscale[] = {
+ 7299, 9174, 12195, 15152, 22727, 25641, 30303, 43478
+};
+
+/*
+ * From the HMC5843 datasheet:
+ * Value | Sensor input field range (Ga) | Gain (counts/milli-Gauss)
+ * 0 | (+-)0.7 | 1620
+ * 1 | (+-)1.0 | 1300
+ * 2 | (+-)1.5 | 970
+ * 3 | (+-)2.0 | 780
+ * 4 | (+-)3.2 | 530
+ * 5 | (+-)3.8 | 460
+ * 6 | (+-)4.5 | 390
+ * 7 | (+-)6.5 | 280
+ *
+ * From the HMC5883 datasheet:
+ * Value | Recommended sensor field range (Ga) | Gain (counts/Gauss)
+ * 0 | (+-)0.9 | 1280
+ * 1 | (+-)1.2 | 1024
+ * 2 | (+-)1.9 | 768
+ * 3 | (+-)2.5 | 614
+ * 4 | (+-)4.0 | 415
+ * 5 | (+-)4.6 | 361
+ * 6 | (+-)5.5 | 307
+ * 7 | (+-)7.9 | 219
+ *
+ * From the HMC5883L datasheet:
+ * Value | Recommended sensor field range (Ga) | Gain (LSB/Gauss)
+ * 0 | (+-)0.88 | 1370
+ * 1 | (+-)1.3 | 1090
+ * 2 | (+-)1.9 | 820
+ * 3 | (+-)2.5 | 660
+ * 4 | (+-)4.0 | 440
+ * 5 | (+-)4.7 | 390
+ * 6 | (+-)5.6 | 330
+ * 7 | (+-)8.1 | 230
+ */
+static const int hmc5843_regval_to_input_field_mga[] = {
700,
1000,
1500,
@@ -108,7 +163,44 @@ static const int regval_to_input_field_mg[] = {
4500,
6500
};
-static const char * const regval_to_samp_freq[] = {
+
+static const int hmc5883_regval_to_input_field_mga[] = {
+ 900,
+ 1200,
+ 1900,
+ 2500,
+ 4000,
+ 4600,
+ 5500,
+ 7900
+};
+
+static const int hmc5883l_regval_to_input_field_mga[] = {
+ 880,
+ 1300,
+ 1900,
+ 2500,
+ 4000,
+ 4700,
+ 5600,
+ 8100
+};
+
+
+/*
+ * From the datasheet:
+ * Value | HMC5843 | HMC5883/HMC5883L
+ * | Data output rate (Hz) | Data output rate (Hz)
+ * 0 | 0.5 | 0.75
+ * 1 | 1 | 1.5
+ * 2 | 2 | 3
+ * 3 | 5 | 7.5
+ * 4 | 10 (default) | 15
+ * 5 | 20 | 30
+ * 6 | 50 | 75
+ * 7 | Not used | Not used
+ */
+static const char * const hmc5843_regval_to_samp_freq[] = {
"0.5",
"1",
"2",
@@ -118,28 +210,39 @@ static const char * const regval_to_samp_freq[] = {
"50",
};
+static const char * const hmc5883_regval_to_samp_freq[] = {
+ "0.75",
+ "1.5",
+ "3",
+ "7.5",
+ "15",
+ "30",
+ "75",
+};
+
/* Addresses to scan: 0x1E */
-static const unsigned short normal_i2c[] = { HMC5843_I2C_ADDRESS,
- I2C_CLIENT_END };
+static const unsigned short normal_i2c[] = { HMC58X3_I2C_ADDRESS,
+ I2C_CLIENT_END };
/* Each client has this additional data */
struct hmc5843_data {
struct mutex lock;
- u8 rate;
- u8 meas_conf;
- u8 operating_mode;
- u8 range;
+ u8 rate;
+ u8 meas_conf;
+ u8 operating_mode;
+ u8 range;
+ const char * const *regval_to_sample_freq;
+ const int *regval_to_input_field_mga;
+ const int *regval_to_nanoscale;
};
-static void hmc5843_init_client(struct i2c_client *client);
-
+/* The lower two bits contain the current conversion mode */
static s32 hmc5843_configure(struct i2c_client *client,
u8 operating_mode)
{
- /* The lower two bits contain the current conversion mode */
return i2c_smbus_write_byte_data(client,
- HMC5843_MODE_REG,
- (operating_mode& 0x03));
+ HMC58X3_MODE_REG,
+ operating_mode& HMC58X3_MODE_MASK);
}
/* Return the measurement value from the specified channel */
@@ -152,32 +255,31 @@ static int hmc5843_read_measurement(struct iio_dev *indio_dev,
s32 result;
mutex_lock(&data->lock);
- result = i2c_smbus_read_byte_data(client, HMC5843_STATUS_REG);
- while (!(result& DATA_READY))
- result = i2c_smbus_read_byte_data(client, HMC5843_STATUS_REG);
+ result = i2c_smbus_read_byte_data(client, HMC58X3_STATUS_REG);
+ while (!(result& HMC58X3_DATA_READY))
+ result = i2c_smbus_read_byte_data(client, HMC58X3_STATUS_REG);
result = i2c_smbus_read_word_data(client, address);
mutex_unlock(&data->lock);
if (result< 0)
return -EINVAL;
- *val = (s16)swab16((u16)result);
+ *val = (s16)swab16((u16)result);
return IIO_VAL_INT;
}
-
/*
- * From the datasheet
+ * From the datasheet:
* 0 - Continuous-Conversion Mode: In continuous-conversion mode, the
- * device continuously performs conversions and places the result in the
- * data register.
