ak8974
ret = ak8974_configure(ak8974);
ak8974_set_power(ak8974, AK8974_PWR_OFF);
regulator_bulk_disable(ARRAY_SIZE(ak8974->regs), ak8974->regs);
static int ak8974_get_u16_val(struct ak8974 *ak8974, u8 reg, u16 *val)
ret = regmap_bulk_read(ak8974->map, reg, &bulk, 2);
static int ak8974_set_u16_val(struct ak8974 *ak8974, u8 reg, u16 val)
return regmap_bulk_write(ak8974->map, reg, &bulk, 2);
static int ak8974_set_power(struct ak8974 *ak8974, bool mode)
ret = regmap_write(ak8974->map, AK8974_CTRL1, val);
static int ak8974_reset(struct ak8974 *ak8974)
ret = ak8974_set_power(ak8974, AK8974_PWR_ON);
ret = regmap_write(ak8974->map, AK8974_CTRL2, AK8974_CTRL2_RESDEF);
ret = regmap_write(ak8974->map, AK8974_CTRL3, AK8974_CTRL3_RESDEF);
if (ak8974->variant != AK8974_WHOAMI_VALUE_HSCDTD008A) {
ret = regmap_write(ak8974->map, AK8974_INT_CTRL,
ret = regmap_write(ak8974->map, HSCDTD008A_CTRL4,
return ak8974_set_power(ak8974, AK8974_PWR_OFF);
static int ak8974_configure(struct ak8974 *ak8974)
ret = regmap_write(ak8974->map, AK8974_CTRL2, AK8974_CTRL2_DRDY_EN |
ret = regmap_write(ak8974->map, AK8974_CTRL3, 0);
if (ak8974->variant == AK8974_WHOAMI_VALUE_AMI306) {
ret = ak8974_set_u16_val(ak8974, AMI306_CTRL4, 0xA07E);
if (ak8974->variant == AK8974_WHOAMI_VALUE_HSCDTD008A)
ret = regmap_write(ak8974->map, AK8974_INT_CTRL, AK8974_INT_CTRL_POL);
return regmap_write(ak8974->map, AK8974_PRESET, 0);
static int ak8974_trigmeas(struct ak8974 *ak8974)
ret = regmap_read(ak8974->map, AK8974_INT_CLEAR, &clear);
if (ak8974->drdy_irq) {
if (!ak8974->drdy_active_low)
init_completion(&ak8974->drdy_complete);
ret = regmap_update_bits(ak8974->map, AK8974_CTRL2,
return regmap_set_bits(ak8974->map, AK8974_CTRL3, AK8974_CTRL3_FORCE);
static int ak8974_await_drdy(struct ak8974 *ak8974)
if (ak8974->drdy_irq) {
ret = wait_for_completion_timeout(&ak8974->drdy_complete,
dev_err(&ak8974->i2c->dev,
ret = regmap_read(ak8974->map, AK8974_STATUS, &val);
dev_err(&ak8974->i2c->dev, "timeout waiting for DRDY\n");
static int ak8974_getresult(struct ak8974 *ak8974, __le16 *result)
ret = ak8974_await_drdy(ak8974);
ret = regmap_read(ak8974->map, AK8974_INT_SRC, &src);
dev_err(&ak8974->i2c->dev,
ret = regmap_bulk_read(ak8974->map, AK8974_DATA_X, result, 6);
struct ak8974 *ak8974 = d;
if (!ak8974->drdy_irq)
struct ak8974 *ak8974 = d;
ret = regmap_read(ak8974->map, AK8974_STATUS, &val);
dev_err(&ak8974->i2c->dev, "error reading DRDY status\n");
complete(&ak8974->drdy_complete);
static int ak8974_selftest(struct ak8974 *ak8974)
struct device *dev = &ak8974->i2c->dev;
ret = regmap_read(ak8974->map, AK8974_SELFTEST, &val);
ret = regmap_set_bits(ak8974->map, AK8974_CTRL3, AK8974_CTRL3_SELFTEST);
ret = regmap_read(ak8974->map, AK8974_SELFTEST, &val);
ret = regmap_read(ak8974->map, AK8974_SELFTEST, &val);
static void ak8974_read_calib_data(struct ak8974 *ak8974, unsigned int reg,
int ret = regmap_bulk_read(ak8974->map, reg, tab, tab_size);
dev_warn(&ak8974->i2c->dev,
static int ak8974_detect(struct ak8974 *ak8974)
ret = regmap_read(ak8974->map, AK8974_WHOAMI, &whoami);
ret = regmap_read(ak8974->map, AMI305_VER, &fw);
