This adds support for the 10 bit version if Freescale's accelerometers of this series. The datasheet is available at Freescale's website:
http://cache.freescale.com/files/sensors/doc/data_sheet/MMA8453Q.pdf Signed-off-by: Martin Kepplinger <martin.kepplin...@theobroma-systems.com> Signed-off-by: Christoph Muellner <christoph.muell...@theobroma-systems.com> --- drivers/iio/accel/Kconfig | 6 +++--- drivers/iio/accel/mma8452.c | 41 ++++++++++++++++++++++++++++++++++++++--- 2 files changed, 41 insertions(+), 6 deletions(-) diff --git a/drivers/iio/accel/Kconfig b/drivers/iio/accel/Kconfig index 00e7bcb..91fab16 100644 --- a/drivers/iio/accel/Kconfig +++ b/drivers/iio/accel/Kconfig @@ -87,13 +87,13 @@ config KXSD9 will be called kxsd9. config MMA8452 - tristate "Freescale MMA8452Q Accelerometer Driver" + tristate "Freescale MMA8452 Accelerometer Driver" depends on I2C select IIO_BUFFER select IIO_TRIGGERED_BUFFER help - Say yes here to build support for the Freescale MMA8452Q 3-axis - accelerometer. + Say yes here to build support for the following Freescale 3-axis + accelerometers: MMA8452Q, MMA8453Q. To compile this driver as a module, choose M here: the module will be called mma8452. diff --git a/drivers/iio/accel/mma8452.c b/drivers/iio/accel/mma8452.c index b2ebfcb..209b0d7 100644 --- a/drivers/iio/accel/mma8452.c +++ b/drivers/iio/accel/mma8452.c @@ -1,5 +1,8 @@ /* - * mma8452.c - Support for Freescale MMA8452Q 3-axis 12-bit accelerometer + * mma8452.c - Support for following Freescale 3-axis accelerometers: + * + * MMA8452Q + * MMA8453Q * * Copyright 2014 Peter Meerwald <pme...@pmeerw.net> * @@ -27,7 +30,7 @@ #define DRIVER_NAME "mma8452" #define MMA8452_STATUS 0x00 -#define MMA8452_OUT_X 0x01 /* MSB first, 12-bit */ +#define MMA8452_OUT_X 0x01 /* MSB first, 10 or 12-bit */ #define MMA8452_OUT_Y 0x03 #define MMA8452_OUT_Z 0x05 #define MMA8452_INT_SRC 0x0c @@ -74,6 +77,7 @@ #define MMA8452_INT_TRANS BIT(5) #define MMA8452_DEVICE_ID 0x2a +#define MMA8453_DEVICE_ID 0x3a struct mma8452_data { struct i2c_client *client; @@ -718,8 +722,16 @@ static const struct iio_chan_spec mma8452_channels[] = { IIO_CHAN_SOFT_TIMESTAMP(3), }; +static const struct iio_chan_spec mma8453_channels[] = { + MMA8452_CHANNEL(X, 0, 10), + MMA8452_CHANNEL(Y, 1, 10), + MMA8452_CHANNEL(Z, 2, 10), + IIO_CHAN_SOFT_TIMESTAMP(3), +}; + enum { mma8452, + mma8453, }; /* @@ -747,7 +759,24 @@ static const struct mma_chip_info mma_chip_info_table[] = { .ev_ths_mask = MMA8452_TRANSIENT_THS_MASK, .ev_count = MMA8452_TRANSIENT_COUNT, }, + [mma8453] = { + .chip_id = MMA8453_DEVICE_ID, + .channels = mma8453_channels, + .num_channels = ARRAY_SIZE(mma8453_channels), + .mma_scales = { {0, 38307}, {0, 76614}, {0, 153228} }, + .ev_cfg = MMA8452_TRANSIENT_CFG, + .ev_cfg_ele = MMA8452_TRANSIENT_CFG_ELE, + .ev_cfg_chan_shift = 1, + .ev_src = MMA8452_TRANSIENT_SRC, + .ev_src_xe = MMA8452_TRANSIENT_SRC_XTRANSE, + .ev_src_ye = MMA8452_TRANSIENT_SRC_YTRANSE, + .ev_src_ze = MMA8452_TRANSIENT_SRC_ZTRANSE, + .ev_ths = MMA8452_TRANSIENT_THS, + .ev_ths_mask = MMA8452_TRANSIENT_THS_MASK, + .ev_count = MMA8452_TRANSIENT_COUNT, + }, }; + static struct attribute *mma8452_attributes[] = { &iio_dev_attr_sampling_frequency_available.dev_attr.attr, &iio_dev_attr_in_accel_scale_available.dev_attr.attr, @@ -866,6 +895,7 @@ static int mma8452_reset(struct i2c_client *client) static const struct of_device_id mma8452_dt_ids[] = { { .compatible = "fsl,mma8452", .data = &mma_chip_info_table[mma8452] }, + { .compatible = "fsl,mma8453", .data = &mma_chip_info_table[mma8453] }, { } }; @@ -880,7 +910,8 @@ static int mma8452_probe(struct i2c_client *client, ret = i2c_smbus_read_byte_data(client, MMA8452_WHO_AM_I); if (ret < 0) return ret; - if (ret != MMA8452_DEVICE_ID) + + if (ret != MMA8452_DEVICE_ID && ret != MMA8453_DEVICE_ID) return -ENODEV; match = of_match_device(mma8452_dt_ids, &client->dev); @@ -898,6 +929,9 @@ static int mma8452_probe(struct i2c_client *client, data->chip_info = match->data; mutex_init(&data->lock); + dev_info(&client->dev, "registering %s accelerometer; ID 0x%x\n", + match->compatible, data->chip_info->chip_id); + i2c_set_clientdata(client, indio_dev); indio_dev->info = &mma8452_info; indio_dev->name = DRIVER_NAME; @@ -1024,6 +1058,7 @@ static SIMPLE_DEV_PM_OPS(mma8452_pm_ops, mma8452_suspend, mma8452_resume); static const struct i2c_device_id mma8452_id[] = { { "mma8452", mma8452 }, + { "mma8453", mma8453 }, { } }; MODULE_DEVICE_TABLE(i2c, mma8452_id); -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