+ * device continuously performs conversions and places the result in
+ * the data register.
*
- * 1 - Single-Conversion Mode : device performs a single measurement,
- * sets RDY high and returned to sleep mode
+ * 1 - Single-Conversion Mode : Device performs a single measurement,
+ * sets RDY high and returns to sleep mode.
*
- * 2 - Idle Mode : Device is placed in idle mode.
+ * 2 - Idle Mode : Device is placed in idle mode.
*
- * 3 - Sleep Mode. Device is placed in sleep mode.
+ * 3 - Sleep Mode : Device is placed in sleep mode.
*
*/
static ssize_t hmc5843_show_operating_mode(struct device *dev,
@@ -201,14 +303,15 @@ static ssize_t hmc5843_set_operating_mode(struct device *dev,
unsigned long operating_mode = 0;
s32 status;
int error;
+
mutex_lock(&data->lock);
- error = strict_strtoul(buf, 10,&operating_mode);
+ error = kstrtoul(buf, 10,&operating_mode);
if (error) {
count = error;
goto exit;
}
- dev_dbg(dev, "set Conversion mode to %lu\n", operating_mode);
- if (operating_mode> MODE_SLEEP) {
+ dev_dbg(dev, "set conversion mode to %lu\n", operating_mode);
+ if (operating_mode> HMC58X3_MODE_SLEEP) {
count = -EINVAL;
goto exit;
}
@@ -225,35 +328,40 @@ exit:
mutex_unlock(&data->lock);
return count;
}
+
static IIO_DEVICE_ATTR(operating_mode,
S_IWUSR | S_IRUGO,
hmc5843_show_operating_mode,
hmc5843_set_operating_mode,
- HMC5843_MODE_REG);
+ HMC58X3_MODE_REG);
/*
* API for setting the measurement configuration to
* Normal, Positive bias and Negative bias
- * From the datasheet
*
- * Normal measurement configuration (default): In normal measurement
- * configuration the device follows normal measurement flow. Pins BP and BN
- * are left floating and high impedance.
+ * From the datasheet:
+ * 0 - Normal measurement configuration (default): In normal measurement
+ * configuration the device follows normal measurement flow. Pins BP
+ * and BN are left floating and high impedance.
*
- * Positive bias configuration: In positive bias configuration, a positive
- * current is forced across the resistive load on pins BP and BN.
+ * 1 - Positive bias configuration: In positive bias configuration, a
+ * positive current is forced across the resistive load on pins BP
+ * and BN.
*
- * Negative bias configuration. In negative bias configuration, a negative
- * current is forced across the resistive load on pins BP and BN.
+ * 2 - Negative bias configuration. In negative bias configuration, a
+ * negative current is forced across the resistive load on pins BP
+ * and BN.
