linux-kernel - [PATCH v2 2/3] power: supply: core: add POWER_SUPPLY_HEALTH_NO

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Message-Id: <20211108162706.2816454-2-luca@lucaceresoli.net>
Date:   Mon,  8 Nov 2021 17:27:05 +0100
From:   Luca Ceresoli <luca@...aceresoli.net>
To:     linux-pm@...r.kernel.org
Cc:     Luca Ceresoli <luca@...aceresoli.net>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Sebastian Reichel <sre@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Randy Dunlap <rdunlap@...radead.org>,
        Sebastian Reichel <sebastian.reichel@...labora.com>
Subject: [PATCH v2 2/3] power: supply: core: add POWER_SUPPLY_HEALTH_NO_BATTERY

Some chargers can keep the system powered from the mains even when no
battery is present. It this case none of the currently defined health
statuses applies. Add a new status to report that no battery is present.

Suggested-by: Sebastian Reichel <sebastian.reichel@...labora.com>
Signed-off-by: Luca Ceresoli <luca@...aceresoli.net>

---

This patch is new in v2.
---
 Documentation/ABI/testing/sysfs-class-power | 2 +-
 drivers/power/supply/power_supply_sysfs.c   | 1 +
 include/linux/power_supply.h                | 1 +
 3 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/Documentation/ABI/testing/sysfs-class-power b/Documentation/ABI/testing/sysfs-class-power
index f7904efc4cfa..a0b2a4280e38 100644
--- a/Documentation/ABI/testing/sysfs-class-power
+++ b/Documentation/ABI/testing/sysfs-class-power
@@ -413,7 +413,7 @@ Description:
 			      "Over voltage", "Unspecified failure", "Cold",
 			      "Watchdog timer expire", "Safety timer expire",
 			      "Over current", "Calibration required", "Warm",
-			      "Cool", "Hot"
+			      "Cool", "Hot", "No battery"
 
 What:		/sys/class/power_supply/<supply_name>/precharge_current
 Date:		June 2017
diff --git a/drivers/power/supply/power_supply_sysfs.c b/drivers/power/supply/power_supply_sysfs.c
index c3d7cbcd4fad..6ac88fbee3cb 100644
--- a/drivers/power/supply/power_supply_sysfs.c
+++ b/drivers/power/supply/power_supply_sysfs.c
@@ -106,6 +106,7 @@ static const char * const POWER_SUPPLY_HEALTH_TEXT[] = {
 	[POWER_SUPPLY_HEALTH_WARM]		    = "Warm",
 	[POWER_SUPPLY_HEALTH_COOL]		    = "Cool",
 	[POWER_SUPPLY_HEALTH_HOT]		    = "Hot",
+	[POWER_SUPPLY_HEALTH_NO_BATTERY]	    = "No battery",
 };
 
 static const char * const POWER_SUPPLY_TECHNOLOGY_TEXT[] = {
diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h
index 9ca1f120a211..2d1318fe2455 100644
--- a/include/linux/power_supply.h
+++ b/include/linux/power_supply.h
@@ -66,6 +66,7 @@ enum {
 	POWER_SUPPLY_HEALTH_WARM,
 	POWER_SUPPLY_HEALTH_COOL,
 	POWER_SUPPLY_HEALTH_HOT,
+	POWER_SUPPLY_HEALTH_NO_BATTERY,
 };
 
 enum {
-- 
2.25.1