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iio: mma8452: add support for MMA8451Q
This adds support for this series' 14 bit accelerometer chip, MMA8451Q. It's datasheet is available at the vendor's website: https://cache.freescale.com/files/sensors/doc/data_sheet/MMA8451Q.pdf Signed-off-by: Martin Kepplinger <martin.kepplinger@theobroma-systems.com> Signed-off-by: Christoph Muellner <christoph.muellner@theobroma-systems.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
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3 changed files with 41 additions and 9 deletions
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@ -1,8 +1,10 @@
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Freescale MMA8452Q, MMA8453Q, MMA8652FC or MMA8653FC triaxial accelerometer
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Freescale MMA8451Q, MMA8452Q, MMA8453Q, MMA8652FC or MMA8653FC
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triaxial accelerometer
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Required properties:
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- compatible: should contain one of
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* "fsl,mma8451"
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* "fsl,mma8452"
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* "fsl,mma8453"
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* "fsl,mma8652"
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@ -143,7 +143,7 @@ config MMA8452
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select IIO_TRIGGERED_BUFFER
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help
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Say yes here to build support for the following Freescale 3-axis
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accelerometers: MMA8452Q, MMA8453Q, MMA8652FC, MMA8653FC.
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accelerometers: MMA8451Q, MMA8452Q, MMA8453Q, MMA8652FC, MMA8653FC.
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To compile this driver as a module, choose M here: the module
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will be called mma8452.
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@ -1,6 +1,7 @@
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/*
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* mma8452.c - Support for following Freescale 3-axis accelerometers:
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*
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* MMA8451Q (14 bit)
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* MMA8452Q (12 bit)
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* MMA8453Q (10 bit)
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* MMA8652FC (12 bit)
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@ -85,6 +86,7 @@
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#define MMA8452_INT_FF_MT BIT(2)
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#define MMA8452_INT_TRANS BIT(5)
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#define MMA8451_DEVICE_ID 0x1a
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#define MMA8452_DEVICE_ID 0x2a
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#define MMA8453_DEVICE_ID 0x3a
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#define MMA8652_DEVICE_ID 0x4a
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@ -942,6 +944,14 @@ static struct attribute_group mma8452_event_attribute_group = {
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.num_event_specs = ARRAY_SIZE(mma8452_motion_event), \
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}
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static const struct iio_chan_spec mma8451_channels[] = {
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MMA8452_CHANNEL(X, idx_x, 14),
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MMA8452_CHANNEL(Y, idx_y, 14),
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MMA8452_CHANNEL(Z, idx_z, 14),
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IIO_CHAN_SOFT_TIMESTAMP(idx_ts),
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MMA8452_FREEFALL_CHANNEL(IIO_MOD_X_AND_Y_AND_Z),
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};
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static const struct iio_chan_spec mma8452_channels[] = {
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MMA8452_CHANNEL(X, idx_x, 12),
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MMA8452_CHANNEL(Y, idx_y, 12),
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@ -975,6 +985,7 @@ static const struct iio_chan_spec mma8653_channels[] = {
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};
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enum {
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mma8451,
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mma8452,
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mma8453,
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mma8652,
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@ -982,17 +993,34 @@ enum {
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};
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static const struct mma_chip_info mma_chip_info_table[] = {
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[mma8451] = {
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.chip_id = MMA8451_DEVICE_ID,
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.channels = mma8451_channels,
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.num_channels = ARRAY_SIZE(mma8451_channels),
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/*
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* Hardware has fullscale of -2G, -4G, -8G corresponding to
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* raw value -8192 for 14 bit, -2048 for 12 bit or -512 for 10
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* bit.
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* The userspace interface uses m/s^2 and we declare micro units
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* So scale factor for 12 bit here is given by:
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* g * N * 1000000 / 2048 for N = 2, 4, 8 and g=9.80665
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*/
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.mma_scales = { {0, 2394}, {0, 4788}, {0, 9577} },
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.ev_cfg = MMA8452_TRANSIENT_CFG,
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.ev_cfg_ele = MMA8452_TRANSIENT_CFG_ELE,
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.ev_cfg_chan_shift = 1,
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.ev_src = MMA8452_TRANSIENT_SRC,
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.ev_src_xe = MMA8452_TRANSIENT_SRC_XTRANSE,
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.ev_src_ye = MMA8452_TRANSIENT_SRC_YTRANSE,
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.ev_src_ze = MMA8452_TRANSIENT_SRC_ZTRANSE,
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.ev_ths = MMA8452_TRANSIENT_THS,
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.ev_ths_mask = MMA8452_TRANSIENT_THS_MASK,
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.ev_count = MMA8452_TRANSIENT_COUNT,
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},
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[mma8452] = {
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.chip_id = MMA8452_DEVICE_ID,
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.channels = mma8452_channels,
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.num_channels = ARRAY_SIZE(mma8452_channels),
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/*
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* Hardware has fullscale of -2G, -4G, -8G corresponding to
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* raw value -2048 for 12 bit or -512 for 10 bit.
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* The userspace interface uses m/s^2 and we declare micro units
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* So scale factor for 12 bit here is given by:
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* g * N * 1000000 / 2048 for N = 2, 4, 8 and g=9.80665
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*/
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.mma_scales = { {0, 9577}, {0, 19154}, {0, 38307} },
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.ev_cfg = MMA8452_TRANSIENT_CFG,
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.ev_cfg_ele = MMA8452_TRANSIENT_CFG_ELE,
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@ -1173,6 +1201,7 @@ static int mma8452_reset(struct i2c_client *client)
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}
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static const struct of_device_id mma8452_dt_ids[] = {
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{ .compatible = "fsl,mma8451", .data = &mma_chip_info_table[mma8451] },
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{ .compatible = "fsl,mma8452", .data = &mma_chip_info_table[mma8452] },
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{ .compatible = "fsl,mma8453", .data = &mma_chip_info_table[mma8453] },
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{ .compatible = "fsl,mma8652", .data = &mma_chip_info_table[mma8652] },
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@ -1209,6 +1238,7 @@ static int mma8452_probe(struct i2c_client *client,
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return ret;
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switch (ret) {
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case MMA8451_DEVICE_ID:
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case MMA8452_DEVICE_ID:
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case MMA8453_DEVICE_ID:
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case MMA8652_DEVICE_ID:
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