CTRL1 register (ODR & BDU settings) gets reset after system comes back
from suspend, causing subsequent reads from the sensor to fail.
This patch restores the CTRL1 register after resume.
Based on:
git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git iio-fixes-for-4.14b
Since 4.17.rc1, this driver uses REGMAP; I'll send a separate patch to
address this issue.
Cc: stable@xxxxxxxxxxxxxxx
Fixes: ffebe74b7c95 (iio: humidity: hts221: avoid useless ODR reconfiguration)
Signed-off-by: Shrirang Bagul <shrirang.bagul@xxxxxxxxxxxxx>
---
drivers/iio/humidity/hts221_core.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)
diff --git a/drivers/iio/humidity/hts221_core.c b/drivers/iio/humidity/hts221_core.c
index 32524a8dc66f..fed2da64fa3b 100644
--- a/drivers/iio/humidity/hts221_core.c
+++ b/drivers/iio/humidity/hts221_core.c
@@ -674,11 +674,15 @@ static int __maybe_unused hts221_resume(struct device *dev)
struct hts221_hw *hw = iio_priv(iio_dev);
int err = 0;
- if (hw->enabled)
- err = hts221_write_with_mask(hw, HTS221_REG_CNTRL1_ADDR,
- HTS221_ENABLE_MASK, true);
+ err = hts221_write_with_mask(hw, HTS221_REG_CNTRL1_ADDR,
+ HTS221_BDU_MASK, 1);
+ if (err < 0)
+ goto fail_err;
- return err;
+ err = hts221_update_odr(hw, hw->odr);
+
+fail_err:
+ return err < 0 ? err : 0;
}
const struct dev_pm_ops hts221_pm_ops = {
--
2.14.1
--
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