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Signed-off-by: Mike Looijmans --- (no changes since v1) Documentation/devicetree/bindings/power/supply/battery.yaml | 1 + 1 file changed, 1 insertion(+) diff --git a/Documentation/devicetree/bindings/power/supply/battery.yaml b/Documentation/devicetree/bindings/power/supply/battery.yaml index 491488e7b970..a22c97dfad88 100644 --- a/Documentation/devicetree/bindings/power/supply/battery.yaml +++ b/Documentation/devicetree/bindings/power/supply/battery.yaml @@ -44,6 +44,7 @@ properties: - const: lithium-ion-polymer - const: lithium-ion-iron-phosphate - const: lithium-ion-manganese-oxide + - const: capacitor over-voltage-threshold-microvolt: description: battery over-voltage limit From patchwork Tue Apr 16 12:18:15 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Looijmans X-Patchwork-Id: 789675 Received: from EUR03-DBA-obe.outbound.protection.outlook.com (mail-dbaeur03on2107.outbound.protection.outlook.com [40.107.104.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5C43712C465; 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Signed-off-by: Mike Looijmans --- (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//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, }; 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DIR:OUT; SFP:1102; X-OriginatorOrg: topic.nl X-MS-Exchange-CrossTenant-OriginalArrivalTime: 16 Apr 2024 12:18:33.0597 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 269eaed1-4f6f-4814-f119-08dc5e0f5570 X-MS-Exchange-CrossTenant-Id: 449607a5-3517-482d-8d16-41dd868cbda3 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=449607a5-3517-482d-8d16-41dd868cbda3; Ip=[40.69.19.60]; Helo=[westeu100-emailsignatures-cloud.codetwo.com] X-MS-Exchange-CrossTenant-AuthSource: DB5PEPF00014B9B.eurprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: AS8PR04MB8610 The LTC3350 is a backup power controller that can charge and monitor a series stack of one to four supercapacitors. Signed-off-by: Mike Looijmans Reviewed-by: Krzysztof Kozlowski --- (no changes since v3) Changes in v3: Fix $id after rename to lltc,ltc3350.yaml Changes in v2: Rename to lltc,ltc3350.yaml Fix spaces and indentation .../bindings/power/supply/lltc,ltc3350.yaml | 54 +++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 Documentation/devicetree/bindings/power/supply/lltc,ltc3350.yaml diff --git a/Documentation/devicetree/bindings/power/supply/lltc,ltc3350.yaml b/Documentation/devicetree/bindings/power/supply/lltc,ltc3350.yaml new file mode 100644 index 000000000000..dca7fe0f0d8f --- /dev/null +++ b/Documentation/devicetree/bindings/power/supply/lltc,ltc3350.yaml @@ -0,0 +1,54 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +# Copyright (C) 2024 Topic Embedded Products +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/power/supply/lltc,ltc3350.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Linear Technology (Analog Devices) LTC3350 Supercap Charger + +maintainers: + - Mike Looijmans + +description: | + The LTC3350 is a High Current Supercapacitor Backup Controller and System + Monitor. + Specifications about the charger can be found at: + https://www.analog.com/en/products/ltc3350.html + +properties: + compatible: + enum: + - lltc,ltc3350 + + reg: + maxItems: 1 + + lltc,rsnsc-micro-ohms: + description: Capacitor charger sense resistor in microohm. + minimum: 1000 + + lltc,rsnsi-micro-ohms: + description: Input current sense resistor in microohm. + minimum: 1000 + +required: + - compatible + - reg + - lltc,rsnsc-micro-ohms + - lltc,rsnsi-micro-ohms + +additionalProperties: false + +examples: + - | + i2c { + #address-cells = <1>; + #size-cells = <0>; + charger: battery-charger@9 { + compatible = "lltc,ltc3350"; + reg = <0x9>; + lltc,rsnsc-micro-ohms = <10000>; + lltc,rsnsi-micro-ohms = <10000>; + }; + };