From: Qiwu Huang <[email protected]>
reports wireless signal strength.
The value show degree of coupling between tx and rx.
Signed-off-by: Qiwu Huang <[email protected]>
---
Documentation/ABI/testing/sysfs-class-power | 11 +++++++++++
drivers/power/supply/power_supply_sysfs.c | 1 +
include/linux/power_supply.h | 1 +
3 files changed, 13 insertions(+)
diff --git a/Documentation/ABI/testing/sysfs-class-power b/Documentation/ABI/testing/sysfs-class-power
index cd07d3f4e8b1..f10780be2732 100644
--- a/Documentation/ABI/testing/sysfs-class-power
+++ b/Documentation/ABI/testing/sysfs-class-power
@@ -729,3 +729,14 @@ Description:
Access: Read-Only
Valid values: Reported as integer
+
+What: /sys/class/power_supply/<supply_name>/signal_strength
+Date: Jul 2020
+Contact: Fei Jiang <[email protected]>
+Description:
+ Reports wireless signal strength.The value show degree of coupling.
+ Unit is KHZ,the "value" means the working frequency of receiver
+ chip of wireless charging.
+
+ Access: Read-Only
+ Valid values: Reported as integer
diff --git a/drivers/power/supply/power_supply_sysfs.c b/drivers/power/supply/power_supply_sysfs.c
index f2458e21d02b..e420a453095e 100644
--- a/drivers/power/supply/power_supply_sysfs.c
+++ b/drivers/power/supply/power_supply_sysfs.c
@@ -208,6 +208,7 @@ static struct power_supply_attr power_supply_attrs[] = {
POWER_SUPPLY_ATTR(SERIAL_NUMBER),
POWER_SUPPLY_ATTR(QUICK_CHARGE_TYPE),
POWER_SUPPLY_ATTR(TX_ADAPTER),
+ POWER_SUPPLY_ATTR(SIGNAL_STRENGTH),
};
static struct attribute *
diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h
index 2de9a4c93723..397fb8e96b03 100644
--- a/include/linux/power_supply.h
+++ b/include/linux/power_supply.h
@@ -169,6 +169,7 @@ enum power_supply_property {
POWER_SUPPLY_PROP_SERIAL_NUMBER,
POWER_SUPPLY_PROP_QUICK_CHARGE_TYPE,
POWER_SUPPLY_PROP_TX_ADAPTER,
+ POWER_SUPPLY_PROP_SIGNAL_STRENGTH,
};
enum power_supply_type {
--
2.27.0