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authorAkinobu Mita <akinobu.mita@gmail.com>2017-07-21 00:24:19 +0900
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-09-09 17:39:38 +0200
commitc72ad1a4fdf044c5253a72bc413e1869d6b16f39 (patch)
tree84504713a6ad91103ca254732c005a3e44d2d28e /drivers/iio
parent115af6c3b155a2e6d1d9c7b3e1db81fbf8d48727 (diff)
iio: adc: ti-ads1015: enable conversion when CONFIG_PM is not set
commit e8245c68350104b6022b6783719e843d69ea7c43 upstream. 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> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/iio')
-rw-r--r--drivers/iio/adc/ti-ads1015.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/iio/adc/ti-ads1015.c b/drivers/iio/adc/ti-ads1015.c
index 5b1ba5585ffd..c6eeb0cf7868 100644
--- a/drivers/iio/adc/ti-ads1015.c
+++ b/drivers/iio/adc/ti-ads1015.c
@@ -617,6 +617,13 @@ 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;