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iio: mma8452: Add access to registers via DebugFS 

Signed-off-by: Martin Fuzzey <mfuzzey@parkeon.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
hifive-unleashed-5.1
Martin Fuzzey 2015-05-13 12:26:40 +02:00 committed by Jonathan Cameron
parent ecabae7131
commit 2a17698c0e
1 changed files with 25 additions and 0 deletions
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25
drivers/iio/accel/mma8452.c
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@ -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,
};