Patch "iio: adc: ti-ads1015: enable conversion when CONFIG_PM is not set" has been added to the 4.9-stable tree

Patch "iio: adc: ti-ads1015: enable conversion when CONFIG_PM is not set" has been added to the 4.9-stable tree

[gregkh]

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 4.9-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-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>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;


Patches currently in stable-queue which might be from akinobu.mita@gmail.com are

queue-4.9/iio-adc-ti-ads1015-enable-conversion-when-config_pm-is-not-set.patch
queue-4.9/iio-adc-ti-ads1015-add-adequate-wait-time-to-get-correct-conversion.patch
queue-4.9/iio-adc-ti-ads1015-don-t-return-invalid-value-from-buffer-setup-callbacks.patch
queue-4.9/iio-adc-ti-ads1015-fix-incorrect-data-rate-setting-update.patch
queue-4.9/iio-adc-ti-ads1015-fix-scale-information-for-ads1115.patch
queue-4.9/iio-adc-ti-ads1015-avoid-getting-stale-result-after-runtime-resume.patch