From patchwork Mon Nov 5 07:39:08 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "(Exiting) Baolin Wang" X-Patchwork-Id: 10667513 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8515C17D5 for ; Mon, 5 Nov 2018 07:39:40 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 72449295A8 for ; Mon, 5 Nov 2018 07:39:40 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 65AE0295D8; Mon, 5 Nov 2018 07:39:40 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id F1F10295A8 for ; Mon, 5 Nov 2018 07:39:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729496AbeKEQ56 (ORCPT ); Mon, 5 Nov 2018 11:57:58 -0500 Received: from mail-pl1-f193.google.com ([209.85.214.193]:41453 "EHLO mail-pl1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729585AbeKEQ56 (ORCPT ); Mon, 5 Nov 2018 11:57:58 -0500 Received: by mail-pl1-f193.google.com with SMTP id p16-v6so4024235plr.8 for ; Sun, 04 Nov 2018 23:39:38 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :in-reply-to:references; bh=t6P0NC6uUx2aJ/BT8V+UjrWtOm+Y+ZsbL1DmEhfJd1w=; b=P9Fcj1yMgv+H8w+PhmoxV9IUi+jlJEKDkzB0NP8CoZq7+EoCOjuA9hU7JEgzEr+lBV OsUCPJTuHtO8TOHuCCU6TaQiGXvBSLdWnlJrts1iPWrnBnLEdOVLQZLnFhOHdtUaHHAH LlpieYeQ1RQg8lEtiuDA7fVYfaSOWk+CyuSrs= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:in-reply-to:references; bh=t6P0NC6uUx2aJ/BT8V+UjrWtOm+Y+ZsbL1DmEhfJd1w=; b=dxOCaWqEouJ+CDKrsReQXePW1MiIA310TmPOSJ+REVgM3zBLdlM+2WRgbk7qMYTzwG kpHIwT7RmZr3w1gZ29u8hwaxMYBlPgK1q/cVWNRrw5L+PqIs3L0BM2cpRSvk2ZS0EQIa XDkYNaRHciwyLM4EQQOWWK2so9j2/auFEHqDn6eCXsE5KgOqTBkRn+rpdZxUd4QoFHjn +5ti6+gfngbq60wgYzOz7UVJlmpyRA+IfnD4Rqnv8cIGgFzGnLXFt/wPzlpcOLW/K3VE KLolZSIWPdyns7Vp+fsfKAjCZEkYZ5NZy+njSItg9GJ4Uwb0bzyu9YhsQlbLiCfwitKx bHUA== X-Gm-Message-State: AGRZ1gIc0YDcZmnIAlnsRugja2zxg8hNMW3ErW7S3bqpgwak978Xyg/b Q1pR39g2Bsc2K9HE1Y8Qi8G44A== X-Google-Smtp-Source: AJdET5eTd6Glc2JTxCT2r94YCHS8YelIxQCK23dGREZNPmacgpOy9MUuKoFKwDezXCIg8mj9859dOg== X-Received: by 2002:a17:902:9b84:: with SMTP id y4-v6mr21299643plp.332.1541403578182; Sun, 04 Nov 2018 23:39:38 -0800 (PST) Received: from baolinwangubtpc.spreadtrum.com ([117.18.48.102]) by smtp.gmail.com with ESMTPSA id d5-v6sm27632040pfo.131.2018.11.04.23.39.34 (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Sun, 04 Nov 2018 23:39:37 -0800 (PST) From: Baolin Wang To: sre@kernel.org, robh+dt@kernel.org, mark.rutland@arm.com Cc: linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, yuanjiang.yu@unisoc.com, baolin.wang@linaro.org, broonie@kernel.org, ctatlor97@gmail.com, linus.walleij@linaro.org, quentin.schulz@bootlin.com Subject: [PATCH v7 3/6] dt-bindings: power: Introduce properties to present the battery OCV capacity table Date: Mon, 5 Nov 2018 15:39:08 +0800 Message-Id: X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <5640f29e0b7f46f9ee77d80745f8c93eda355c34.1541393063.git.baolin.wang@linaro.org> References: <5640f29e0b7f46f9ee77d80745f8c93eda355c34.1541393063.git.baolin.wang@linaro.org> In-Reply-To: <5640f29e0b7f46f9ee77d80745f8c93eda355c34.1541393063.git.baolin.wang@linaro.org> References: <5640f29e0b7f46f9ee77d80745f8c93eda355c34.1541393063.git.baolin.wang@linaro.org> Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Some battery driver will use the open circuit voltage (OCV) value to look up the corresponding battery capacity percent in one certain degree Celsius. Thus this patch provides some battery properties to present the OCV table temperatures and OCV capacity table values. Suggested-by: Sebastian Reichel Signed-off-by: Baolin Wang Reviewed-by: Linus Walleij Reviewed-by: Rob Herring --- Changes from v6: - Add reviewed tag from Rob. Changes from v5: - None. Changes from v4: - Improve the description of ocv-capacity-table-n to make the order clear. Changes from v3: - Split binding into one separate patch. - Rename ocv-capacity-table-temperatures to ocv-capacity-celsius. - Add some words to specify the OCV's unit. Changes from v2: - Use type __be32 to calculate the table length. - Update error messages. - Add some helper functions. Changes from v1: - New patch in v2. --- .../devicetree/bindings/power/supply/battery.txt | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/Documentation/devicetree/bindings/power/supply/battery.txt b/Documentation/devicetree/bindings/power/supply/battery.txt index 938d027..89871ab 100644 --- a/Documentation/devicetree/bindings/power/supply/battery.txt +++ b/Documentation/devicetree/bindings/power/supply/battery.txt @@ -23,6 +23,17 @@ Optional Properties: - constant-charge-current-max-microamp: maximum constant input current - constant-charge-voltage-max-microvolt: maximum constant input voltage - factory-internal-resistance-micro-ohms: battery factory internal resistance + - ocv-capacity-table-0: An array providing the open circuit voltage (OCV) + of the battery and corresponding battery capacity percent, which is used + to look up battery capacity according to current OCV value. And the open + circuit voltage unit is microvolt. + - ocv-capacity-table-1: Same as ocv-capacity-table-0 + ...... + - ocv-capacity-table-n: Same as ocv-capacity-table-0 + - ocv-capacity-celsius: An array containing the temperature in degree Celsius, + for each of the battery capacity lookup table. The first temperature value + specifies the OCV table 0, and the second temperature value specifies the + OCV table 1, and so on. Battery properties are named, where possible, for the corresponding elements in enum power_supply_property, defined in @@ -44,6 +55,10 @@ Example: constant-charge-current-max-microamp = <900000>; constant-charge-voltage-max-microvolt = <4200000>; factory-internal-resistance-micro-ohms = <250000>; + ocv-capacity-celsius = <(-10) 0 10>; + ocv-capacity-table-0 = <4185000 100>, <4113000 95>, <4066000 90>, ...; + ocv-capacity-table-1 = <4200000 100>, <4185000 95>, <4113000 90>, ...; + ocv-capacity-table-2 = <4250000 100>, <4200000 95>, <4185000 90>, ...; }; charger: charger@11 {