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staging: iio: rename and prefix CONSTANTs to distinguish between HMC5843 and HMC5883 

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Peter Meerwald 2012-05-16 18:22:05 +02:00 committed by Greg Kroah-Hartman
parent d32ec5518f
commit 16b91a40ea
1 changed files with 72 additions and 58 deletions
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130
drivers/staging/iio/magnetometer/hmc5843.c
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@ -25,8 +25,6 @@
#include <linux/iio/iio.h> #include <linux/iio/iio.h>
#include <linux/iio/sysfs.h> #include <linux/iio/sysfs.h>
#define HMC5843_I2C_ADDRESS 0x1E
#define HMC5843_CONFIG_REG_A 0x00 #define HMC5843_CONFIG_REG_A 0x00
#define HMC5843_CONFIG_REG_B 0x01 #define HMC5843_CONFIG_REG_B 0x01
#define HMC5843_MODE_REG 0x02 #define HMC5843_MODE_REG 0x02
@ -36,65 +34,80 @@
#define HMC5843_DATA_OUT_Y_LSB_REG 0x06 #define HMC5843_DATA_OUT_Y_LSB_REG 0x06
#define HMC5843_DATA_OUT_Z_MSB_REG 0x07 #define HMC5843_DATA_OUT_Z_MSB_REG 0x07
#define HMC5843_DATA_OUT_Z_LSB_REG 0x08 #define HMC5843_DATA_OUT_Z_LSB_REG 0x08
/* Beware: Y and Z are exchanged on HMC5883 */
#define HMC5883_DATA_OUT_Z_MSB_REG 0x05
#define HMC5883_DATA_OUT_Z_LSB_REG 0x06
#define HMC5883_DATA_OUT_Y_MSB_REG 0x07
#define HMC5883_DATA_OUT_Y_LSB_REG 0x08
#define HMC5843_STATUS_REG 0x09 #define HMC5843_STATUS_REG 0x09
#define HMC5843_ID_REG_A 0x0A #define HMC5843_ID_REG_A 0x0A
#define HMC5843_ID_REG_B 0x0B #define HMC5843_ID_REG_B 0x0B
#define HMC5843_ID_REG_C 0x0C #define HMC5843_ID_REG_C 0x0C
#define HMC5843_ID_REG_LENGTH 0x03
#define HMC5843_ID_STRING "H43"
/* /*
* Range settings in (+-)Ga * Beware: identification of the HMC5883 is still "H43";
* */ * I2C address is also unchanged
#define RANGE_GAIN_OFFSET 0x05 */
#define HMC5843_ID_REG_LENGTH 0x03
#define HMC5843_ID_STRING "H43"
#define HMC5843_I2C_ADDRESS 0x1E
#define RANGE_0_7 0x00 /*
#define RANGE_1_0 0x01 /* default */ * Range gain settings in (+-)Ga
#define RANGE_1_5 0x02 * Beware: HMC5843 and HMC5883 have different recommended sensor field
#define RANGE_2_0 0x03 * ranges; default corresponds to +-1.0 Ga and +-1.3 Ga, respectively
#define RANGE_3_2 0x04 */
#define RANGE_3_8 0x05 #define HMC5843_RANGE_GAIN_OFFSET 0x05
#define RANGE_4_5 0x06 #define HMC5843_RANGE_GAIN_DEFAULT 0x01
#define RANGE_6_5 0x07 /* Not recommended */ #define HMC5843_RANGE_GAIN_MAX 0x07
/* /*
* Device status * Device status
*/ */
#define DATA_READY 0x01 #define HMC5843_DATA_READY 0x01
#define DATA_OUTPUT_LOCK 0x02 #define HMC5843_DATA_OUTPUT_LOCK 0x02
#define VOLTAGE_REGULATOR_ENABLED 0x04 /* Does not exist on HMC5883, not used */
#define HMC5843_VOLTAGE_REGULATOR_ENABLED 0x04
/* /*
* Mode register configuration * Mode register configuration
*/ */
#define MODE_CONVERSION_CONTINUOUS 0x00 #define HMC5843_MODE_CONVERSION_CONTINUOUS 0x00
#define MODE_CONVERSION_SINGLE 0x01 #define HMC5843_MODE_CONVERSION_SINGLE 0x01
#define MODE_IDLE 0x02 #define HMC5843_MODE_IDLE 0x02
#define MODE_SLEEP 0x03 #define HMC5843_MODE_SLEEP 0x03
#define HMC5843_MODE_MASK 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
/* /*
* Device Configuration * HMC5843: Minimum data output rate
