linux-kernel - [PATCH] iio: st_sensors: Fix the sleep time for sampling

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Message-Id: <20181119061219.14238-1-jian-hong@endlessm.com>
Date:   Mon, 19 Nov 2018 14:12:19 +0800
From:   Jian-Hong Pan <jian-hong@...lessm.com>
To:     Jonathan Cameron <jic23@...nel.org>,
        Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Dominique Martinet <asmadeus@...ewreck.org>
Cc:     linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux@...lessm.com, Jian-Hong Pan <jian-hong@...lessm.com>
Subject: [PATCH] iio: st_sensors: Fix the sleep time for sampling

According to the description of st_sensor_settings and st_sensor_data
structures' comments:
- bootime: samples to discard when sensor passing from power-down to
power-up.
- odr: Output data rate of the sensor [Hz].

The sleep time should be
sdata->sensor_settings->bootime + 1000 / sdata->odr ms.

Signed-off-by: Jian-Hong Pan <jian-hong@...lessm.com>
---
 drivers/iio/common/st_sensors/st_sensors_core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/common/st_sensors/st_sensors_core.c b/drivers/iio/common/st_sensors/st_sensors_core.c
index 26fbd1bd9413..6b87ea657a92 100644
--- a/drivers/iio/common/st_sensors/st_sensors_core.c
+++ b/drivers/iio/common/st_sensors/st_sensors_core.c
@@ -594,7 +594,7 @@ int st_sensors_read_info_raw(struct iio_dev *indio_dev,
 		if (err < 0)
 			goto out;
 
-		msleep((sdata->sensor_settings->bootime * 1000) / sdata->odr);
+		msleep(sdata->sensor_settings->bootime + 1000 / sdata->odr);
 		err = st_sensors_read_axis_data(indio_dev, ch, val);
 		if (err < 0)
 			goto out;
-- 
2.11.0