diff options
| author | Peter Meerwald-Stadler <pmeerw@pmeerw.net> | 2017-10-27 21:45:36 +0200 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2017-12-02 10:40:46 +0000 |
| commit | 84b0ce05e4a5f1e17b2c74d7afbe72113b6f8a04 (patch) | |
| tree | 08549959bdb29e79b91634e8f84058aa9c5f3a1b /drivers/iio/health | |
| parent | d0b950c73dee67c2232482dbb6949b7a4f25a828 (diff) | |
| download | linux-84b0ce05e4a5f1e17b2c74d7afbe72113b6f8a04.tar.gz | |
iio: health: max30102: Add check for part ID
Signed-off-by: Peter Meerwald-Stadler <pmeerw@pmeerw.net> Acked-by: Matt Ranostay <matt.ranostay@konsulko.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio/health')
| -rw-r--r-- | drivers/iio/health/max30102.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/iio/health/max30102.c b/drivers/iio/health/max30102.c index 3b6213af79ea..0123347bed58 100644 --- a/drivers/iio/health/max30102.c +++ b/drivers/iio/health/max30102.c @@ -32,6 +32,7 @@ #define MAX30102_REGMAP_NAME "max30102_regmap" #define MAX30102_DRV_NAME "max30102" +#define MAX30102_PART_NUMBER 0x15 #define MAX30102_REG_INT_STATUS 0x00 #define MAX30102_REG_INT_STATUS_PWR_RDY BIT(0) @@ -83,6 +84,9 @@ #define MAX30102_REG_TEMP_INTEGER 0x1f #define MAX30102_REG_TEMP_FRACTION 0x20 +#define MAX30102_REG_REV_ID 0xfe +#define MAX30102_REG_PART_ID 0xff + struct max30102_data { struct i2c_client *client; struct iio_dev *indio_dev; @@ -391,6 +395,7 @@ static int max30102_probe(struct i2c_client *client, struct iio_buffer *buffer; struct iio_dev *indio_dev; int ret; + unsigned int reg; indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); if (!indio_dev) @@ -424,6 +429,19 @@ static int max30102_probe(struct i2c_client *client, return PTR_ERR(data->regmap); } + /* check part ID */ + ret = regmap_read(data->regmap, MAX30102_REG_PART_ID, ®); + if (ret) + return ret; + if (reg != MAX30102_PART_NUMBER) + return -ENODEV; + + /* show revision ID */ + ret = regmap_read(data->regmap, MAX30102_REG_REV_ID, ®); + if (ret) + return ret; + dev_dbg(&client->dev, "max3010x revision %02x\n", reg); + ret = max30102_set_powermode(data, false); if (ret) return ret; |