From patchwork Mon Oct 15 08:09:20 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: 148808 Delivered-To: patch@linaro.org Received: by 2002:a2e:8595:0:0:0:0:0 with SMTP id b21-v6csp3507295lji; Mon, 15 Oct 2018 01:10:40 -0700 (PDT) X-Google-Smtp-Source: ACcGV61i22V08Q434FhAGv/F4QjYsMuLMTWIy+rjcyWhPZ1ZtfThL0FqBfSCzK1VApbgHkbOCNTb X-Received: by 2002:a17:902:a509:: with SMTP id s9-v6mr159593plq.323.1539591040663; Mon, 15 Oct 2018 01:10:40 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1539591040; cv=none; d=google.com; s=arc-20160816; b=NP+q4cB2ugMqpguFMXBrUxmGqm0/qW2nKMwaesP2faktUs08a4Hs1ZoNhpGaphUlsM 2hBtGUhwHjyLR3hqFoCEuXb8FuunnGe/cO+4DTDXl2D7axME6RXySLNTclapKNrXMZCy EA3wTCjkuJ/7YHcdfNhSrtRNhqNjT9yIpyjDEhcNF6QQpLC3UhxCTCw0ffXZbJOZOnEq oOJun8lo63/gMBPQmU2u4NYAUvHqNrUxMBHUC9eg+rZwHC8YHxEE6U8S7R3KNb3egGo5 4hv9p+7aVQFCeJMexZEjh+eQ7UT9a6kIUbmYfWda7spE4sb169cl+AfC8xxGwhghf3/L izFQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:message-id:date:subject:cc:to:from :dkim-signature; bh=qHyP6TsbxwsK1CWpa8UGFv4TSz40JyDBtFelVTbFr7I=; b=SnBZJeAPyKEYuKg3F0gI+ZehSk0h0Y9Frs98rb0BI1/v/INIHgqHhtPaPoJRGb7e0P vroKd7+t+N5QH2v81iU+ENniIBiGmNxiwBjSXga7ak4jKYkd6fMudfKtPctu86FFl9Bm zfpjaVg3eq0S6pHZraf2+sTLhI4IBKIb5mykJ3drDdYVgSy7Ad6NsiQlQQAp220iwA3j aFRgbAV3GPrU3bR6r3/X1h/X664NV3OcOkQLvQt+xRrXwPpUOoa0FGiTpENhnSw1SAW3 PQUmli6XPmBk/WMnmkmHzuEXBbNGy3/yO483BrG0QwTjWt/qyx59WxAcrFvSutJW7+g4 +T3A== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=ftQgyFOo; spf=pass (google.com: best guess record for domain of linux-pm-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-pm-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id z11-v6si9854958pgo.470.2018.10.15.01.10.39; Mon, 15 Oct 2018 01:10:40 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-pm-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=ftQgyFOo; spf=pass (google.com: best guess record for domain of linux-pm-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-pm-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726571AbeJOPys (ORCPT + 10 others); Mon, 15 Oct 2018 11:54:48 -0400 Received: from mail-pg1-f196.google.com ([209.85.215.196]:34170 "EHLO mail-pg1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726599AbeJOPys (ORCPT ); Mon, 15 Oct 2018 11:54:48 -0400 Received: by mail-pg1-f196.google.com with SMTP id g12-v6so8795086pgs.1 for ; Mon, 15 Oct 2018 01:10:37 -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; bh=qHyP6TsbxwsK1CWpa8UGFv4TSz40JyDBtFelVTbFr7I=; b=ftQgyFOo5C0d/7+jFBQZD2G+oul+jXzsiTdvXYmVE6J5cWMwQfXS5Nz6LAxwF/Py9S GiGCyO+Zz6AJ9XK5tMyKt8AsMIgKGIxDZ5Xm9RilBApC8ABgjV6VvKcRfkmFKxKI7AFx xIz0N04MGPGvP4KfnDRMqCd3G74K2zamCMvBU= 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; bh=qHyP6TsbxwsK1CWpa8UGFv4TSz40JyDBtFelVTbFr7I=; b=Z+3vXNWFOzOOi0wf3EExJDBpc4s6KCpWrDu4h0tlQMuVSSbUw9Aj0/RYvao1g/QEfx JFABzM0bvEjGS+1MbkAaiKLxLv6hOdy7+Ss+R/YDuxp3dZ/nH7Rfb/RQCGiXYITFcEJ/ JrNHF5HU3eW4cCNIG3S4C8UYbpTB/+ie6xoKuc9viXtN+Uja5fCwnnuenGBGMRhBEOP7 