From: Akinobu Mita Date: Thu, 20 Jul 2017 15:24:19 +0000 (+0900) Subject: iio: adc: ti-ads1015: enable conversion when CONFIG_PM is not set X-Git-Tag: v4.14-rc1~148^2~228^2~10 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=e8245c68350104b6022b6783719e843d69ea7c43;p=linux.git 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 Signed-off-by: Akinobu Mita Cc: Signed-off-by: Jonathan Cameron --- 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;