diff options
Diffstat (limited to 'drivers/iio/accel')
| -rw-r--r-- | drivers/iio/accel/kxcjk-1013.c | 100 |
1 files changed, 95 insertions, 5 deletions
diff --git a/drivers/iio/accel/kxcjk-1013.c b/drivers/iio/accel/kxcjk-1013.c index b32bdd10e0c..57c515bf0fd 100644 --- a/drivers/iio/accel/kxcjk-1013.c +++ b/drivers/iio/accel/kxcjk-1013.c @@ -82,6 +82,7 @@ struct kxcjk1013_data { struct mutex mutex; s16 buffer[8]; u8 odr_bits; + u8 range; bool active_high_intr; bool trigger_on; }; @@ -97,6 +98,12 @@ enum kxcjk1013_mode { OPERATION, }; +enum kxcjk1013_range { + KXCJK1013_RANGE_2G, + KXCJK1013_RANGE_4G, + KXCJK1013_RANGE_8G, +}; + static const struct { int val; int val2; @@ -116,6 +123,14 @@ static const struct { {0x02, 21000}, {0x03, 11000}, {0x04, 6400}, {0x05, 3900}, {0x06, 2700}, {0x07, 2100} }; +static const struct { + u16 scale; + u8 gsel_0; + u8 gsel_1; +} KXCJK1013_scale_table[] = { {9582, 0, 0}, + {19163, 1, 0}, + {38326, 0, 1} }; + static int kxcjk1013_set_mode(struct kxcjk1013_data *data, enum kxcjk1013_mode mode) { @@ -161,6 +176,32 @@ static int kxcjk1013_get_mode(struct kxcjk1013_data *data, return 0; } +static int kxcjk1013_set_range(struct kxcjk1013_data *data, int range_index) +{ + int ret; + + ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1); + if (ret < 0) { + dev_err(&data->client->dev, "Error reading reg_ctrl1\n"); + return ret; + } + + ret |= (KXCJK1013_scale_table[range_index].gsel_0 << 3); + ret |= (KXCJK1013_scale_table[range_index].gsel_1 << 4); + + ret = i2c_smbus_write_byte_data(data->client, + KXCJK1013_REG_CTRL1, + ret); + if (ret < 0) { + dev_err(&data->client->dev, "Error writing reg_ctrl1\n"); + return ret; + } + + data->range = range_index; + + return 0; +} + static int kxcjk1013_chip_init(struct kxcjk1013_data *data) { int ret; @@ -183,10 +224,6 @@ static int kxcjk1013_chip_init(struct kxcjk1013_data *data) return ret; } - /* Setting range to 4G */ - ret |= KXCJK1013_REG_CTRL1_BIT_GSEL0; - ret &= ~KXCJK1013_REG_CTRL1_BIT_GSEL1; - /* Set 12 bit mode */ ret |= KXCJK1013_REG_CTRL1_BIT_RES; @@ -197,6 +234,14 @@ static int kxcjk1013_chip_init(struct kxcjk1013_data *data) return ret; } + /* Setting range to 4G */ + ret = kxcjk1013_set_range(data, KXCJK1013_RANGE_4G); + if (ret < 0) + return ret; + + data->range = KXCJK1013_RANGE_4G; + + ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_DATA_CTRL); if (ret < 0) { dev_err(&data->client->dev, "Error reading reg_data_ctrl\n"); @@ -403,6 +448,40 @@ static int kxcjk1013_get_acc_reg(struct kxcjk1013_data *data, int axis) return ret; } +static int kxcjk1013_set_scale(struct kxcjk1013_data *data, int val) +{ + int ret, i; + enum kxcjk1013_mode store_mode; + + + for (i = 0; i < ARRAY_SIZE(KXCJK1013_scale_table); ++i) { + if (KXCJK1013_scale_table[i].scale == val) { + + ret = kxcjk1013_get_mode(data, &store_mode); + if (ret < 0) + return ret; + + ret = kxcjk1013_set_mode(data, STANDBY); + if (ret < 0) + return ret; + + ret = kxcjk1013_set_range(data, i); + if (ret < 0) + return ret; + + if (store_mode == OPERATION) { + ret = kxcjk1013_set_mode(data, OPERATION); + if (ret) + return ret; + } + + return 0; + } + } + + return -EINVAL; +} + static int kxcjk1013_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) @@ -439,7 +518,7 @@ static int kxcjk1013_read_raw(struct iio_dev *indio_dev, case IIO_CHAN_INFO_SCALE: *val = 0; - *val2 = 19163; /* range +-4g (4/2047*9.806650) */ + *val2 = KXCJK1013_scale_table[data->range].scale; return IIO_VAL_INT_PLUS_MICRO; case IIO_CHAN_INFO_SAMP_FREQ: @@ -466,6 +545,14 @@ static int kxcjk1013_write_raw(struct iio_dev *indio_dev, ret = kxcjk1013_set_odr(data, val, val2); mutex_unlock(&data->mutex); break; + case IIO_CHAN_INFO_SCALE: + if (val) + return -EINVAL; + + mutex_lock(&data->mutex); + ret = kxcjk1013_set_scale(data, val2); + mutex_unlock(&data->mutex); + break; default: ret = -EINVAL; } @@ -487,8 +574,11 @@ static int kxcjk1013_validate_trigger(struct iio_dev *indio_dev, static IIO_CONST_ATTR_SAMP_FREQ_AVAIL( "0.781000 1.563000 3.125000 6.250000 12.500000 25 50 100 200 400 800 1600"); +static IIO_CONST_ATTR(in_accel_scale_available, "0.009582 0.019163 0.038326"); + static struct attribute *kxcjk1013_attributes[] = { &iio_const_attr_sampling_frequency_available.dev_attr.attr, + &iio_const_attr_in_accel_scale_available.dev_attr.attr, NULL, }; |