*
*/
static s32 hmc5843_set_meas_conf(struct i2c_client *client,
u8 meas_conf)
{
- struct hmc5843_data *data = i2c_get_clientdata(client);
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct hmc5843_data *data = iio_priv(indio_dev);
u8 reg_val;
- reg_val = (meas_conf& MEAS_CONF_MASK) | (data->rate<< RATE_OFFSET);
- return i2c_smbus_write_byte_data(client, HMC5843_CONFIG_REG_A, reg_val);
+ reg_val = (meas_conf& HMC58X3_MEAS_CONF_MASK) |
+ (data->rate<< HMC58X3_RATE_OFFSET);
+ return i2c_smbus_write_byte_data(client, HMC58X3_CONFIG_REG_A, reg_val);
}
static ssize_t hmc5843_show_measurement_configuration(struct device *dev,
@@ -272,14 +380,18 @@ static ssize_t hmc5843_set_measurement_configuration(struct device *dev,
{
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct i2c_client *client = to_i2c_client(indio_dev->dev.parent);
- struct hmc5843_data *data = i2c_get_clientdata(client);
+ struct hmc5843_data *data = iio_priv(indio_dev);
unsigned long meas_conf = 0;
- int error = strict_strtoul(buf, 10,&meas_conf);
+ int error;
+
+ error = kstrtoul(buf, 10,&meas_conf);
if (error)
return error;
- mutex_lock(&data->lock);
+ if (meas_conf>= HMC58X3_MEAS_CONF_NOT_USED)
+ return -EINVAL;
- dev_dbg(dev, "set mode to %lu\n", meas_conf);
+ mutex_lock(&data->lock);
+ dev_dbg(dev, "set measurement configuration to %lu\n", meas_conf);
if (hmc5843_set_meas_conf(client, meas_conf)) {
count = -EINVAL;
goto exit;
@@ -290,43 +402,65 @@ exit:
mutex_unlock(&data->lock);
return count;
}
+
static IIO_DEVICE_ATTR(meas_conf,
S_IWUSR | S_IRUGO,
hmc5843_show_measurement_configuration,
hmc5843_set_measurement_configuration,
0);
-/*
- * From Datasheet
- * The table shows the minimum data output
- * Value | Minimum data output rate(Hz)
- * 0 | 0.5
- * 1 | 1
- * 2 | 2
- * 3 | 5
- * 4 | 10 (default)
- * 5 | 20
- * 6 | 50
- * 7 | Not used
- */
-static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("0.5 1 2 5 10 20 50");
+static ssize_t hmc5843_show_sampling_frequencies_available(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct hmc5843_data *data = iio_priv(indio_dev);
+
+ char str[128] = "";
+ int i;
+
+ for (i = 0; i< HMC58X3_RATE_NOT_USED; i++) {
+ strcat(str, data->regval_to_sample_freq[i]);
+ strcat(str, " ");
+ }
+
+ return sprintf(buf, "%s", str);
+}
+
+static IIO_DEV_ATTR_SAMP_FREQ_AVAIL(hmc5843_show_sampling_frequencies_available);
static s32 hmc5843_set_rate(struct i2c_client *client,
u8 rate)
{
- struct hmc5843_data *data = i2c_get_clientdata(client);
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct hmc5843_data *data = iio_priv(indio_dev);
u8 reg_val;
- reg_val = (data->meas_conf) | (rate<< RATE_OFFSET);
- if (rate>= RATE_NOT_USED) {
+ if (rate>= HMC58X3_RATE_NOT_USED) {
dev_err(&client->dev,
- "This data output rate is not supported\n");
+ "data output rate is not supported\n");
return -EINVAL;
}
- return i2c_smbus_write_byte_data(client, HMC5843_CONFIG_REG_A, reg_val);
+ reg_val = data->meas_conf | (rate<< HMC58X3_RATE_OFFSET);
+ return i2c_smbus_write_byte_data(client, HMC58X3_CONFIG_REG_A, reg_val);
}
-static ssize_t set_sampling_frequency(struct device *dev,
+static int hmc5843_check_sampling_frequency(struct hmc5843_data *data,
+ const char *buf)
+{
+ const char * const *samp_freq = data->regval_to_sample_freq;
+ int i;
+
+ for (i = 0; i< HMC58X3_RATE_NOT_USED; i++) {
+ if (strncmp(buf, samp_freq[i],
+ strlen(samp_freq[i])) == 0)
+ return i;
+ }
+
