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authorAkinobu Mita <akinobu.mita@gmail.com>2017-07-20 18:24:19 +0300
committerJonathan Cameron <Jonathan.Cameron@huawei.com>2017-08-20 17:41:13 +0300
commite8245c68350104b6022b6783719e843d69ea7c43 (patch)
treea90c5438d4d9a529a20be63c14e5574304f5d99c /drivers/iio
parent8d0e8e795623bd6229cf48bb7777a1c456c370ed (diff)
downloadlinux-e8245c68350104b6022b6783719e843d69ea7c43.tar.xz
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>
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 9c17a97c1107..9d77e837c09b 100644
--- a/drivers/iio/adc/ti-ads1015.c
+++ b/drivers/iio/adc/ti-ads1015.c
@@ -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;