gEF9iauykq9+4OhU2YwhUW7e7mFeb2tH6TqGGR0zDSNDLh5JQKI0Q0veCYko9v6Fjt+5 NVRMVNHjFVzPrP6dbkQ2Sn/Mqz8VB/qJguT5qC7TxyT5hnf8Qid1JjQ4iPEQ3OWQDUMF kSMQ== X-Gm-Message-State: ABuFfoj6XwY2RYjR7Bp31WYC9zf3ge/qNOtL9hvO6PgWqf86E1962pVa qJXCQyAYJAgVWYqclY8pEBlTxw== X-Received: by 2002:a63:1c1b:: with SMTP id c27-v6mr15233801pgc.351.1539591037343; Mon, 15 Oct 2018 01:10:37 -0700 (PDT) Received: from baolinwangubtpc.spreadtrum.com ([117.18.48.102]) by smtp.gmail.com with ESMTPSA id m27-v6sm16375855pff.187.2018.10.15.01.10.33 (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 15 Oct 2018 01:10:36 -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 v4 1/6] dt-bindings: power: Introduce one property to present the battery internal resistance Date: Mon, 15 Oct 2018 16:09:20 +0800 Message-Id: X-Mailer: git-send-email 1.7.9.5 Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org The internal resistance of a battery is not a constant in its life cycle, this varies over the age of the battery or temperature and so on. But we just want use one constant battery internal resistance to estimate the battery capacity. Thus this patch introduces one property to present the battery factory internal resistance for battery information. Signed-off-by: Baolin Wang Reviewed-by: Linus Walleij --- Changes from v3: - Split binding into one separate patch. - Add LinusW reviewed tag. Changes from v2: - Rename the property. - Improve the commit message. Changes from v1: - New patch in v2. --- .../devicetree/bindings/power/supply/battery.txt | 2 ++ 1 file changed, 2 insertions(+) -- 1.7.9.5 diff --git a/Documentation/devicetree/bindings/power/supply/battery.txt b/Documentation/devicetree/bindings/power/supply/battery.txt index f4d3b4a..938d027 100644 --- a/Documentation/devicetree/bindings/power/supply/battery.txt +++ b/Documentation/devicetree/bindings/power/supply/battery.txt @@ -22,6 +22,7 @@ Optional Properties: - charge-term-current-microamp: current for charge termination phase - 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 Battery properties are named, where possible, for the corresponding elements in enum power_supply_property, defined in @@ -42,6 +43,7 @@ Example: charge-term-current-microamp = <128000>; constant-charge-current-max-microamp = <900000>; constant-charge-voltage-max-microvolt = <4200000>; + factory-internal-resistance-micro-ohms = <250000>; }; charger: charger@11 { From patchwork Mon Oct 15 08:09:23 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: 148811 Delivered-To: patch@linaro.org Received: by 2002:a2e:8595:0:0:0:0:0 with SMTP id b21-v6csp3507428lji; Mon, 15 Oct 2018 01:10:52 -0700 (PDT) X-Google-Smtp-Source: ACcGV604ltxlrg6H4sOT++ctJp3IzjDNqlZpKjX5mE4d4HTZ4AmMkszNtXCSvbgMzNi0o1tK4sTn X-Received: by 2002:a63:a612:: with SMTP id t18-v6mr14861086pge.338.1539591052063; Mon, 15 Oct 2018 01:10:52 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1539591052; cv=none; d=google.com; s=arc-20160816; b=xCjQWMvjtrNhb2kz/t0W4NQPOZEsuNKmFZYAAO1FbtXZ9oYGHEU35e0/uKZkXfedVu 