Hi Greg,
On Mon, Mar 22, 2021 at 10:14:40AM +0100, gregkh@xxxxxxxxxxxxxxxxxxx wrote:
>
> The patch below does not apply to the 4.9-stable tree.
> If someone wants it applied there, or to any other stable or longterm
> tree, then please email the backport, including the original git commit
> id to <stable@xxxxxxxxxxxxxxx>.
Here is the backport, will also apply to 4.4-stable.
--
Regards
Sudip
>From 35b0c1a113b0126dbb762cb9204f4590c0851cff Mon Sep 17 00:00:00 2001
From: Ye Xiang <xiang.ye@xxxxxxxxx>
Date: Sat, 30 Jan 2021 18:25:30 +0800
Subject: [PATCH] iio: hid-sensor-prox: Fix scale not correct issue
commit d68c592e02f6f49a88e705f13dfc1883432cf300 upstream
Currently, the proxy sensor scale is zero because it just return the
exponent directly. To fix this issue, this patch use
hid_sensor_format_scale to process the scale first then return the
output.
Fixes: 39a3a0138f61 ("iio: hid-sensors: Added Proximity Sensor Driver")
Signed-off-by: Ye Xiang <xiang.ye@xxxxxxxxx>
Link: https://lore.kernel.org/r/20210130102530.31064-1-xiang.ye@xxxxxxxxx
Cc: <Stable@xxxxxxxxxxxxxxx>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
[sudip: adjust context]
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@xxxxxxxxx>
---
drivers/iio/light/hid-sensor-prox.c | 14 ++++++++++++--
1 file changed, 12 insertions(+), 2 deletions(-)
diff --git a/drivers/iio/light/hid-sensor-prox.c b/drivers/iio/light/hid-sensor-prox.c
index 45ca056f019e..63041dcec7af 100644
--- a/drivers/iio/light/hid-sensor-prox.c
+++ b/drivers/iio/light/hid-sensor-prox.c
@@ -37,6 +37,9 @@ struct prox_state {
struct hid_sensor_common common_attributes;
struct hid_sensor_hub_attribute_info prox_attr;
u32 human_presence;
+ int scale_pre_decml;
+ int scale_post_decml;
+ int scale_precision;
};
/* Channel definitions */
@@ -105,8 +108,9 @@ static int prox_read_raw(struct iio_dev *indio_dev,
ret_type = IIO_VAL_INT;
break;
case IIO_CHAN_INFO_SCALE:
- *val = prox_state->prox_attr.units;
- ret_type = IIO_VAL_INT;
+ *val = prox_state->scale_pre_decml;
+ *val2 = prox_state->scale_post_decml;
+ ret_type = prox_state->scale_precision;
break;
case IIO_CHAN_INFO_OFFSET:
*val = hid_sensor_convert_exponent(
@@ -240,6 +244,12 @@ static int prox_parse_report(struct platform_device *pdev,
st->common_attributes.sensitivity.index,
st->common_attributes.sensitivity.report_id);
}
+
+ st->scale_precision = hid_sensor_format_scale(
+ hsdev->usage,
+ &st->prox_attr,
+ &st->scale_pre_decml, &st->scale_post_decml);
+
return ret;
}
--
2.30.2