* HMC5883: Typical data output rate
*/ */
#define CONF_NORMAL 0x00 #define HMC5843_RATE_OFFSET 0x02
#define CONF_POSITIVE_BIAS 0x01 #define HMC5843_RATE_BITMASK 0x1C
#define CONF_NEGATIVE_BIAS 0x02 #define RATE_5 0x00
#define CONF_NOT_USED 0x03 #define RATE_10 0x01
#define MEAS_CONF_MASK 0x03 #define RATE_20 0x02
#define RATE_50 0x03
#define RATE_100 0x04
#define RATE_200 0x05
#define RATE_500 0x06
static int hmc5843_regval_to_nanoscale[] = { #define HMC5843_RATE_NOT_USED 0x07
/*
* Device measurement configuration
*/
#define HMC5843_MEAS_CONF_NORMAL 0x00
#define HMC5843_MEAS_CONF_POSITIVE_BIAS 0x01
#define HMC5843_MEAS_CONF_NEGATIVE_BIAS 0x02
#define HMC5843_MEAS_CONF_NOT_USED 0x03
#define HMC5843_MEAS_CONF_MASK 0x03
/*
* Scaling factors: 10000000/Gain
*/
static const int hmc5843_regval_to_nanoscale[] = {
6173, 7692, 10309, 12821, 18868, 21739, 25641, 35714 6173, 7692, 10309, 12821, 18868, 21739, 25641, 35714
}; };
@ -120,7 +133,7 @@ static const char * const regval_to_samp_freq[] = {
/* Addresses to scan: 0x1E */ /* Addresses to scan: 0x1E */
static const unsigned short normal_i2c[] = { HMC5843_I2C_ADDRESS, static const unsigned short normal_i2c[] = { HMC5843_I2C_ADDRESS,
I2C_CLIENT_END }; I2C_CLIENT_END };
/* Each client has this additional data */ /* Each client has this additional data */
struct hmc5843_data { struct hmc5843_data {
@ -139,7 +152,7 @@ static s32 hmc5843_configure(struct i2c_client *client,
/* The lower two bits contain the current conversion mode */ /* The lower two bits contain the current conversion mode */
return i2c_smbus_write_byte_data(client, return i2c_smbus_write_byte_data(client,
HMC5843_MODE_REG, HMC5843_MODE_REG,
(operating_mode & 0x03)); operating_mode & HMC5843_MODE_MASK);
} }
/* Return the measurement value from the specified channel */ /* Return the measurement value from the specified channel */
@ -153,7 +166,7 @@ static int hmc5843_read_measurement(struct iio_dev *indio_dev,
mutex_lock(&data->lock); mutex_lock(&data->lock);
result = i2c_smbus_read_byte_data(client, HMC5843_STATUS_REG); result = i2c_smbus_read_byte_data(client, HMC5843_STATUS_REG);
while (!(result & DATA_READY)) while (!(result & HMC5843_DATA_READY))
result = i2c_smbus_read_byte_data(client, HMC5843_STATUS_REG); result = i2c_smbus_read_byte_data(client, HMC5843_STATUS_REG);
result = i2c_smbus_read_word_data(client, address); result = i2c_smbus_read_word_data(client, address);
@ -208,7 +221,7 @@ static ssize_t hmc5843_set_operating_mode(struct device *dev,
goto exit; goto exit;
} }
dev_dbg(dev, "set Conversion mode to %lu\n", operating_mode); dev_dbg(dev, "set Conversion mode to %lu\n", operating_mode);
if (operating_mode > MODE_SLEEP) { if (operating_mode > HMC5843_MODE_SLEEP) {
count = -EINVAL; count = -EINVAL;
goto exit; goto exit;
} }
@ -253,7 +266,8 @@ static s32 hmc5843_set_meas_conf(struct i2c_client *client,
struct iio_dev *indio_dev = i2c_get_clientdata(client); struct iio_dev *indio_dev = i2c_get_clientdata(client);
struct hmc5843_data *data = iio_priv(indio_dev); struct hmc5843_data *data = iio_priv(indio_dev);
u8 reg_val; u8 reg_val;
reg_val = (meas_conf & MEAS_CONF_MASK) | (data->rate << RATE_OFFSET); reg_val = (meas_conf & HMC5843_MEAS_CONF_MASK) |
