From patchwork Tue Nov 3 08:37:06 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Mike Looijmans X-Patchwork-Id: 315232 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8129DC2D0A3 for ; Tue, 3 Nov 2020 08:37:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 301D622400 for ; Tue, 3 Nov 2020 08:37:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727512AbgKCIhN (ORCPT ); Tue, 3 Nov 2020 03:37:13 -0500 Received: from jax4mhob17.registeredsite.com ([64.69.218.105]:33684 "EHLO jax4mhob17.registeredsite.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727470AbgKCIhM (ORCPT ); Tue, 3 Nov 2020 03:37:12 -0500 Received: from mailpod.hostingplatform.com ([10.30.71.204]) by jax4mhob17.registeredsite.com (8.14.4/8.14.4) with ESMTP id 0A38b9Y0128883 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL) for ; Tue, 3 Nov 2020 03:37:09 -0500 Received: (qmail 20239 invoked by uid 0); 3 Nov 2020 08:37:09 -0000 X-TCPREMOTEIP: 83.128.90.119 X-Authenticated-UID: mike@milosoftware.com Received: from unknown (HELO phenom.domain?not?set.invalid) (mike@milosoftware.com@83.128.90.119) by 0 with ESMTPA; 3 Nov 2020 08:37:09 -0000 From: Mike Looijmans To: devicetree@vger.kernel.org, linux-pm@vger.kernel.org Cc: linux-kernel@vger.kernel.org, sre@kernel.org, robh+dt@kernel.org, Mike Looijmans Subject: [PATCH v4] dt-bindings: power/supply: Add ltc4162-l-charger Date: Tue, 3 Nov 2020 09:37:06 +0100 Message-Id: <20201103083706.29380-1-mike.looijmans@topic.nl> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Add support for the LTC4162-L Li-Ion battery charger. The driver allows reading back telemetry and to set some charging options like the input current limit. This adds the devicetree bindings. Signed-off-by: Mike Looijmans Reviewed-by: Rob Herring --- v2: Use microohms, add lltc,cell-count v3: Fix example dts to match description v4: Update "required" list to include micro-ohms .../bindings/power/supply/ltc4162-l.yaml | 69 +++++++++++++++++++ 1 file changed, 69 insertions(+) create mode 100644 Documentation/devicetree/bindings/power/supply/ltc4162-l.yaml diff --git a/Documentation/devicetree/bindings/power/supply/ltc4162-l.yaml b/Documentation/devicetree/bindings/power/supply/ltc4162-l.yaml new file mode 100644 index 000000000000..1f88c9e013f4 --- /dev/null +++ b/Documentation/devicetree/bindings/power/supply/ltc4162-l.yaml @@ -0,0 +1,69 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +# Copyright (C) 2020 Topic Embedded Products +%YAML 1.2 +--- +$id: "http://devicetree.org/schemas/power/supply/ltc4162-l.yaml#" +$schema: "http://devicetree.org/meta-schemas/core.yaml#" + +title: Linear Technology (Analog Devices) LTC4162-L Charger + +maintainers: + - Mike Looijmans + +description: | + The LTC ® 4162-L is an advanced monolithic synchronous step-down switching + battery charger and PowerPath (TM) manager that seamlessly manages power + distribution between input sources such as wall adapters, backplanes, solar + panels, etc., and a rechargeable Lithium-Ion/Polymer battery. + + Specifications about the charger can be found at: + https://www.analog.com/en/products/ltc4162-s.html + +properties: + compatible: + enum: + - lltc,ltc4162-l + + reg: + maxItems: 1 + description: I2C address of the charger. + + lltc,rsnsb-micro-ohms: + $ref: /schemas/types.yaml#/definitions/uint32 + description: Battery sense resistor in microohm. + minimum: 1000 + + lltc,rsnsi-micro-ohms: + $ref: /schemas/types.yaml#/definitions/uint32 + description: Input current sense resistor in microohm. + minimum: 1000 + + lltc,cell-count: + $ref: /schemas/types.yaml#/definitions/uint32 + description: | + Number of battery cells. If not provided, will be obtained from the chip + once the external power is applied. Omit this when the number of cells + is somewhat dynamic. Without it, several measurements will return 0 until + the charger is connected to an external supply. + +required: + - compatible + - reg + - lltc,rsnsb-micro-ohms + - lltc,rsnsi-micro-ohms + +additionalProperties: false + +examples: + - | + i2c0 { + #address-cells = <1>; + #size-cells = <0>; + charger: battery-charger@68 { + compatible = "lltc,ltc4162-l"; + reg = <0x68>; + lltc,rsnsb-micro-ohms = <10000>; + lltc,rsnsi-micro-ohms = <16000>; + lltc,cell-count = <2>; + }; + };