Merge tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
[cascardo/linux.git] / drivers / iio / imu / inv_mpu6050 / inv_mpu_core.c
index f0e0609..d192953 100644 (file)
@@ -39,6 +39,26 @@ static const int gyro_scale_6050[] = {133090, 266181, 532362, 1064724};
  */
 static const int accel_scale[] = {598, 1196, 2392, 4785};
 
+static const struct inv_mpu6050_reg_map reg_set_6500 = {
+       .sample_rate_div        = INV_MPU6050_REG_SAMPLE_RATE_DIV,
+       .lpf                    = INV_MPU6050_REG_CONFIG,
+       .user_ctrl              = INV_MPU6050_REG_USER_CTRL,
+       .fifo_en                = INV_MPU6050_REG_FIFO_EN,
+       .gyro_config            = INV_MPU6050_REG_GYRO_CONFIG,
+       .accl_config            = INV_MPU6050_REG_ACCEL_CONFIG,
+       .fifo_count_h           = INV_MPU6050_REG_FIFO_COUNT_H,
+       .fifo_r_w               = INV_MPU6050_REG_FIFO_R_W,
+       .raw_gyro               = INV_MPU6050_REG_RAW_GYRO,
+       .raw_accl               = INV_MPU6050_REG_RAW_ACCEL,
+       .temperature            = INV_MPU6050_REG_TEMPERATURE,
+       .int_enable             = INV_MPU6050_REG_INT_ENABLE,
+       .pwr_mgmt_1             = INV_MPU6050_REG_PWR_MGMT_1,
+       .pwr_mgmt_2             = INV_MPU6050_REG_PWR_MGMT_2,
+       .int_pin_cfg            = INV_MPU6050_REG_INT_PIN_CFG,
+       .accl_offset            = INV_MPU6500_REG_ACCEL_OFFSET,
+       .gyro_offset            = INV_MPU6050_REG_GYRO_OFFSET,
+};
+
 static const struct inv_mpu6050_reg_map reg_set_6050 = {
        .sample_rate_div        = INV_MPU6050_REG_SAMPLE_RATE_DIV,
        .lpf                    = INV_MPU6050_REG_CONFIG,
@@ -55,6 +75,8 @@ static const struct inv_mpu6050_reg_map reg_set_6050 = {
        .pwr_mgmt_1             = INV_MPU6050_REG_PWR_MGMT_1,
        .pwr_mgmt_2             = INV_MPU6050_REG_PWR_MGMT_2,
        .int_pin_cfg            = INV_MPU6050_REG_INT_PIN_CFG,
+       .accl_offset            = INV_MPU6050_REG_ACCEL_OFFSET,
+       .gyro_offset            = INV_MPU6050_REG_GYRO_OFFSET,
 };
 
 static const struct inv_mpu6050_chip_config chip_config_6050 = {
@@ -66,7 +88,13 @@ static const struct inv_mpu6050_chip_config chip_config_6050 = {
        .accl_fs = INV_MPU6050_FS_02G,
 };
 
-static const struct inv_mpu6050_hw hw_info[INV_NUM_PARTS] = {
+static const struct inv_mpu6050_hw hw_info[] = {
+       {
+               .num_reg = 117,
+               .name = "MPU6500",
+               .reg = &reg_set_6500,
+               .config = &chip_config_6050,
+       },
        {
                .num_reg = 117,
                .name = "MPU6050",
@@ -75,134 +103,53 @@ static const struct inv_mpu6050_hw hw_info[INV_NUM_PARTS] = {
        },
 };
 