+ return -EINVAL;
+}
+
+static ssize_t hmc5843_set_sampling_frequency(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
@@ -334,27 +468,17 @@ static ssize_t set_sampling_frequency(struct device *dev,
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct i2c_client *client = to_i2c_client(indio_dev->dev.parent);
struct hmc5843_data *data = iio_priv(indio_dev);
- unsigned long rate = 0;
-
- if (strncmp(buf, "0.5" , 3) == 0)
- rate = RATE_5;
- else if (strncmp(buf, "1" , 1) == 0)
- rate = RATE_10;
- else if (strncmp(buf, "2", 1) == 0)
- rate = RATE_20;
- else if (strncmp(buf, "5", 1) == 0)
- rate = RATE_50;
- else if (strncmp(buf, "10", 2) == 0)
- rate = RATE_100;
- else if (strncmp(buf, "20" , 2) == 0)
- rate = RATE_200;
- else if (strncmp(buf, "50" , 2) == 0)
- rate = RATE_500;
- else
- return -EINVAL;
+ int rate;
+
+ rate = hmc5843_check_sampling_frequency(data, buf);
+ if (rate< 0) {
+ dev_err(&client->dev,
+ "sampling frequency is not supported\n");
+ return rate;
+ }
mutex_lock(&data->lock);
- dev_dbg(dev, "set rate to %lu\n", rate);
+ dev_dbg(dev, "set rate to %d\n", rate);
if (hmc5843_set_rate(client, rate)) {
count = -EINVAL;
goto exit;
@@ -366,40 +490,29 @@ exit:
return count;
}
-static ssize_t show_sampling_frequency(struct device *dev,
+static ssize_t hmc5843_show_sampling_frequency(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct i2c_client *client = to_i2c_client(indio_dev->dev.parent);
struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
+ struct hmc5843_data *data = iio_priv(indio_dev);
s32 rate;
- rate = i2c_smbus_read_byte_data(client, this_attr->address);
+ rate = i2c_smbus_read_byte_data(client, this_attr->address);
if (rate< 0)
return rate;
- rate = (rate& RATE_BITMASK)>> RATE_OFFSET;
- return sprintf(buf, "%s\n", regval_to_samp_freq[rate]);
+ rate = (rate& HMC58X3_RATE_BITMASK)>> HMC58X3_RATE_OFFSET;
+ return sprintf(buf, "%s\n", data->regval_to_sample_freq[rate]);
}
+
static IIO_DEVICE_ATTR(sampling_frequency,
S_IWUSR | S_IRUGO,
- show_sampling_frequency,
- set_sampling_frequency,
- HMC5843_CONFIG_REG_A);
+ hmc5843_show_sampling_frequency,
+ hmc5843_set_sampling_frequency,
+ HMC58X3_CONFIG_REG_A);
-/*
- * From Datasheet
- * Nominal gain settings
- * Value | Sensor Input Field Range(Ga) | Gain(counts/ milli-gauss)
- *0 |(+-)0.7 |1620
- *1 |(+-)1.0 |1300
- *2 |(+-)1.5 |970
- *3 |(+-)2.0 |780
- *4 |(+-)3.2 |530
- *5 |(+-)3.8 |460
- *6 |(+-)4.5 |390
- *7 |(+-)6.5 |280
- */
-static ssize_t show_range(struct device *dev,
+static ssize_t hmc5843_show_range_gain(struct device *dev,
struct device_attribute *attr,
char *buf)
{
@@ -408,10 +521,10 @@ static ssize_t show_range(struct device *dev,
struct hmc5843_data *data = iio_priv(indio_dev);
range = data->range;
- return sprintf(buf, "%d\n", regval_to_input_field_mg[range]);
+ return sprintf(buf, "%d\n", data->regval_to_input_field_mga[range]);
}
-static ssize_t set_range(struct device *dev,
+static ssize_t hmc5843_set_range_gain(struct device *dev,
struct device_attribute *attr,
const char *buf,
size_t count)
@@ -422,34 +535,35 @@ static ssize_t set_range(struct device *dev,
struct hmc5843_data *data = iio_priv(indio_dev);
unsigned long range = 0;
int error;
+
mutex_lock(&data->lock);
- error = strict_strtoul(buf, 10,&range);
+ error = kstrtoul(buf, 10,&range);
if (error) {
count = error;
goto exit;
}
dev_dbg(dev, "set range to %lu\n", range);
- if (range> RANGE_6_5) {
+ if (range> HMC58X3_RANGE_GAIN_MAX) {
