static s32 show_bus_voltage(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct ina230_data *data = i2c_get_clientdata(client);
s32 voltage_mV;
int retval;
mutex_lock(&data->mutex);
retval = ensure_enabled_start(client);
if (retval < 0) {
mutex_unlock(&data->mutex);
return retval;
}
/* getting voltage readings in milli volts*/
voltage_mV =
(s16)be16_to_cpu(i2c_smbus_read_word_data(client,
INA230_VOLTAGE));
ensure_enabled_end(client);
mutex_unlock(&data->mutex);
if (voltage_mV < 0) {
dev_err(dev, "%s: failed\n", __func__);
return -1;
}
voltage_mV = busv_register_to_mv(voltage_mV);
return sprintf(buf, "%d mV\n", voltage_mV);
}
static s32 show_shunt_voltage(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct ina230_data *data = i2c_get_clientdata(client);
s32 voltage_uV;
int retval;
mutex_lock(&data->mutex);
retval = ensure_enabled_start(client);
if (retval < 0) {
mutex_unlock(&data->mutex);
return retval;
}
voltage_uV =
(s16)be16_to_cpu(i2c_smbus_read_word_data(client,
INA230_SHUNT));
ensure_enabled_end(client);
mutex_unlock(&data->mutex);
voltage_uV = shuntv_register_to_uv(voltage_uV);
return sprintf(buf, "%d uV\n", voltage_uV);
}
s32 ina230_get_batt_volt(void)
{
struct i2c_client *client = to_i2c_client(this_dev);
struct ina230_data *data = i2c_get_clientdata(client);
s32 voltage_mV;
int retval;
mutex_lock(&data->mutex);
retval = ensure_enabled_start(client);
if (retval < 0) {
mutex_unlock(&data->mutex);
return retval;
}
/* getting voltage readings in milli volts*/
voltage_mV =
(s16)be16_to_cpu(i2c_smbus_read_word_data(client,
INA230_VOLTAGE));
ensure_enabled_end(client);
mutex_unlock(&data->mutex);
if (voltage_mV < 0) {
dev_err(this_dev, "%s: failed\n", __func__);
return -1;
}
voltage_mV = busv_register_to_mv(voltage_mV);
return voltage_mV;
}
s32 ina230_get_batt_curr(void)
{
struct i2c_client *client = to_i2c_client(this_dev);
struct ina230_data *data = i2c_get_clientdata(client);
s32 current_mA;
int retval;
mutex_lock(&data->mutex);
retval = ensure_enabled_start(client);
if (retval < 0) {
mutex_unlock(&data->mutex);
return 0;
}
/* getting current readings in milli amps */
current_mA =
(s16)be16_to_cpu(i2c_smbus_read_word_data(client,
INA230_CURRENT));
ensure_enabled_end(client);
mutex_unlock(&data->mutex);
current_mA = currenta_register_to_ma(current_mA);
return current_mA;
}
s32 ina230_get_current(void)
{
struct i2c_client *client;
struct ina230_data *data;
s32 current_mA;
int retval;
if (!p_ina230_data)
return INA230_ERROR;
client = p_ina230_data->client;
data = p_ina230_data;
mutex_lock(&data->mutex);
/* fill calib data */
retval = i2c_smbus_write_word_data(client, INA230_CAL,
__constant_cpu_to_be16(data->pdata->calibration_data));
if (retval < 0) {
dev_err(&client->dev, "calibration data write failed sts: 0x%x\n",
retval);
mutex_unlock(&data->mutex);
return INA230_ERROR;
}
retval = ensure_enabled_start(client);
if (retval < 0) {
mutex_unlock(&data->mutex);
return INA230_ERROR;
}
retval = __locked_wait_for_conversion(&client->dev);
if (retval) {
mutex_unlock(&data->mutex);
return INA230_ERROR;
}
/* getting current readings in milli amps*/
retval = i2c_smbus_read_word_data(client, INA230_CURRENT);
if (retval < 0) {
mutex_unlock(&data->mutex);
return INA230_ERROR;
}
current_mA = (s16) be16_to_cpu(retval);
ensure_enabled_end(client);
mutex_unlock(&data->mutex);
if (data->pdata->shunt_polarity_inverted)
current_mA *= -1;
current_mA *= (s16) data->pdata->power_lsb;
if (data->pdata->divisor)
current_mA /= (s16) data->pdata->divisor;
if (data->pdata->precision_multiplier)
current_mA /= (s16) data->pdata->precision_multiplier;
return current_mA;
}
static s32 show_current(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct ina230_data *data = i2c_get_clientdata(client);
s32 current_mA;
int retval;
mutex_lock(&data->mutex);
/* fill calib data */
retval = i2c_smbus_write_word_data(client, INA230_CAL,
__constant_cpu_to_be16(data->pdata->calibration_data));
if (retval < 0) {