-int inv_mpu6050_write_reg(struct inv_mpu6050_state *st, int reg, u8 d)
-{
-       return i2c_smbus_write_i2c_block_data(st->client, reg, 1, &d);
-}
-
-/*
- * The i2c read/write needs to happen in unlocked mode. As the parent
- * adapter is common. If we use locked versions, it will fail as
- * the mux adapter will lock the parent i2c adapter, while calling
- * select/deselect functions.
- */
-static int inv_mpu6050_write_reg_unlocked(struct inv_mpu6050_state *st,
-                                         u8 reg, u8 d)
-{
-       int ret;
-       u8 buf[2];
-       struct i2c_msg msg[1] = {
-               {
-                       .addr = st->client->addr,
-                       .flags = 0,
-                       .len = sizeof(buf),
-                       .buf = buf,
-               }
-       };
-
-       buf[0] = reg;
-       buf[1] = d;
-       ret = __i2c_transfer(st->client->adapter, msg, 1);
-       if (ret != 1)
-               return ret;
-
-       return 0;
-}
-
-static int inv_mpu6050_select_bypass(struct i2c_adapter *adap, void *mux_priv,
-                                    u32 chan_id)
-{
-       struct iio_dev *indio_dev = mux_priv;
-       struct inv_mpu6050_state *st = iio_priv(indio_dev);
-       int ret = 0;
-
-       /* Use the same mutex which was used everywhere to protect power-op */
-       mutex_lock(&indio_dev->mlock);
-       if (!st->powerup_count) {
-               ret = inv_mpu6050_write_reg_unlocked(st, st->reg->pwr_mgmt_1,
-                                                    0);
-               if (ret)
-                       goto write_error;
-
-               msleep(INV_MPU6050_REG_UP_TIME);
-       }
-       if (!ret) {
-               st->powerup_count++;
-               ret = inv_mpu6050_write_reg_unlocked(st, st->reg->int_pin_cfg,
-                                                    st->client->irq |
-                                                    INV_MPU6050_BIT_BYPASS_EN);
-       }
-write_error:
-       mutex_unlock(&indio_dev->mlock);
-
-       return ret;
-}
-
-static int inv_mpu6050_deselect_bypass(struct i2c_adapter *adap,
-                                      void *mux_priv, u32 chan_id)
-{
-       struct iio_dev *indio_dev = mux_priv;
-       struct inv_mpu6050_state *st = iio_priv(indio_dev);
-
-       mutex_lock(&indio_dev->mlock);
-       /* It doesn't really mattter, if any of the calls fails */
-       inv_mpu6050_write_reg_unlocked(st, st->reg->int_pin_cfg,
-                                      st->client->irq);
-       st->powerup_count--;
-       if (!st->powerup_count)
-               inv_mpu6050_write_reg_unlocked(st, st->reg->pwr_mgmt_1,
-                                              INV_MPU6050_BIT_SLEEP);
-       mutex_unlock(&indio_dev->mlock);
-
-       return 0;
-}
-
 int inv_mpu6050_switch_engine(struct inv_mpu6050_state *st, bool en, u32 mask)
 {
-       u8 d, mgmt_1;
+       unsigned int d, mgmt_1;
        int result;
-
-       /* switch clock needs to be careful. Only when gyro is on, can
-          clock source be switched to gyro. Otherwise, it must be set to
-          internal clock */
-       if (INV_MPU6050_BIT_PWR_GYRO_STBY == mask) {
-               result = i2c_smbus_read_i2c_block_data(st->client,
-                                      st->reg->pwr_mgmt_1, 1, &mgmt_1);
-               if (result != 1)
+       /*
+        * switch clock needs to be careful. Only when gyro is on, can
+        * clock source be switched to gyro. Otherwise, it must be set to
+        * internal clock
+        */
+       if (mask == INV_MPU6050_BIT_PWR_GYRO_STBY) {
+               result = regmap_read(st->map, st->reg->pwr_mgmt_1, &mgmt_1);
+               if (result)
                        return result;
 
                mgmt_1 &= ~INV_MPU6050_BIT_CLK_MASK;
        }
 
-       if ((INV_MPU6050_BIT_PWR_GYRO_STBY == mask) && (!en)) {
-               /* turning off gyro requires switch to internal clock first.
-                  Then turn off gyro engine */
+       if ((mask == INV_MPU6050_BIT_PWR_GYRO_STBY) && (!en)) {
+               /*
+                * turning off gyro requires switch to internal clock first.
+                * Then turn off gyro engine
+                */
                mgmt_1 |= INV_CLK_INTERNAL;
-               result = inv_mpu6050_write_reg(st, st->reg->pwr_mgmt_1, mgmt_1);
+               result = regmap_write(st->map, st->reg->pwr_mgmt_1, mgmt_1);
                if (result)
                        return result;
        }
 
