[PATCH 4/8] iio: mma8452: add support for MMA8652FC and MMA8653FC accelerometers
From: Martin Kepplinger
Date: Mon Jul 27 2015 - 10:14:54 EST
MMA8652FC and MMA8653FC don't provide the transient interrupt source, so
the motion interrupt source is used by providing a new iio_chan_spec
definition, so that other supported devices are not affected by this.
Datasheets for the newly supported devices are available at Freescale's
website:
http://cache.freescale.com/files/sensors/doc/data_sheet/MMA8652FC.pdf
http://cache.freescale.com/files/sensors/doc/data_sheet/MMA8653FC.pdf
Signed-off-by: Martin Kepplinger <martin.kepplinger@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Christoph Muellner <christoph.muellner@xxxxxxxxxxxxxxxxxxxxx>
---
drivers/iio/accel/Kconfig | 2 +-
drivers/iio/accel/mma8452.c | 98 +++++++++++++++++++++++++++++++++++++++++----
2 files changed, 92 insertions(+), 8 deletions(-)
diff --git a/drivers/iio/accel/Kconfig b/drivers/iio/accel/Kconfig
index dc80dc9..fdb59e0 100644
--- a/drivers/iio/accel/Kconfig
+++ b/drivers/iio/accel/Kconfig
@@ -93,7 +93,7 @@ config MMA8452
select IIO_TRIGGERED_BUFFER
help
Say yes here to build support for the following Freescale 3-axis
- accelerometers: MMA8452Q, MMA8453Q.
+ accelerometers: MMA8452Q, MMA8453Q, MMA8652FC, MMA8653FC.
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 d51ce63..5a8c738 100644
--- a/drivers/iio/accel/mma8452.c
+++ b/drivers/iio/accel/mma8452.c
@@ -3,6 +3,8 @@
*
* MMA8452Q
* MMA8453Q
+ * MMA8652FC
+ * MMA8653FC
*
* Copyright 2014 Peter Meerwald <pmeerw@xxxxxxxxxx>
*
@@ -87,6 +89,8 @@
#define MMA8452_DEVICE_ID 0x2a
#define MMA8453_DEVICE_ID 0x3a
+#define MMA8652_DEVICE_ID 0x4a
+#define MMA8653_DEVICE_ID 0x5a
struct mma8452_data {
struct i2c_client *client;
@@ -766,6 +770,26 @@ static struct attribute_group mma8452_event_attribute_group = {
.num_event_specs = ARRAY_SIZE(mma8452_transient_event), \
}
+#define MMA8652_CHANNEL(axis, idx, bits) { \
+ .type = IIO_ACCEL, \
+ .modified = 1, \
+ .channel2 = IIO_MOD_##axis, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
+ BIT(IIO_CHAN_INFO_CALIBBIAS), \
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SAMP_FREQ) | \
+ BIT(IIO_CHAN_INFO_SCALE), \
+ .scan_index = idx, \
+ .scan_type = { \
+ .sign = 's', \
+ .realbits = (bits), \
+ .storagebits = 16, \
+ .shift = 16 - (bits), \
+ .endianness = IIO_BE, \
+ }, \
+ .event_spec = mma8452_motion_event, \
+ .num_event_specs = ARRAY_SIZE(mma8452_motion_event), \
+}
+
static const struct iio_chan_spec mma8452_channels[] = {
MMA8452_CHANNEL(X, 0, 12),
MMA8452_CHANNEL(Y, 1, 12),
@@ -780,9 +804,25 @@ static const struct iio_chan_spec mma8453_channels[] = {
IIO_CHAN_SOFT_TIMESTAMP(3),
};
+static const struct iio_chan_spec mma8652_channels[] = {
+ MMA8652_CHANNEL(X, 0, 12),
+ MMA8652_CHANNEL(Y, 1, 12),
+ MMA8652_CHANNEL(Z, 2, 12),
+ IIO_CHAN_SOFT_TIMESTAMP(3),
+};
+
+static const struct iio_chan_spec mma8653_channels[] = {
+ MMA8652_CHANNEL(X, 0, 10),
+ MMA8652_CHANNEL(Y, 1, 10),
