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From: Qiwu Huang <yanziily@gmail.com>
To: sre@kernel.org
Cc: linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org,
	gregkh@linuxfoundation.org, jiangfei1@xiaomi.com,
	Qiwu Huang <huangqiwu@xiaomi.com>
Subject: [PATCH v4 3/4] power: supply: core: add wireless signal strength property
Date: Mon, 20 Jul 2020 13:47:16 +0800
Message-ID: <b9ee0342005957e2096b6d63eb5752cb3e1e3cc6.1595214246.git.huangqiwu@xiaomi.com> (raw)
In-Reply-To: <cover.1595214246.git.huangqiwu@xiaomi.com>

From: Qiwu Huang <huangqiwu@xiaomi.com>

reports wireless signal strength.
The value show degree of coupling between tx and rx.

Signed-off-by: Qiwu Huang <huangqiwu@xiaomi.com>
---
 Documentation/ABI/testing/sysfs-class-power | 10 ++++++++++
 drivers/power/supply/power_supply_sysfs.c   |  1 +
 include/linux/power_supply.h                |  1 +
 3 files changed, 12 insertions(+)

diff --git a/Documentation/ABI/testing/sysfs-class-power b/Documentation/ABI/testing/sysfs-class-power
index 03ab449fae8a..75ec7de2fe78 100644
--- a/Documentation/ABI/testing/sysfs-class-power
+++ b/Documentation/ABI/testing/sysfs-class-power
@@ -757,3 +757,13 @@ Description:
 			13: ADAPTER_VOICE_BOX,
 			14: ADAPTER_PRIVATE_PD_50W.
 
+What:		/sys/class/power_supply/<supply_name>/signal_strength
+Date:		Jul 2020
+Contact:	Fei Jiang <jiangfei1@xiaomi.com>
+Description:
+		In PING phase, RX transmits a signal strength packet as the first
+		communication packet to instruct the base to keep power signal on.
+		The value reports wireless signal strength and show degree of coupling.
+
+		Access: Read-Only
+		Valid values: 0 - 100
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 0bbdec1630a4..346c6c9c0737 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


  parent reply index

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-20  5:47 [PATCH v4 0/4] add some power supply properties about wireless/wired charging Qiwu Huang
2020-07-20  5:47 ` [PATCH v4 1/4] power: supply: core: add quick charge type property Qiwu Huang
2020-08-02 12:00   ` Pavel Machek
2020-08-02 12:37     ` Greg KH
2020-08-02 14:28       ` Pavel Machek
2020-08-02 16:57         ` Greg KH
2020-08-03 11:49           ` Sebastian Reichel
2020-08-03 11:56             ` Greg KH
2020-08-04  2:11               ` ivan
2020-08-04  7:49                 ` Greg KH
2020-07-20  5:47 ` [PATCH v4 2/4] power: supply: core: add wireless charger adapter " Qiwu Huang
2020-07-20  5:47 ` Qiwu Huang [this message]
2020-07-20  5:47 ` [PATCH v4 4/4] power: supply: core: property to control reverse charge Qiwu Huang
2020-07-20  8:21 ` [PATCH v4 0/4] add some power supply properties about wireless/wired charging Greg KH
2020-07-21  3:12   ` ivan

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