-       result = i2c_smbus_read_i2c_block_data(st->client,
-                                      st->reg->pwr_mgmt_2, 1, &d);
-       if (result != 1)
+       result = regmap_read(st->map, st->reg->pwr_mgmt_2, &d);
+       if (result)
                return result;
        if (en)
                d &= ~mask;
        else
                d |= mask;
-       result = inv_mpu6050_write_reg(st, st->reg->pwr_mgmt_2, d);
+       result = regmap_write(st->map, st->reg->pwr_mgmt_2, d);
        if (result)
                return result;
 
        if (en) {
                /* Wait for output stabilize */
                msleep(INV_MPU6050_TEMP_UP_TIME);
-               if (INV_MPU6050_BIT_PWR_GYRO_STBY == mask) {
+               if (mask == INV_MPU6050_BIT_PWR_GYRO_STBY) {
                        /* switch internal clock to PLL */
                        mgmt_1 |= INV_CLK_PLL;
-                       result = inv_mpu6050_write_reg(st,
-                                       st->reg->pwr_mgmt_1, mgmt_1);
+                       result = regmap_write(st->map,
+                                             st->reg->pwr_mgmt_1, mgmt_1);
                        if (result)
                                return result;
                }
@@ -218,25 +165,26 @@ int inv_mpu6050_set_power_itg(struct inv_mpu6050_state *st, bool power_on)
        if (power_on) {
                /* Already under indio-dev->mlock mutex */
                if (!st->powerup_count)
-                       result = inv_mpu6050_write_reg(st, st->reg->pwr_mgmt_1,
-                                                      0);
+                       result = regmap_write(st->map, st->reg->pwr_mgmt_1, 0);
                if (!result)
                        st->powerup_count++;
        } else {
                st->powerup_count--;
                if (!st->powerup_count)
-                       result = inv_mpu6050_write_reg(st, st->reg->pwr_mgmt_1,
-                                                      INV_MPU6050_BIT_SLEEP);
+                       result = regmap_write(st->map, st->reg->pwr_mgmt_1,
+                                             INV_MPU6050_BIT_SLEEP);
        }
 
        if (result)
                return result;
 
        if (power_on)
-               msleep(INV_MPU6050_REG_UP_TIME);
+               usleep_range(INV_MPU6050_REG_UP_TIME_MIN,
+                            INV_MPU6050_REG_UP_TIME_MAX);
 
        return 0;
 }
+EXPORT_SYMBOL_GPL(inv_mpu6050_set_power_itg);
 
 /**
  *  inv_mpu6050_init_config() - Initialize hardware, disable FIFO.
@@ -257,59 +205,73 @@ static int inv_mpu6050_init_config(struct iio_dev *indio_dev)
        if (result)
                return result;
        d = (INV_MPU6050_FSR_2000DPS << INV_MPU6050_GYRO_CONFIG_FSR_SHIFT);
-       result = inv_mpu6050_write_reg(st, st->reg->gyro_config, d);
+       result = regmap_write(st->map, st->reg->gyro_config, d);
        if (result)
                return result;
 
        d = INV_MPU6050_FILTER_20HZ;
-       result = inv_mpu6050_write_reg(st, st->reg->lpf, d);
+       result = regmap_write(st->map, st->reg->lpf, d);
        if (result)
                return result;
 
        d = INV_MPU6050_ONE_K_HZ / INV_MPU6050_INIT_FIFO_RATE - 1;
-       result = inv_mpu6050_write_reg(st, st->reg->sample_rate_div, d);
+       result = regmap_write(st->map, st->reg->sample_rate_div, d);
        if (result)
                return result;
 
        d = (INV_MPU6050_FS_02G << INV_MPU6050_ACCL_CONFIG_FSR_SHIFT);
-       result = inv_mpu6050_write_reg(st, st->reg->accl_config, d);
+       result = regmap_write(st->map, st->reg->accl_config, d);
        if (result)
                return result;
 
        memcpy(&st->chip_config, hw_info[st->chip_type].config,
-               sizeof(struct inv_mpu6050_chip_config));
+              sizeof(struct inv_mpu6050_chip_config));
        result = inv_mpu6050_set_power_itg(st, false);
 
        return result;
 }
 
+static int inv_mpu6050_sensor_set(struct inv_mpu6050_state  *st, int reg,
+                               int axis, int val)
+{
+       int ind, result;
+       __be16 d = cpu_to_be16(val);
+
+       ind = (axis - IIO_MOD_X) * 2;
+       result = regmap_bulk_write(st->map, reg + ind, (u8 *)&d, 2);
+       if (result)
+               return -EINVAL;
+
+       return 0;
+}
+
 static int inv_mpu6050_sensor_show(struct inv_mpu6050_state  *st, int reg,
-                               int axis, int *val)
+                                  int axis, int *val)
 {
        int ind, result;
        __be16 d;
 