+ MMA8652_CHANNEL(Z, 2, 10),
+ IIO_CHAN_SOFT_TIMESTAMP(3),
+};
+
enum {
mma8452,
mma8453,
+ mma8652,
+ mma8653,
};
static const struct mma_chip_info mma_chip_info_table[] = {
@@ -825,6 +865,38 @@ static const struct mma_chip_info mma_chip_info_table[] = {
.ev_ths_mask = MMA8452_TRANSIENT_THS_MASK,
.ev_count = MMA8452_TRANSIENT_COUNT,
},
+ [mma8652] = {
+ .chip_id = MMA8652_DEVICE_ID,
+ .channels = mma8652_channels,
+ .num_channels = ARRAY_SIZE(mma8652_channels),
+ .mma_scales = { {0, 9577}, {0, 19154}, {0, 38307} },
+ .ev_cfg = MMA8452_FF_MT_CFG,
+ .ev_cfg_ele = MMA8452_FF_MT_CFG_ELE,
+ .ev_cfg_chan_shift = 3,
+ .ev_src = MMA8452_FF_MT_SRC,
+ .ev_src_xe = MMA8452_FF_MT_SRC_XHE,
+ .ev_src_ye = MMA8452_FF_MT_SRC_YHE,
+ .ev_src_ze = MMA8452_FF_MT_SRC_ZHE,
+ .ev_ths = MMA8452_FF_MT_THS,
+ .ev_ths_mask = MMA8452_FF_MT_THS_MASK,
+ .ev_count = MMA8452_FF_MT_COUNT,
+ },
+ [mma8653] = {
+ .chip_id = MMA8653_DEVICE_ID,
+ .channels = mma8653_channels,
+ .num_channels = ARRAY_SIZE(mma8653_channels),
+ .mma_scales = { {0, 38307}, {0, 76614}, {0, 153228} },
+ .ev_cfg = MMA8452_FF_MT_CFG,
+ .ev_cfg_ele = MMA8452_FF_MT_CFG_ELE,
+ .ev_cfg_chan_shift = 3,
+ .ev_src = MMA8452_FF_MT_SRC,
+ .ev_src_xe = MMA8452_FF_MT_SRC_XHE,
+ .ev_src_ye = MMA8452_FF_MT_SRC_YHE,
+ .ev_src_ze = MMA8452_FF_MT_SRC_ZHE,
+ .ev_ths = MMA8452_FF_MT_THS,
+ .ev_ths_mask = MMA8452_FF_MT_THS_MASK,
+ .ev_count = MMA8452_FF_MT_COUNT,
+ },
};
static struct attribute *mma8452_attributes[] = {
@@ -946,6 +1018,8 @@ 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] },
+ { .compatible = "fsl,mma8652", .data = &mma_chip_info_table[mma8652] },
+ { .compatible = "fsl,mma8653", .data = &mma_chip_info_table[mma8653] },
{ }
};
@@ -957,13 +1031,6 @@ static int mma8452_probe(struct i2c_client *client,
int ret;
const struct of_device_id *match;
- ret = i2c_smbus_read_byte_data(client, MMA8452_WHO_AM_I);
- if (ret < 0)
- return ret;
-
- if (ret != MMA8452_DEVICE_ID && ret != MMA8453_DEVICE_ID)
- return -ENODEV;
-
match = of_match_device(mma8452_dt_ids, &client->dev);
if (!match) {
dev_err(&client->dev, "unknown device model\n");
@@ -979,6 +1046,21 @@ static int mma8452_probe(struct i2c_client *client,
mutex_init(&data->lock);
data->chip_info = match->data;
+ ret = i2c_smbus_read_byte_data(client, MMA8452_WHO_AM_I);
+ if (ret < 0)
+ return ret;
+
+ switch (ret) {
+ case MMA8452_DEVICE_ID:
+ case MMA8453_DEVICE_ID:
+ case MMA8652_DEVICE_ID:
+ case MMA8653_DEVICE_ID:
+ if (ret == data->chip_info->chip_id)
+ break;
+ default:
+ return -ENODEV;
+ }
+
dev_info(&client->dev, "registering %s accelerometer; ID 0x%x\n",
match->compatible, data->chip_info->chip_id);
@@ -1111,6 +1193,8 @@ static SIMPLE_DEV_PM_OPS(mma8452_pm_ops, mma8452_suspend, mma8452_resume);
static const struct i2c_device_id mma8452_id[] = {
{ "mma8452", mma8452 },
{ "mma8453", mma8453 },
+ { "mma8652", mma8652 },
+ { "mma8653", mma8653 },
{ }
};
MODULE_DEVICE_TABLE(i2c, mma8452_id);
--
2.1.4
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