dev_err(dev, "calibration data write failed sts: 0x%x\n",
retval);
mutex_unlock(&data->mutex);
return retval;
}
retval = ensure_enabled_start(client);
if (retval < 0) {
mutex_unlock(&data->mutex);
return retval;
}
retval = __locked_wait_for_conversion(dev);
if (retval) {
mutex_unlock(&data->mutex);
return retval;
}
/* getting current readings in milli amps*/
retval = i2c_smbus_read_word_data(client, INA230_CURRENT);
if (retval < 0) {
mutex_unlock(&data->mutex);
return retval;
}
current_mA = (s16) be16_to_cpu(retval);
ensure_enabled_end(client);
mutex_unlock(&data->mutex);
if (data->pdata->shunt_polarity_inverted)
current_mA *= -1;
current_mA *= (s16) data->pdata->power_lsb;
if (data->pdata->divisor)
current_mA /= (s16) data->pdata->divisor;
if (data->pdata->precision_multiplier)
current_mA /= (s16) data->pdata->precision_multiplier;
return sprintf(buf, "%d mA\n", current_mA);
}
static s32 show_power(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct ina230_data *data = i2c_get_clientdata(client);
s32 power_mW;
int retval;
mutex_lock(&data->mutex);
/* fill calib data */
retval = i2c_smbus_write_word_data(client, INA230_CAL,
__constant_cpu_to_be16(data->pdata->calibration_data));
if (retval < 0) {
dev_err(dev, "calibration data write failed sts: 0x%x\n",
retval);
mutex_unlock(&data->mutex);
return retval;
}
retval = ensure_enabled_start(client);
if (retval < 0) {
mutex_unlock(&data->mutex);
return retval;
}
retval = __locked_wait_for_conversion(dev);
if (retval) {
mutex_unlock(&data->mutex);
return retval;
}
/* getting power readings in milli watts*/
power_mW = be16_to_cpu(i2c_smbus_read_word_data(client,
INA230_POWER));
if (power_mW < 0) {
mutex_unlock(&data->mutex);
return -EINVAL;
}
ensure_enabled_end(client);
mutex_unlock(&data->mutex);
power_mW =
power_mW * data->pdata->power_lsb;
if (data->pdata->precision_multiplier)
power_mW /= data->pdata->precision_multiplier;
return sprintf(buf, "%d mW\n", power_mW);
}
s32 ina230_get_bus_voltage_multi(s32 *voltage_mV, u32 num)
{
struct i2c_client *client = to_i2c_client(this_dev);
struct ina230_data *data = i2c_get_clientdata(client);
int retval = 0;
unsigned int i = 0;
if (!voltage_mV || num == 0) {
dev_err(this_dev, "%s: failed with bad parameter (%p, %u)\n", __func__, voltage_mV, num);
retval = -1;
goto fault;
}
mutex_lock(&data->mutex);
i = 0;
do {
retval = ensure_enabled_start(client);
if (retval < 0) {
mutex_unlock(&data->mutex);
goto fault;
}
/* getting voltage readings in milli volts*/
voltage_mV[i] =
(s16)be16_to_cpu(i2c_smbus_read_word_data(client,
INA230_VOLTAGE));
ensure_enabled_end(client);
mdelay(1);
} while (++i < num);
mutex_unlock(&data->mutex);
i = 0;
do {
if (voltage_mV[i] < 0) {
dev_err(this_dev, "%s: failed at %u\n", __func__, i);
retval = -1;
goto fault;
}
voltage_mV[i] = busv_register_to_mv(voltage_mV[i]);
} while (++i < num);
fault:
return retval;
}
s32 ina230_get_batt_voltage_current(s32 *voltage_mV, s32 *current_mA)
{
struct i2c_client *client = to_i2c_client(this_dev);
struct ina230_data *data = i2c_get_clientdata(client);
int retval = 0;
if (!voltage_mV || !current_mA) {
dev_err(this_dev, "%s: failed with bad parameter (%p, %p)\n", __func__, voltage_mV, current_mA);
retval = -1;
goto fault;
}
mutex_lock(&data->mutex);
retval = ensure_enabled_start(client);
if (retval < 0) {
mutex_unlock(&data->mutex);
goto fault;
}
/* getting voltage readings in milli volts*/
*voltage_mV =
(s16)be16_to_cpu(i2c_smbus_read_word_data(client,
INA230_VOLTAGE));
/* getting current readings in milli amps */
*current_mA =
(s16)be16_to_cpu(i2c_smbus_read_word_data(client,
INA230_CURRENT));
ensure_enabled_end(client);
mutex_unlock(&data->mutex);
if (*voltage_mV < 0) {
dev_err(this_dev, "%s: failed\n", __func__);
retval = -1;
goto fault;
}
*voltage_mV = busv_register_to_mv(*voltage_mV);
*current_mA = currenta_register_to_ma(*current_mA);
fault:
return retval;
}