        ind = (axis - IIO_MOD_X) * 2;
-       result = i2c_smbus_read_i2c_block_data(st->client, reg + ind,  2,
-                                               (u8 *)&d);
-       if (result != 2)
+       result = regmap_bulk_read(st->map, reg + ind, (u8 *)&d, 2);
+       if (result)
                return -EINVAL;
        *val = (short)be16_to_cpup(&d);
 
        return IIO_VAL_INT;
 }
 
-static int inv_mpu6050_read_raw(struct iio_dev *indio_dev,
-                             struct iio_chan_spec const *chan,
-                             int *val,
-                             int *val2,
-                             long mask) {
+static int
+inv_mpu6050_read_raw(struct iio_dev *indio_dev,
+                    struct iio_chan_spec const *chan,
+                    int *val, int *val2, long mask)
+{
        struct inv_mpu6050_state  *st = iio_priv(indio_dev);
+       int ret = 0;
 
        switch (mask) {
        case IIO_CHAN_INFO_RAW:
        {
-               int ret, result;
+               int result;
 
                ret = IIO_VAL_INT;
                result = 0;
@@ -323,16 +285,16 @@ static int inv_mpu6050_read_raw(struct iio_dev *indio_dev,
                switch (chan->type) {
                case IIO_ANGL_VEL:
                        if (!st->chip_config.gyro_fifo_enable ||
-                                       !st->chip_config.enable) {
+                           !st->chip_config.enable) {
                                result = inv_mpu6050_switch_engine(st, true,
                                                INV_MPU6050_BIT_PWR_GYRO_STBY);
                                if (result)
                                        goto error_read_raw;
                        }
-                       ret =  inv_mpu6050_sensor_show(st, st->reg->raw_gyro,
-                                               chan->channel2, val);
+                       ret = inv_mpu6050_sensor_show(st, st->reg->raw_gyro,
+                                                     chan->channel2, val);
                        if (!st->chip_config.gyro_fifo_enable ||
-                                       !st->chip_config.enable) {
+                           !st->chip_config.enable) {
                                result = inv_mpu6050_switch_engine(st, false,
                                                INV_MPU6050_BIT_PWR_GYRO_STBY);
                                if (result)
@@ -341,16 +303,16 @@ static int inv_mpu6050_read_raw(struct iio_dev *indio_dev,
                        break;
                case IIO_ACCEL:
                        if (!st->chip_config.accl_fifo_enable ||
-                                       !st->chip_config.enable) {
+                           !st->chip_config.enable) {
                                result = inv_mpu6050_switch_engine(st, true,
                                                INV_MPU6050_BIT_PWR_ACCL_STBY);
                                if (result)
                                        goto error_read_raw;
                        }
                        ret = inv_mpu6050_sensor_show(st, st->reg->raw_accl,
-                                               chan->channel2, val);
+                                                     chan->channel2, val);
                        if (!st->chip_config.accl_fifo_enable ||
-                                       !st->chip_config.enable) {
+                           !st->chip_config.enable) {
                                result = inv_mpu6050_switch_engine(st, false,
                                                INV_MPU6050_BIT_PWR_ACCL_STBY);
                                if (result)
@@ -360,8 +322,8 @@ static int inv_mpu6050_read_raw(struct iio_dev *indio_dev,
                case IIO_TEMP:
                        /* wait for stablization */
                        msleep(INV_MPU6050_SENSOR_UP_TIME);
-                       inv_mpu6050_sensor_show(st, st->reg->temperature,
-                                                       IIO_MOD_X, val);
+                       ret = inv_mpu6050_sensor_show(st, st->reg->temperature,
+                                               IIO_MOD_X, val);
                        break;
                default:
                        ret = -EINVAL;
@@ -405,6 +367,20 @@ error_read_raw:
                default:
                        return -EINVAL;
                }
+       case IIO_CHAN_INFO_CALIBBIAS:
+               switch (chan->type) {
+               case IIO_ANGL_VEL:
+                       ret = inv_mpu6050_sensor_show(st, st->reg->gyro_offset,
+                                               chan->channel2, val);
+                       return IIO_VAL_INT;
+               case IIO_ACCEL:
+                       ret = inv_mpu6050_sensor_show(st, st->reg->accl_offset,
+                                               chan->channel2, val);
+                       return IIO_VAL_INT;
+
+               default:
+                       return -EINVAL;
+               }
        default:
                return -EINVAL;
        }
@@ -418,8 +394,7 @@ static int inv_mpu6050_write_gyro_scale(struct inv_mpu6050_state *st, int val)
        for (i = 0; i < ARRAY_SIZE(gyro_scale_6050); ++i) {
                if (gyro_scale_6050[i] == val) {
                        d = (i << INV_MPU6050_GYRO_CONFIG_FSR_SHIFT);
-                       result = inv_mpu6050_write_reg(st,
-                                       st->reg->gyro_config, d);
+                       result = regmap_write(st->map, st->reg->gyro_config, d);
                        if (result)
                                return result;
 
