linux-kernel - [PATCH v5 2/5] power: supply: core: Add POWER_SUPPLY_TECHNOLOGY

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Date: Tue, 16 Apr 2024 14:18:15 +0200
From: Mike Looijmans <mike.looijmans@...ic.nl>
To: linux-pm@...r.kernel.org
CC: Mike Looijmans <mike.looijmans@...ic.nl>,
	Sebastian Reichel <sre@...nel.org>,
	Shuah Khan <shuah@...nel.org>,
	linux-kernel@...r.kernel.org,
	linux-kselftest@...r.kernel.org
Subject: [PATCH v5 2/5] power: supply: core: Add POWER_SUPPLY_TECHNOLOGY_CAPACITOR

Another technology to store energy is a (super)capacitor.

Signed-off-by: Mike Looijmans <mike.looijmans@...ic.nl>
---

(no changes since v1)

 Documentation/ABI/testing/sysfs-class-power                     | 2 +-
 drivers/power/supply/power_supply_core.c                        | 2 ++
 drivers/power/supply/power_supply_sysfs.c                       | 1 +
 include/linux/power_supply.h                                    | 1 +
 .../selftests/power_supply/test_power_supply_properties.sh      | 2 +-
 5 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/Documentation/ABI/testing/sysfs-class-power b/Documentation/ABI/testing/sysfs-class-power
index 7c81f0a25a48..1f6a04a17c81 100644
--- a/Documentation/ABI/testing/sysfs-class-power
+++ b/Documentation/ABI/testing/sysfs-class-power
@@ -488,7 +488,7 @@ Description:
 
 		Valid values:
 			      "Unknown", "NiMH", "Li-ion", "Li-poly", "LiFe",
-			      "NiCd", "LiMn"
+			      "NiCd", "LiMn", "Capacitor"
 
 
 What:		/sys/class/power_supply/<supply_name>/voltage_avg,
diff --git a/drivers/power/supply/power_supply_core.c b/drivers/power/supply/power_supply_core.c
index fefe938c9342..6d1327e16ff6 100644
--- a/drivers/power/supply/power_supply_core.c
+++ b/drivers/power/supply/power_supply_core.c
@@ -686,6 +686,8 @@ int power_supply_get_battery_info(struct power_supply *psy,
 			info->technology = POWER_SUPPLY_TECHNOLOGY_LiFe;
 		else if (!strcmp("lithium-ion-manganese-oxide", value))
 			info->technology = POWER_SUPPLY_TECHNOLOGY_LiMn;
+		else if (!strcmp("capacitor", value))
+			info->technology = POWER_SUPPLY_TECHNOLOGY_CAPACITOR;
 		else
 			dev_warn(&psy->dev, "%s unknown battery type\n", value);
 	}
diff --git a/drivers/power/supply/power_supply_sysfs.c b/drivers/power/supply/power_supply_sysfs.c
index 0d2c3724d0bc..9d8540ce1f7e 100644
--- a/drivers/power/supply/power_supply_sysfs.c
+++ b/drivers/power/supply/power_supply_sysfs.c
@@ -119,6 +119,7 @@ static const char * const POWER_SUPPLY_TECHNOLOGY_TEXT[] = {
 	[POWER_SUPPLY_TECHNOLOGY_LiFe]		= "LiFe",
 	[POWER_SUPPLY_TECHNOLOGY_NiCd]		= "NiCd",
 	[POWER_SUPPLY_TECHNOLOGY_LiMn]		= "LiMn",
+	[POWER_SUPPLY_TECHNOLOGY_CAPACITOR]	= "Capacitor",
 };
 
 static const char * const POWER_SUPPLY_CAPACITY_LEVEL_TEXT[] = {
diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h
index 8e5705a56b85..af5a4e700881 100644
--- a/include/linux/power_supply.h
+++ b/include/linux/power_supply.h
@@ -78,6 +78,7 @@ enum {
 	POWER_SUPPLY_TECHNOLOGY_LiFe,
 	POWER_SUPPLY_TECHNOLOGY_NiCd,
 	POWER_SUPPLY_TECHNOLOGY_LiMn,
+	POWER_SUPPLY_TECHNOLOGY_CAPACITOR,
 };
 
 enum {
diff --git a/tools/testing/selftests/power_supply/test_power_supply_properties.sh b/tools/testing/selftests/power_supply/test_power_supply_properties.sh
index df272dfe1d2a..75f801eb86af 100755
--- a/tools/testing/selftests/power_supply/test_power_supply_properties.sh
+++ b/tools/testing/selftests/power_supply/test_power_supply_properties.sh
@@ -74,7 +74,7 @@ for DEVNAME in $supplies; do
 	test_sysfs_prop_optional model_name
 	test_sysfs_prop_optional manufacturer
 	test_sysfs_prop_optional serial_number
-	test_sysfs_prop_optional_list technology "Unknown","NiMH","Li-ion","Li-poly","LiFe","NiCd","LiMn"
+	test_sysfs_prop_optional_list technology "Unknown","NiMH","Li-ion","Li-poly","LiFe","NiCd","LiMn","Capacitor"
 
 	test_sysfs_prop_optional cycle_count
 
-- 
2.34.1


Met vriendelijke groet / kind regards,

Mike Looijmans
System Expert


TOPIC Embedded Products B.V.
Materiaalweg 4, 5681 RJ Best
The Netherlands

T: +31 (0) 499 33 69 69
E: mike.looijmans@...ic.nl
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