This is a note to let you know that I've just added the patch titled iio: adc: ti-ads1015: enable conversion when CONFIG_PM is not set to the 4.12-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: iio-adc-ti-ads1015-enable-conversion-when-config_pm-is-not-set.patch and it can be found in the queue-4.12 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From e8245c68350104b6022b6783719e843d69ea7c43 Mon Sep 17 00:00:00 2001 From: Akinobu Mita <akinobu.mita@xxxxxxxxx> 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@xxxxxxxxx> 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@xxxxxxxxx> Signed-off-by: Akinobu Mita <akinobu.mita@xxxxxxxxx> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- 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 @@ -623,6 +623,13 @@ 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; Patches currently in stable-queue which might be from akinobu.mita@xxxxxxxxx are queue-4.12/iio-adc-ti-ads1015-enable-conversion-when-config_pm-is-not-set.patch queue-4.12/iio-adc-ti-ads1015-add-adequate-wait-time-to-get-correct-conversion.patch queue-4.12/iio-adc-ti-ads1015-don-t-return-invalid-value-from-buffer-setup-callbacks.patch queue-4.12/iio-adc-ti-ads1015-fix-incorrect-data-rate-setting-update.patch queue-4.12/iio-adc-ti-ads1015-fix-scale-information-for-ads1115.patch queue-4.12/iio-adc-ti-ads1015-avoid-getting-stale-result-after-runtime-resume.patch