@@ -448,6 +423,7 @@ static int inv_write_raw_get_fmt(struct iio_dev *indio_dev,
 
        return -EINVAL;
 }
+
 static int inv_mpu6050_write_accel_scale(struct inv_mpu6050_state *st, int val)
 {
        int result, i;
@@ -456,8 +432,7 @@ static int inv_mpu6050_write_accel_scale(struct inv_mpu6050_state *st, int val)
        for (i = 0; i < ARRAY_SIZE(accel_scale); ++i) {
                if (accel_scale[i] == val) {
                        d = (i << INV_MPU6050_ACCL_CONFIG_FSR_SHIFT);
-                       result = inv_mpu6050_write_reg(st,
-                                       st->reg->accl_config, d);
+                       result = regmap_write(st->map, st->reg->accl_config, d);
                        if (result)
                                return result;
 
@@ -470,16 +445,17 @@ static int inv_mpu6050_write_accel_scale(struct inv_mpu6050_state *st, int val)
 }
 
 static int inv_mpu6050_write_raw(struct iio_dev *indio_dev,
-                              struct iio_chan_spec const *chan,
-                              int val,
-                              int val2,
-                              long mask) {
+                                struct iio_chan_spec const *chan,
+                                int val, int val2, long mask)
+{
        struct inv_mpu6050_state  *st = iio_priv(indio_dev);
        int result;
 
        mutex_lock(&indio_dev->mlock);
-       /* we should only update scale when the chip is disabled, i.e.,
-               not running */
+       /*
+        * we should only update scale when the chip is disabled, i.e.
+        * not running
+        */
        if (st->chip_config.enable) {
                result = -EBUSY;
                goto error_write_raw;
@@ -502,6 +478,21 @@ static int inv_mpu6050_write_raw(struct iio_dev *indio_dev,
                        break;
                }
                break;
+       case IIO_CHAN_INFO_CALIBBIAS:
+               switch (chan->type) {
+               case IIO_ANGL_VEL:
+                       result = inv_mpu6050_sensor_set(st,
+                                                       st->reg->gyro_offset,
+                                                       chan->channel2, val);
+                       break;
+               case IIO_ACCEL:
+                       result = inv_mpu6050_sensor_set(st,
+                                                       st->reg->accl_offset,
+                                                       chan->channel2, val);
+                       break;
+               default:
+                       result = -EINVAL;
+               }
        default:
                result = -EINVAL;
                break;
@@ -537,7 +528,7 @@ static int inv_mpu6050_set_lpf(struct inv_mpu6050_state *st, int rate)
        while ((h < hz[i]) && (i < ARRAY_SIZE(d) - 1))
                i++;
        data = d[i];
-       result = inv_mpu6050_write_reg(st, st->reg->lpf, data);
+       result = regmap_write(st->map, st->reg->lpf, data);
        if (result)
                return result;
        st->chip_config.lpf = data;
@@ -548,8 +539,9 @@ static int inv_mpu6050_set_lpf(struct inv_mpu6050_state *st, int rate)
 /**
  * inv_mpu6050_fifo_rate_store() - Set fifo rate.
  */
-static ssize_t inv_mpu6050_fifo_rate_store(struct device *dev,
-       struct device_attribute *attr, const char *buf, size_t count)
+static ssize_t
+inv_mpu6050_fifo_rate_store(struct device *dev, struct device_attribute *attr,
+                           const char *buf, size_t count)
 {
        s32 fifo_rate;
        u8 d;
@@ -560,7 +552,7 @@ static ssize_t inv_mpu6050_fifo_rate_store(struct device *dev,
        if (kstrtoint(buf, 10, &fifo_rate))
                return -EINVAL;
        if (fifo_rate < INV_MPU6050_MIN_FIFO_RATE ||
-                               fifo_rate > INV_MPU6050_MAX_FIFO_RATE)
+           fifo_rate > INV_MPU6050_MAX_FIFO_RATE)
                return -EINVAL;
        if (fifo_rate == st->chip_config.fifo_rate)
                return count;
@@ -575,7 +567,7 @@ static ssize_t inv_mpu6050_fifo_rate_store(struct device *dev,
                goto fifo_rate_fail;
 
