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iio: adc: mcp3422: Checking for error on probe 

Some part of the configuration are not touched after the probe
and if something goes wrong on writing the initial one,
the chip will misbehave.
Adding an error checking ensures that the inital configuration will
be written correctly. Moreover ensures that a sensible configuration
will be saved in driver data and used subsequently as intended.

Signed-off-by: Angelo Compagnucci <angelo.compagnucci@gmail.com>
Reported-by: Maarten Brock <m.brock@vanmierlo.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Angelo Compagnucci 2017-06-28 23:53:10 +02:00 committed by Jonathan Cameron
parent e3169994f6
commit 6be72b9067
1 changed files with 3 additions and 1 deletions
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4
drivers/iio/adc/mcp3422.c
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@ -382,7 +382,9 @@ static int mcp3422_probe(struct i2c_client *client,
| MCP3422_CHANNEL_VALUE(0)
| MCP3422_PGA_VALUE(MCP3422_PGA_1)
| MCP3422_SAMPLE_RATE_VALUE(MCP3422_SRATE_240));
mcp3422_update_config(adc, config);
err = mcp3422_update_config(adc, config);
if (err < 0)
return err;
err = devm_iio_device_register(&client->dev, indio_dev);
if (err < 0)