(data->rate << HMC5843_RATE_OFFSET);
return i2c_smbus_write_byte_data(client, HMC5843_CONFIG_REG_A, reg_val); return i2c_smbus_write_byte_data(client, HMC5843_CONFIG_REG_A, reg_val);
} }
@ -319,8 +333,8 @@ static s32 hmc5843_set_rate(struct i2c_client *client,
struct hmc5843_data *data = iio_priv(indio_dev); struct hmc5843_data *data = iio_priv(indio_dev);
u8 reg_val; u8 reg_val;
reg_val = (data->meas_conf) | (rate << RATE_OFFSET); reg_val = (data->meas_conf) | (rate << HMC5843_RATE_OFFSET);
if (rate >= RATE_NOT_USED) { if (rate >= HMC5843_RATE_NOT_USED) {
dev_err(&client->dev, dev_err(&client->dev,
"This data output rate is not supported\n"); "This data output rate is not supported\n");
return -EINVAL; return -EINVAL;
@ -379,7 +393,7 @@ static ssize_t show_sampling_frequency(struct device *dev,
rate = i2c_smbus_read_byte_data(client, this_attr->address); rate = i2c_smbus_read_byte_data(client, this_attr->address);
if (rate < 0) if (rate < 0)
return rate; return rate;
rate = (rate & RATE_BITMASK) >> RATE_OFFSET; rate = (rate & HMC5843_RATE_BITMASK) >> HMC5843_RATE_OFFSET;
return sprintf(buf, "%s\n", regval_to_samp_freq[rate]); return sprintf(buf, "%s\n", regval_to_samp_freq[rate]);
} }
static IIO_DEVICE_ATTR(sampling_frequency, static IIO_DEVICE_ATTR(sampling_frequency,
@ -432,13 +446,13 @@ static ssize_t set_range(struct device *dev,
} }
dev_dbg(dev, "set range to %lu\n", range); dev_dbg(dev, "set range to %lu\n", range);
if (range > RANGE_6_5) { if (range > HMC5843_RANGE_GAIN_MAX) {
count = -EINVAL; count = -EINVAL;
goto exit; goto exit;
} }
data->range = range; data->range = range;
range = range << RANGE_GAIN_OFFSET; range = range << HMC5843_RANGE_GAIN_OFFSET;
if (i2c_smbus_write_byte_data(client, this_attr->address, range)) if (i2c_smbus_write_byte_data(client, this_attr->address, range))
count = -EINVAL; count = -EINVAL;
@ -553,12 +567,12 @@ static int hmc5843_probe(struct i2c_client *client,
err = -ENOMEM; err = -ENOMEM;
goto exit; goto exit;
} }
data = iio_priv(indio_dev);
/* default settings at probe */
data->meas_conf = CONF_NORMAL; /* default settings at probe */
data->range = RANGE_1_0; data = iio_priv(indio_dev);
data->operating_mode = MODE_CONVERSION_CONTINUOUS; data->meas_conf = HMC5843_MEAS_CONF_NORMAL;
data->range = HMC5843_RANGE_GAIN_DEFAULT;
data->operating_mode = HMC5843_MODE_CONVERSION_CONTINUOUS;
i2c_set_clientdata(client, indio_dev); i2c_set_clientdata(client, indio_dev);
@ -587,7 +601,7 @@ static int hmc5843_remove(struct i2c_client *client)
iio_device_unregister(indio_dev); iio_device_unregister(indio_dev);
/* sleep mode to save power */ /* sleep mode to save power */
hmc5843_configure(client, MODE_SLEEP); hmc5843_configure(client, HMC5843_MODE_SLEEP);
iio_device_free(indio_dev); iio_device_free(indio_dev);
return 0; return 0;
@ -596,7 +610,7 @@ static int hmc5843_remove(struct i2c_client *client)
#ifdef CONFIG_PM_SLEEP #ifdef CONFIG_PM_SLEEP
static int hmc5843_suspend(struct device *dev) static int hmc5843_suspend(struct device *dev)
{ {
hmc5843_configure(to_i2c_client(dev), MODE_SLEEP); hmc5843_configure(to_i2c_client(dev), HMC5843_MODE_SLEEP);
return 0; return 0;
} }