count = -EINVAL;
goto exit;
}
data->range = range;
- range = range<< RANGE_GAIN_OFFSET;
+ range = range<< HMC58X3_RANGE_GAIN_OFFSET;
if (i2c_smbus_write_byte_data(client, this_attr->address, range))
count = -EINVAL;
exit:
mutex_unlock(&data->lock);
return count;
-
}
+
static IIO_DEVICE_ATTR(in_magn_range,
S_IWUSR | S_IRUGO,
- show_range,
- set_range,
- HMC5843_CONFIG_REG_B);
+ hmc5843_show_range_gain,
+ hmc5843_set_range_gain,
+ HMC58X3_CONFIG_REG_B);
static int hmc5843_read_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan,
@@ -465,7 +579,7 @@ static int hmc5843_read_raw(struct iio_dev *indio_dev,
val);
case IIO_CHAN_INFO_SCALE:
*val = 0;
- *val2 = hmc5843_regval_to_nanoscale[data->range];
+ *val2 = data->regval_to_nanoscale[data->range];
return IIO_VAL_INT_PLUS_NANO;
};
return -EINVAL;
@@ -482,17 +596,24 @@ static int hmc5843_read_raw(struct iio_dev *indio_dev,
}
static const struct iio_chan_spec hmc5843_channels[] = {
- HMC5843_CHANNEL(X, HMC5843_DATA_OUT_X_MSB_REG),
+ HMC5843_CHANNEL(X, HMC58X3_DATA_OUT_X_MSB_REG),
HMC5843_CHANNEL(Y, HMC5843_DATA_OUT_Y_MSB_REG),
HMC5843_CHANNEL(Z, HMC5843_DATA_OUT_Z_MSB_REG),
};
+static const struct iio_chan_spec hmc5883_channels[] = {
+ HMC5843_CHANNEL(X, HMC58X3_DATA_OUT_X_MSB_REG),
+ HMC5843_CHANNEL(Y, HMC5883_DATA_OUT_Y_MSB_REG),
+ HMC5843_CHANNEL(Z, HMC5883_DATA_OUT_Z_MSB_REG),
+};
+
+
static struct attribute *hmc5843_attributes[] = {
&iio_dev_attr_meas_conf.dev_attr.attr,
&iio_dev_attr_operating_mode.dev_attr.attr,
&iio_dev_attr_sampling_frequency.dev_attr.attr,
&iio_dev_attr_in_magn_range.dev_attr.attr,
- &iio_const_attr_sampling_frequency_available.dev_attr.attr,
+ &iio_dev_attr_sampling_frequency_available.dev_attr.attr,
NULL
};
@@ -503,32 +624,63 @@ static const struct attribute_group hmc5843_group = {
static int hmc5843_detect(struct i2c_client *client,
struct i2c_board_info *info)
{
- unsigned char id_str[HMC5843_ID_REG_LENGTH];
+ unsigned char id_str[HMC58X3_ID_REG_LENGTH];
- if (client->addr != HMC5843_I2C_ADDRESS)
+ if (client->addr != HMC58X3_I2C_ADDRESS)
return -ENODEV;
- if (i2c_smbus_read_i2c_block_data(client, HMC5843_ID_REG_A,
- HMC5843_ID_REG_LENGTH, id_str)
- != HMC5843_ID_REG_LENGTH)
+ if (i2c_smbus_read_i2c_block_data(client, HMC58X3_ID_REG_A,
+ HMC58X3_ID_REG_LENGTH, id_str)
+ != HMC58X3_ID_REG_LENGTH)
return -ENODEV;
- if (0 != strncmp(id_str, HMC5843_ID_STRING, HMC5843_ID_REG_LENGTH))
+ if (0 != strncmp(id_str, HMC58X3_ID_STRING, HMC58X3_ID_REG_LENGTH))
return -ENODEV;
return 0;
}
-/* Called when we have found a new HMC5843. */
-static void hmc5843_init_client(struct i2c_client *client)
+/* Called when we have found a new HMC58X3 */
+static void hmc5843_init_client(struct i2c_client *client,
+ const struct i2c_device_id *id)
{
- struct hmc5843_data *data = i2c_get_clientdata(client);
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct hmc5843_data *data = iio_priv(indio_dev);
+
+ switch (id->driver_data) {
+ case HMC5843_ID:
+ data->regval_to_sample_freq = hmc5843_regval_to_samp_freq;
+ data->regval_to_input_field_mga =
+ hmc5843_regval_to_input_field_mga;
+ data->regval_to_nanoscale = hmc5843_regval_to_nanoscale;
+ indio_dev->channels = hmc5843_channels;
+ indio_dev->num_channels = ARRAY_SIZE(hmc5843_channels);
+ break;
+ case HMC5883_ID:
+ data->regval_to_sample_freq = hmc5883_regval_to_samp_freq;
+ data->regval_to_input_field_mga =
+ hmc5883_regval_to_input_field_mga;