        d = INV_MPU6050_ONE_K_HZ / fifo_rate - 1;
-       result = inv_mpu6050_write_reg(st, st->reg->sample_rate_div, d);
+       result = regmap_write(st->map, st->reg->sample_rate_div, d);
        if (result)
                goto fifo_rate_fail;
        st->chip_config.fifo_rate = fifo_rate;
@@ -596,8 +588,9 @@ fifo_rate_fail:
 /**
  * inv_fifo_rate_show() - Get the current sampling rate.
  */
-static ssize_t inv_fifo_rate_show(struct device *dev,
-       struct device_attribute *attr, char *buf)
+static ssize_t
+inv_fifo_rate_show(struct device *dev, struct device_attribute *attr,
+                  char *buf)
 {
        struct inv_mpu6050_state *st = iio_priv(dev_to_iio_dev(dev));
 
@@ -608,16 +601,18 @@ static ssize_t inv_fifo_rate_show(struct device *dev,
  * inv_attr_show() - calling this function will show current
  *                    parameters.
  */
-static ssize_t inv_attr_show(struct device *dev,
-       struct device_attribute *attr, char *buf)
+static ssize_t inv_attr_show(struct device *dev, struct device_attribute *attr,
+                            char *buf)
 {
        struct inv_mpu6050_state *st = iio_priv(dev_to_iio_dev(dev));
        struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
        s8 *m;
 
        switch (this_attr->address) {
-       /* In MPU6050, the two matrix are the same because gyro and accel
-          are integrated in one chip */
+       /*
+        * In MPU6050, the two matrix are the same because gyro and accel
+        * are integrated in one chip
+        */
        case ATTR_GYRO_MATRIX:
        case ATTR_ACCL_MATRIX:
                m = st->plat_data.orientation;
@@ -654,14 +649,15 @@ static int inv_mpu6050_validate_trigger(struct iio_dev *indio_dev,
                .type = _type,                                        \
                .modified = 1,                                        \
                .channel2 = _channel2,                                \
-               .info_mask_shared_by_type =  BIT(IIO_CHAN_INFO_SCALE), \
-               .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),         \
+               .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
+               .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |        \
+                                     BIT(IIO_CHAN_INFO_CALIBBIAS),   \
                .scan_index = _index,                                 \
                .scan_type = {                                        \
                                .sign = 's',                          \
                                .realbits = 16,                       \
                                .storagebits = 16,                    \
-                               .shift = 0 ,                          \
+                               .shift = 0                          \
                                .endianness = IIO_BE,                 \
                             },                                       \
        }
@@ -674,7 +670,7 @@ static const struct iio_chan_spec inv_mpu_channels[] = {
         */
        {
                .type = IIO_TEMP,
-               .info_mask_separate =  BIT(IIO_CHAN_INFO_RAW)
+               .info_mask_separate = BIT(IIO_CHAN_INFO_RAW)
                                | BIT(IIO_CHAN_INFO_OFFSET)
                                | BIT(IIO_CHAN_INFO_SCALE),
                .scan_index = -1,
@@ -727,25 +723,25 @@ static const struct iio_info mpu_info = {
 /**
  *  inv_check_and_setup_chip() - check and setup chip.
  */
-static int inv_check_and_setup_chip(struct inv_mpu6050_state *st,
-               const struct i2c_device_id *id)
+static int inv_check_and_setup_chip(struct inv_mpu6050_state *st)
 {
        int result;
 
-       st->chip_type = INV_MPU6050;
        st->hw  = &hw_info[st->chip_type];
        st->reg = hw_info[st->chip_type].reg;
 
