linux-kernel - [PATCH] iio: cros_ec: set calibscale for 3d MEMS to unit vector

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Date:   Mon, 19 Aug 2019 22:10:29 -0700
From:   Gwendal Grignou <gwendal@...omium.org>
To:     jic23@...nel.org
Cc:     enric.balletbo@...labora.com, linux-iio@...r.kernel.org,
        Gwendal Grignou <gwendal@...omium.org>,
        Nick Vaccaro <nvaccaro@...omium.org>,
        Guenter Roeck <groeck@...omium.org>,
        Hartmut Knaack <knaack.h@....de>,
        Fabien Lahoudere <fabien.lahoudere@...labora.com>,
        Benson Leung <bleung@...omium.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        linux-kernel@...r.kernel.org
Subject: [PATCH] iio: cros_ec: set calibscale for 3d MEMS to unit vector

By default, set the calibscale vector to unit vector.
It prevents sending 0 as calibscale when not initialized.

Signed-off-by: Gwendal Grignou <gwendal@...omium.org>
---

 drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
index fd833295bb173..d44ae126f4578 100644
--- a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
+++ b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
@@ -90,7 +90,7 @@ int cros_ec_sensors_core_init(struct platform_device *pdev,
 	struct cros_ec_dev *ec = dev_get_drvdata(pdev->dev.parent);
 	struct cros_ec_sensor_platform *sensor_platform = dev_get_platdata(dev);
 	u32 ver_mask;
-	int ret;
+	int ret, i;
 
 	platform_set_drvdata(pdev, indio_dev);
 
@@ -136,6 +136,9 @@ int cros_ec_sensors_core_init(struct platform_device *pdev,
 		/* Set sign vector, only used for backward compatibility. */
 		memset(state->sign, 1, CROS_EC_SENSOR_MAX_AXIS);
 
+		for (i = CROS_EC_SENSOR_X; i < CROS_EC_SENSOR_MAX_AXIS; i++)
+			state->calib[i].scale = MOTION_SENSE_DEFAULT_SCALE;
+
 		/* 0 is a correct value used to stop the device */
 		state->frequencies[0] = 0;
 		if (state->msg->version < 3) {
-- 
2.23.0.rc1.153.gdeed80330f-goog