+ data->regval_to_nanoscale = hmc5883_regval_to_nanoscale;
+ indio_dev->channels = hmc5883_channels;
+ indio_dev->num_channels = ARRAY_SIZE(hmc5883_channels);
+ break;
+ case HMC5883L_ID:
+ data->regval_to_sample_freq = hmc5883_regval_to_samp_freq;
+ data->regval_to_input_field_mga =
+ hmc5883l_regval_to_input_field_mga;
+ data->regval_to_nanoscale = hmc5883l_regval_to_nanoscale;
+ indio_dev->channels = hmc5883_channels;
+ indio_dev->num_channels = ARRAY_SIZE(hmc5883_channels);
+ break;
+ }
+
hmc5843_set_meas_conf(client, data->meas_conf);
hmc5843_set_rate(client, data->rate);
hmc5843_configure(client, data->operating_mode);
- i2c_smbus_write_byte_data(client, HMC5843_CONFIG_REG_B, data->range);
+ i2c_smbus_write_byte_data(client, HMC58X3_CONFIG_REG_B, data->range);
mutex_init(&data->lock);
- pr_info("HMC5843 initialized\n");
+
+ pr_info("%s initialized\n", id->name);
}
static const struct iio_info hmc5843_info = {
@@ -549,28 +701,27 @@ static int hmc5843_probe(struct i2c_client *client,
err = -ENOMEM;
goto exit;
}
- data = iio_priv(indio_dev);
- /* default settings at probe */
- data->meas_conf = CONF_NORMAL;
- data->range = RANGE_1_0;
- data->operating_mode = MODE_CONVERSION_CONTINUOUS;
+ /* default settings at probe */
+ data = iio_priv(indio_dev);
+ data->meas_conf = HMC58X3_MEAS_CONF_NORMAL;
+ data->range = HMC58X3_RANGE_GAIN_DEFAULT;
+ data->operating_mode = HMC58X3_MODE_CONVERSION_CONTINUOUS;
i2c_set_clientdata(client, indio_dev);
-
- /* Initialize the HMC5843 chip */
- hmc5843_init_client(client);
+ hmc5843_init_client(client, id);
indio_dev->info =&hmc5843_info;
indio_dev->name = id->name;
- indio_dev->channels = hmc5843_channels;
- indio_dev->num_channels = ARRAY_SIZE(hmc5843_channels);
indio_dev->dev.parent =&client->dev;
indio_dev->modes = INDIO_DIRECT_MODE;
+
err = iio_device_register(indio_dev);
if (err)
goto exit_free2;
+
return 0;
+
exit_free2:
iio_device_free(indio_dev);
exit:
@@ -583,7 +734,7 @@ static int hmc5843_remove(struct i2c_client *client)
iio_device_unregister(indio_dev);
/* sleep mode to save power */
- hmc5843_configure(client, MODE_SLEEP);
+ hmc5843_configure(client, HMC58X3_MODE_SLEEP);
iio_device_free(indio_dev);
return 0;
@@ -592,14 +743,16 @@ static int hmc5843_remove(struct i2c_client *client)
#ifdef CONFIG_PM_SLEEP
static int hmc5843_suspend(struct device *dev)
{
- hmc5843_configure(to_i2c_client(dev), MODE_SLEEP);
+ hmc5843_configure(to_i2c_client(dev), HMC58X3_MODE_SLEEP);
return 0;
}
static int hmc5843_resume(struct device *dev)
{
- struct hmc5843_data *data = i2c_get_clientdata(to_i2c_client(dev));
- hmc5843_configure(to_i2c_client(dev), data->operating_mode);
+ struct i2c_client *client = to_i2c_client(dev);
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct hmc5843_data *data = iio_priv(indio_dev);
+ hmc5843_configure(client, data->operating_mode);
return 0;
}
@@ -610,7 +763,9 @@ static SIMPLE_DEV_PM_OPS(hmc5843_pm_ops, hmc5843_suspend, hmc5843_resume);
#endif
static const struct i2c_device_id hmc5843_id[] = {
- { "hmc5843", 0 },
+ { "hmc5843", HMC5843_ID },
+ { "hmc5883", HMC5883_ID },
+ { "hmc5883l", HMC5883L_ID },
{ }
};
MODULE_DEVICE_TABLE(i2c, hmc5843_id);
@@ -629,5 +784,5 @@ static struct i2c_driver hmc5843_driver = {
module_i2c_driver(hmc5843_driver);
MODULE_AUTHOR("Shubhrajyoti Datta<shubhrajyoti@xxxxxx");
-MODULE_DESCRIPTION("HMC5843 driver");
+MODULE_DESCRIPTION("HMC5843/5883/5883L driver");
MODULE_LICENSE("GPL");
