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| author | Martin Fuzzey | 2015-05-13 12:26:40 +0200 |
|---|---|---|
| committer | Jonathan Cameron | 2015-05-17 11:31:09 +0200 |
| commit | 2a17698c0e23f3548db2c698e0da80a00814361d (patch) | |
| tree | 2652ca505a0f60d80f4150029f15fd0c895c217e /drivers/iio/accel/mma8452.c | |
| parent | iio: mma8452: Initialise before activating (diff) | |
| download | kernel-qcow2-linux-2a17698c0e23f3548db2c698e0da80a00814361d.tar.gz kernel-qcow2-linux-2a17698c0e23f3548db2c698e0da80a00814361d.tar.xz kernel-qcow2-linux-2a17698c0e23f3548db2c698e0da80a00814361d.zip | |
iio: mma8452: Add access to registers via DebugFS
Signed-off-by: Martin Fuzzey <mfuzzey@parkeon.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio/accel/mma8452.c')
| -rw-r--r-- | drivers/iio/accel/mma8452.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/iio/accel/mma8452.c b/drivers/iio/accel/mma8452.c index 001a7dbc863c..877ce2954196 100644 --- a/drivers/iio/accel/mma8452.c +++ b/drivers/iio/accel/mma8452.c @@ -34,6 +34,8 @@ #define MMA8452_CTRL_REG2 0x2b #define MMA8452_CTRL_REG2_RST BIT(6) +#define MMA8452_MAX_REG 0x31 + #define MMA8452_STATUS_DRDY (BIT(2) | BIT(1) | BIT(0)) #define MMA8452_CTRL_DR_MASK (BIT(5) | BIT(4) | BIT(3)) @@ -292,6 +294,28 @@ done: return IRQ_HANDLED; } +static int mma8452_reg_access_dbg(struct iio_dev *indio_dev, + unsigned reg, unsigned writeval, + unsigned *readval) +{ + int ret; + struct mma8452_data *data = iio_priv(indio_dev); + + if (reg > MMA8452_MAX_REG) + return -EINVAL; + + if (!readval) + return mma8452_change_config(data, reg, writeval); + + ret = i2c_smbus_read_byte_data(data->client, reg); + if (ret < 0) + return ret; + + *readval = ret; + + return 0; +} + #define MMA8452_CHANNEL(axis, idx) { \ .type = IIO_ACCEL, \ .modified = 1, \ @@ -331,6 +355,7 @@ static const struct iio_info mma8452_info = { .attrs = &mma8452_group, .read_raw = &mma8452_read_raw, .write_raw = &mma8452_write_raw, + .debugfs_reg_access = &mma8452_reg_access_dbg, .driver_module = THIS_MODULE, }; |