Commit e8245c68 authored Jul 21, 2017 by Akinobu Mita Committed by Jonathan Cameron Aug 20, 2017

iio: adc: ti-ads1015: enable conversion when CONFIG_PM is not set



The ADS1015 device have two operating modes, continuous conversion mode
and single-shot mode.  This driver assumes that the continuous conversion
mode is selected by runtime resume callback when the ADC result is
requested.

If CONFIG_PM is disabled, the device is always in the default single-shot
mode and no one begins a single conversion.  So the conversion register
doesn't contain valid ADC result.  Fix it by changing the continuous mode
in probe function.

Cc: Daniel Baluta <daniel.baluta@gmail.com>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

parent 8d0e8e79

drivers/iio/adc/ti-ads1015.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -623,6 +623,13 @@ static int ads1015_probe(struct i2c_client *client,
		dev_err(&client->dev, "iio triggered buffer setup failed\n");
		return ret;
		}

		ret = regmap_update_bits(data->regmap, ADS1015_CFG_REG,
		ADS1015_CFG_MOD_MASK,
		ADS1015_CONTINUOUS << ADS1015_CFG_MOD_SHIFT);
		if (ret)
		return ret;

		ret = pm_runtime_set_active(&client->dev);
		if (ret)
		goto err_buffer_cleanup;