        /* reset to make sure previous state are not there */
-       result = inv_mpu6050_write_reg(st, st->reg->pwr_mgmt_1,
-                                       INV_MPU6050_BIT_H_RESET);
+       result = regmap_write(st->map, st->reg->pwr_mgmt_1,
+                             INV_MPU6050_BIT_H_RESET);
        if (result)
                return result;
        msleep(INV_MPU6050_POWER_UP_TIME);
-       /* toggle power state. After reset, the sleep bit could be on
-               or off depending on the OTP settings. Toggling power would
-               make it in a definite state as well as making the hardware
-               state align with the software state */
+       /*
+        * toggle power state. After reset, the sleep bit could be on
+        * or off depending on the OTP settings. Toggling power would
+        * make it in a definite state as well as making the hardware
+        * state align with the software state
+        */
        result = inv_mpu6050_set_power_itg(st, false);
        if (result)
                return result;
@@ -754,65 +750,59 @@ static int inv_check_and_setup_chip(struct inv_mpu6050_state *st,
                return result;
 
        result = inv_mpu6050_switch_engine(st, false,
-                                       INV_MPU6050_BIT_PWR_ACCL_STBY);
+                                          INV_MPU6050_BIT_PWR_ACCL_STBY);
        if (result)
                return result;
        result = inv_mpu6050_switch_engine(st, false,
-                                       INV_MPU6050_BIT_PWR_GYRO_STBY);
+                                          INV_MPU6050_BIT_PWR_GYRO_STBY);
        if (result)
                return result;
 
        return 0;
 }
 
-/**
- *  inv_mpu_probe() - probe function.
- *  @client:          i2c client.
- *  @id:              i2c device id.
- *
- *  Returns 0 on success, a negative error code otherwise.
- */
-static int inv_mpu_probe(struct i2c_client *client,
-       const struct i2c_device_id *id)
+int inv_mpu_core_probe(struct regmap *regmap, int irq, const char *name,
+               int (*inv_mpu_bus_setup)(struct iio_dev *), int chip_type)
 {
        struct inv_mpu6050_state *st;
        struct iio_dev *indio_dev;
        struct inv_mpu6050_platform_data *pdata;
+       struct device *dev = regmap_get_device(regmap);
        int result;
 
-       if (!i2c_check_functionality(client->adapter,
-               I2C_FUNC_SMBUS_I2C_BLOCK))
-               return -ENOSYS;
-
-       indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*st));
+       indio_dev = devm_iio_device_alloc(dev, sizeof(*st));
        if (!indio_dev)
                return -ENOMEM;
 
        st = iio_priv(indio_dev);
-       st->client = client;
+       st->chip_type = chip_type;
        st->powerup_count = 0;
-       pdata = dev_get_platdata(&client->dev);
+       st->irq = irq;
+       st->map = regmap;
+       pdata = dev_get_platdata(dev);
        if (pdata)
                st->plat_data = *pdata;
        /* power is turned on inside check chip type*/
-       result = inv_check_and_setup_chip(st, id);
+       result = inv_check_and_setup_chip(st);
        if (result)
                return result;
 
+       if (inv_mpu_bus_setup)
+               inv_mpu_bus_setup(indio_dev);
+
        result = inv_mpu6050_init_config(indio_dev);
        if (result) {
-               dev_err(&client->dev,
-                       "Could not initialize device.\n");
+               dev_err(dev, "Could not initialize device.\n");
                return result;
        }
 
-       i2c_set_clientdata(client, indio_dev);
-       indio_dev->dev.parent = &client->dev;
-       /* id will be NULL when enumerated via ACPI */
-       if (id)
-               indio_dev->name = (char *)id->name;
+       dev_set_drvdata(dev, indio_dev);
+       indio_dev->dev.parent = dev;
+       /* name will be NULL when enumerated via ACPI */
+       if (name)
+               indio_dev->name = name;
        else
-               indio_dev->name = (char *)dev_name(&client->dev);
+               indio_dev->name = dev_name(dev);
        indio_dev->channels = inv_mpu_channels;
        indio_dev->num_channels = ARRAY_SIZE(inv_mpu_channels);
 
@@ -824,13 +814,12 @@ static int inv_mpu_probe(struct i2c_client *client,
                                            inv_mpu6050_read_fifo,
                                            NULL);
        if (result) {
-               dev_err(&st->client->dev, "configure buffer fail %d\n",
-                               result);
+               dev_err(dev, "configure buffer fail %d\n", result);
                return result;
        }
        result = inv_mpu6050_probe_trigger(indio_dev);
        if (result) {
-               dev_err(&st->client->dev, "trigger probe fail %d\n", result);
+               dev_err(dev, "trigger probe fail %d\n", result);
                goto out_unreg_ring;
        }
 
