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iio: health: max30102: Add check for part ID

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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>
This commit is contained in:
Peter Meerwald-Stadler 2017-10-27 21:45:36 +02:00 committed by Jonathan Cameron
parent d0b950c73d
commit 84b0ce05e4
1 changed files with 18 additions and 0 deletions
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18
drivers/iio/health/max30102.c
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@ -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, &reg);
if (ret)
return ret;
if (reg != MAX30102_PART_NUMBER)
return -ENODEV;
/* show revision ID */
ret = regmap_read(data->regmap, MAX30102_REG_REV_ID, &reg);
if (ret)
return ret;
dev_dbg(&client->dev, "max3010x revision %02x\n", reg);
ret = max30102_set_powermode(data, false);
if (ret)
return ret;