| From e8245c68350104b6022b6783719e843d69ea7c43 Mon Sep 17 00:00:00 2001 |
| From: Akinobu Mita <akinobu.mita@gmail.com> |
| Date: Fri, 21 Jul 2017 00:24:19 +0900 |
| Subject: iio: adc: ti-ads1015: enable conversion when CONFIG_PM is not set |
| |
| From: Akinobu Mita <akinobu.mita@gmail.com> |
| |
| 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> |
| |
| --- |
| drivers/iio/adc/ti-ads1015.c | 7 +++++++ |
| 1 file changed, 7 insertions(+) |
| |
| --- a/drivers/iio/adc/ti-ads1015.c |
| +++ b/drivers/iio/adc/ti-ads1015.c |
| @@ -617,6 +617,13 @@ static int ads1015_probe(struct i2c_clie |
| 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; |