ret = ak8974_get_u16_val(ak8974, AMI305_SN, &sn);
dev_info(&ak8974->i2c->dev,
dev_info(&ak8974->i2c->dev, "detected AK8974\n");
dev_info(&ak8974->i2c->dev, "detected hscdtd008a\n");
dev_err(&ak8974->i2c->dev, "unsupported device (%02x) ",
ak8974->name = name;
ak8974->variant = whoami;
ak8974_read_calib_data(ak8974, AMI306_FINEOUTPUT_X,
ak8974_read_calib_data(ak8974, AMI306_OFFZERO_X,
dev_info(&ak8974->i2c->dev,
static int ak8974_measure_channel(struct ak8974 *ak8974, unsigned long address,
pm_runtime_get_sync(&ak8974->i2c->dev);
mutex_lock(&ak8974->lock);
ret = ak8974_trigmeas(ak8974);
ret = ak8974_getresult(ak8974, hw_values);
mutex_unlock(&ak8974->lock);
pm_runtime_put_autosuspend(&ak8974->i2c->dev);
struct ak8974 *ak8974 = iio_priv(indio_dev);
dev_err(&ak8974->i2c->dev, "faulty channel address\n");
ret = ak8974_measure_channel(ak8974, chan->address, val);
switch (ak8974->variant) {
struct ak8974 *ak8974 = iio_priv(indio_dev);
pm_runtime_get_sync(&ak8974->i2c->dev);
mutex_lock(&ak8974->lock);
ret = ak8974_trigmeas(ak8974);
dev_err(&ak8974->i2c->dev, "error triggering measure\n");
ret = ak8974_getresult(ak8974, ak8974->scan.channels);
dev_err(&ak8974->i2c->dev, "error getting measures\n");
iio_push_to_buffers_with_ts(indio_dev, &ak8974->scan, sizeof(ak8974->scan),
mutex_unlock(&ak8974->lock);
pm_runtime_put_autosuspend(&ak8974->i2c->dev);
struct ak8974 *ak8974 = iio_priv(indio_dev);
return &ak8974->orientation;
struct ak8974 *ak8974 = iio_priv(indio_dev);
return ak8974->variant != AK8974_WHOAMI_VALUE_HSCDTD008A;
return ak8974->variant == AK8974_WHOAMI_VALUE_AK8974 ||
ak8974->variant == AK8974_WHOAMI_VALUE_HSCDTD008A;
return ak8974->variant == AK8974_WHOAMI_VALUE_AMI305 ||
ak8974->variant == AK8974_WHOAMI_VALUE_AMI306;
return ak8974->variant == AK8974_WHOAMI_VALUE_AMI306;
struct ak8974 *ak8974;
indio_dev = devm_iio_device_alloc(&i2c->dev, sizeof(*ak8974));
ak8974 = iio_priv(indio_dev);
ak8974->i2c = i2c;
mutex_init(&ak8974->lock);
ret = iio_read_mount_matrix(&i2c->dev, &ak8974->orientation);
ak8974->regs[0].supply = ak8974_reg_avdd;
ak8974->regs[1].supply = ak8974_reg_dvdd;
ARRAY_SIZE(ak8974->regs),
ak8974->regs);
ret = regulator_bulk_enable(ARRAY_SIZE(ak8974->regs), ak8974->regs);
ak8974->map = devm_regmap_init_i2c(i2c, &ak8974_regmap_config);
if (IS_ERR(ak8974->map)) {
return PTR_ERR(ak8974->map);
ret = ak8974_set_power(ak8974, AK8974_PWR_ON);
ret = ak8974_detect(ak8974);
ret = ak8974_selftest(ak8974);
ret = ak8974_reset(ak8974);
switch (ak8974->variant) {
indio_dev->name = ak8974->name;
ak8974->drdy_active_low = true;
ak8974->name,
ak8974);
ak8974->drdy_irq = true;
ak8974_set_power(ak8974, AK8974_PWR_OFF);
regulator_bulk_disable(ARRAY_SIZE(ak8974->regs), ak8974->regs);
struct ak8974 *ak8974 = iio_priv(indio_dev);
ak8974_set_power(ak8974, AK8974_PWR_OFF);
regulator_bulk_disable(ARRAY_SIZE(ak8974->regs), ak8974->regs);
struct ak8974 *ak8974 =
ak8974_set_power(ak8974, AK8974_PWR_OFF);
regulator_bulk_disable(ARRAY_SIZE(ak8974->regs), ak8974->regs);
struct ak8974 *ak8974 =
ret = regulator_bulk_enable(ARRAY_SIZE(ak8974->regs), ak8974->regs);
ret = ak8974_set_power(ak8974, AK8974_PWR_ON);