@@ -838,102 +827,47 @@ static int inv_mpu_probe(struct i2c_client *client,
        spin_lock_init(&st->time_stamp_lock);
        result = iio_device_register(indio_dev);
        if (result) {
-               dev_err(&st->client->dev, "IIO register fail %d\n", result);
+               dev_err(dev, "IIO register fail %d\n", result);
                goto out_remove_trigger;
        }
 
-       st->mux_adapter = i2c_add_mux_adapter(client->adapter,
-                                             &client->dev,
-                                             indio_dev,
-                                             0, 0, 0,
-                                             inv_mpu6050_select_bypass,
-                                             inv_mpu6050_deselect_bypass);
-       if (!st->mux_adapter) {
-               result = -ENODEV;
-               goto out_unreg_device;
-       }
-
-       result = inv_mpu_acpi_create_mux_client(st);
-       if (result)
-               goto out_del_mux;
-
        return 0;
 
-out_del_mux:
-       i2c_del_mux_adapter(st->mux_adapter);
-out_unreg_device:
-       iio_device_unregister(indio_dev);
 out_remove_trigger:
        inv_mpu6050_remove_trigger(st);
 out_unreg_ring:
        iio_triggered_buffer_cleanup(indio_dev);
        return result;
 }
+EXPORT_SYMBOL_GPL(inv_mpu_core_probe);
 
-static int inv_mpu_remove(struct i2c_client *client)
+int inv_mpu_core_remove(struct device  *dev)
 {
-       struct iio_dev *indio_dev = i2c_get_clientdata(client);
-       struct inv_mpu6050_state *st = iio_priv(indio_dev);
+       struct iio_dev *indio_dev = dev_get_drvdata(dev);
 
-       inv_mpu_acpi_delete_mux_client(st);
-       i2c_del_mux_adapter(st->mux_adapter);
        iio_device_unregister(indio_dev);
-       inv_mpu6050_remove_trigger(st);
+       inv_mpu6050_remove_trigger(iio_priv(indio_dev));
        iio_triggered_buffer_cleanup(indio_dev);
 
        return 0;
 }
+EXPORT_SYMBOL_GPL(inv_mpu_core_remove);
+
 #ifdef CONFIG_PM_SLEEP
 
 static int inv_mpu_resume(struct device *dev)
 {
-       return inv_mpu6050_set_power_itg(
-               iio_priv(i2c_get_clientdata(to_i2c_client(dev))), true);
+       return inv_mpu6050_set_power_itg(iio_priv(dev_get_drvdata(dev)), true);
 }
 
 static int inv_mpu_suspend(struct device *dev)
 {
-       return inv_mpu6050_set_power_itg(
-               iio_priv(i2c_get_clientdata(to_i2c_client(dev))), false);
+       return inv_mpu6050_set_power_itg(iio_priv(dev_get_drvdata(dev)), false);
 }
-static SIMPLE_DEV_PM_OPS(inv_mpu_pmops, inv_mpu_suspend, inv_mpu_resume);
-
-#define INV_MPU6050_PMOPS (&inv_mpu_pmops)
-#else
-#define INV_MPU6050_PMOPS NULL
 #endif /* CONFIG_PM_SLEEP */
 
-/*
- * device id table is used to identify what device can be
- * supported by this driver
- */
-static const struct i2c_device_id inv_mpu_id[] = {
-       {"mpu6050", INV_MPU6050},
-       {"mpu6500", INV_MPU6500},
-       {}
-};
-
-MODULE_DEVICE_TABLE(i2c, inv_mpu_id);
-
-static const struct acpi_device_id inv_acpi_match[] = {
-       {"INVN6500", 0},
-       { },
-};
-
-MODULE_DEVICE_TABLE(acpi, inv_acpi_match);
-
-static struct i2c_driver inv_mpu_driver = {
-       .probe          =       inv_mpu_probe,
-       .remove         =       inv_mpu_remove,
-       .id_table       =       inv_mpu_id,
-       .driver = {
-               .name   =       "inv-mpu6050",
-               .pm     =       INV_MPU6050_PMOPS,
-               .acpi_match_table = ACPI_PTR(inv_acpi_match),
-       },
-};
-
-module_i2c_driver(inv_mpu_driver);
+SIMPLE_DEV_PM_OPS(inv_mpu_pmops, inv_mpu_suspend, inv_mpu_resume);
+EXPORT_SYMBOL_GPL(inv_mpu_pmops);
 
 MODULE_AUTHOR("Invensense Corporation");
 MODULE_DESCRIPTION("Invensense device MPU6050 driver");