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FAILED: patch "[PATCH] iio: hid-sensor-prox: Fix scale not correct issue" failed to apply to 4.4-stable tree

PATCH [email protected] 1 participant 1 message Mar 22, 2021

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Stable branch IIO HID sensor hub drivers
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The patch below does not apply to the 4.4-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 <[email protected]>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From d68c592e02f6f49a88e705f13dfc1883432cf300 Mon Sep 17 00:00:00 2001
From: Ye Xiang <[email protected]>
Date: Sat, 30 Jan 2021 18:25:30 +0800
Subject: [PATCH] iio: hid-sensor-prox: Fix scale not correct issue

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 <[email protected]>
Link https://lore.kernel.org/r/[email protected] open here
Cc <[email protected]>
Signed-off-by Jonathan Cameron <[email protected]>
drivers/iio/light/hid-sensor-prox.c +11 -2
index 330cf359e0b8..e9e00ce0c6d4 100644
@@ -23,6 +23,9 @@ 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 */

@@ -93,8 +96,9 @@ 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(

@@ -234,6 +238,11 @@ static int prox_parse_report(struct platform_device *pdev,
 			HID_USAGE_SENSOR_HUMAN_PRESENCE,
 			&st->common_attributes.sensitivity);
 
+	st->scale_precision = hid_sensor_format_scale(
+				hsdev->usage,
+				&st->prox_attr,
+				&st->scale_pre_decml, &st->scale_post_decml);
+
 	return ret;
 }