From patchwork Fri Oct 19 10:53:12 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: 10648981 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 848AD15E2 for ; Fri, 19 Oct 2018 10:53:49 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 71C9928A3F for ; Fri, 19 Oct 2018 10:53:49 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 65DAC28A68; Fri, 19 Oct 2018 10:53:49 +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 0038928A3F for ; Fri, 19 Oct 2018 10:53:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727178AbeJSS7O (ORCPT ); Fri, 19 Oct 2018 14:59:14 -0400 Received: from mail-pf1-f194.google.com ([209.85.210.194]:44416 "EHLO mail-pf1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727182AbeJSS7N (ORCPT ); Fri, 19 Oct 2018 14:59:13 -0400 Received: by mail-pf1-f194.google.com with SMTP id r9-v6so16314965pff.11 for ; Fri, 19 Oct 2018 03:53:41 -0700 (PDT) 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=IZj3v1SW4CS/dfK2+z6yc+Dtbx1/tbGykpj1YfOFLRk=; b=jCj+8VG6l9AH69XTMJY6zE7PAKm5zlf0reQKiCaZ1hl8Kp4Sl3zhyQsCny4/2NKwsF 59hmweq5vwTIziFMfW91uNvtuCab873/lRepjzYeUa/pntNEwmTl9/tikYDXei/M7t7L NFyFyVlnShPTMsEZ2j0W/ySwz+0OT558UEFrk= 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=IZj3v1SW4CS/dfK2+z6yc+Dtbx1/tbGykpj1YfOFLRk=; b=KDodx5QRPEnEqmKvt1NQV/gczUC0VsnpRVOR+kEswlzEfXathLn2K0OVmZcHbbGtzp GYnV0RG6ZR/RQcN8rFUC4bTifna5AuVtNLEoxSKMrsu5Sd/ZEVOdBs+H/soO7yrds3vU tDKHY6N4MB3k0QZzcRoXG9EGnecBW+jzLRmkCUTqf3KlWUYllRgxlTtt9ONip9jUt0N/ zMFgkLaLgTWBBbVb7sbtTrvXuMAtpYymeoYY65bT3/hcjrsYCUCVNgwMqmlZUNwTa9HL 95w6RtLyJBFT01pvRJnPDedMe/MxSSHaAHPs7/pzdAdQboCKqohrjST71Fy3AVHSXTLI hA5Q== X-Gm-Message-State: ABuFfoggB+Etpyfcou+Z7isWcDOS7DRiteOrI52yOZp1ZSxCvIXJWCr1 +orjjqtr5Gd8FAR3QvpcwidyEA== X-Google-Smtp-Source: ACcGV61tMCkRgEcT5aSyJ8UrybeW3M7ookoRIUjQoeeWW+T+3Cs1c1LR3/Sq4JUGNwVQmhD8lDXdYg== X-Received: by 2002:a63:cc:: with SMTP id 195-v6mr31477894pga.44.1539946420740; Fri, 19 Oct 2018 03:53:40 -0700 (PDT) Received: from baolinwangubtpc.spreadtrum.com ([117.18.48.102]) by smtp.gmail.com with ESMTPSA id m67-v6sm54918pfm.13.2018.10.19.03.53.37 (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Fri, 19 Oct 2018 03:53:39 -0700 (PDT) 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 Subject: [PATCH v5 3/6] dt-bindings: power: Introduce properties to present the battery OCV capacity table Date: Fri, 19 Oct 2018 18:53:12 +0800 Message-Id: <3a0c6487c9503cf64432f630e65790cc5c3f70ab.1539915051.git.baolin.wang@linaro.org> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: References: In-Reply-To: References: 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 --- 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 {