6jTjNTxgxcBv/otUq3Vh+LMDR1ujgmghrupqw+f467tmT4zcuaInefvcIf9bAnL3D9lj SGT4YRmyUc2Z/Wy7l7w+mYz8OpVL8VsSx7cHpBEYTcFrkNDq0PePPsyraVDlHHJkTxSB A1cqWslwMEjiOAMlKBqDXq+lh3YYNd8kGelhv/4x6r3ClmnMP1Wup8aai74HKA9BtyQs 4wYsOQYbT4qxKfGn5nEyu8/NUMZbu41brzJGIsfrbu3RIPs+cs8eX3q6ktqcMwFDgUZV ESuA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:references:in-reply-to:references :in-reply-to:message-id:date:subject:cc:to:from:dkim-signature; bh=cDuzUAuMsnhE9gCbGkSwe4MnMbrTeR2cKrHQa5XyMOI=; b=LTuV2LYQphz7KnC0nN8I5nMBFJ99Uy0AbOqXw33DHa/V5DxENTWhwa6SgRONY4VeCQ Er2a+qJTipOyykf/pazbVaqIdJF2Yg+uPPNxuY4N7vblLR0BCesSIB1XmK+TV3SmjxIZ sGpns2j/llq9v9APcftzWIr8BuKvbNCrFWspDXfF1Yq6YD3oe0ZfMeD0EPxTA3TGc6BJ Yyh2qyajYvWloE4nsLvDlKqwVCKKOVRf3YGV4/bGT7PI3Rxuljr9lnXU9OIq73hlWB5l /OakEdYu/9zTsMr7kWP4+lF5Aq7qEv8TCPj5+N/JrcGjyD8SsJCIBsFAGoPADs35jPhK WEJQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=N0MeuAnx; spf=pass (google.com: best guess record for domain of linux-pm-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-pm-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id v1-v6si10815326pfb.144.2018.10.15.01.10.51; Mon, 15 Oct 2018 01:10:52 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-pm-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=N0MeuAnx; spf=pass (google.com: best guess record for domain of linux-pm-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-pm-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726960AbeJOPzB (ORCPT + 10 others); Mon, 15 Oct 2018 11:55:01 -0400 Received: from mail-pf1-f193.google.com ([209.85.210.193]:33461 "EHLO mail-pf1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726932AbeJOPzA (ORCPT ); Mon, 15 Oct 2018 11:55:00 -0400 Received: by mail-pf1-f193.google.com with SMTP id 78-v6so6898412pfq.0 for ; Mon, 15 Oct 2018 01:10:50 -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=cDuzUAuMsnhE9gCbGkSwe4MnMbrTeR2cKrHQa5XyMOI=; b=N0MeuAnx2m8YE+SUShgCQ2aP9S1Dl9t5jVcilGu0qW4NV7W/JP924mFF5i5eDNSDct YsPwMjPYJL3pIgVkCh7cKQ15nkFlX9hyvdNhwLCq9IzA2ui6sxVKKBDPx3e4gNQCKM2x /1whyC8aovWWYIk+LFSZk/pMNYQToKoRRTYSE= 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=cDuzUAuMsnhE9gCbGkSwe4MnMbrTeR2cKrHQa5XyMOI=; b=C57VAyxVoSk/hGpmjtYFae/tB1wwb2GMk+7pxM79KfNwGBw2Wu4QF5OJ1j3mo/wv4N OHNl2wlkp6juy6e3PeQ81a30+HQPXhbsOMaz82Nn8o87p6MkLcTU80vocHO0Z42UGBJR K+W8Y6Yzzk2I5oMlYkCj/Fb6Mq9MVglZ+uYKuZzTFgcvtU2DQMkJgMmaPbtonrmqVJrJ m5nb5URejoJd035+ihWak4rdKJ0OwWXtEeNmXoQsYLptZPGaILsVFAYlxdcqtTQXgyaF N/Bu71CEDMrguOxexInk+DvQVEiuz5X5i2BwaAdpnNNgWPm0MvdfWnda/3si1HtEyET8 9QXQ== X-Gm-Message-State: ABuFfohdsmeYdTvcUBHBMR/cK4leT9GYBATbNFVwYK0CgMX+v9MsQ/8r IdBZ8trDN1GPs4/FizkdskXNaw== X-Received: by 2002:a63:9855:: with SMTP id l21-v6mr15158714pgo.162.1539591049721; Mon, 15 Oct 2018 01:10:49 -0700 (PDT) Received: from baolinwangubtpc.spreadtrum.com ([117.18.48.102]) by smtp.gmail.com with ESMTPSA id m27-v6sm16375855pff.187.2018.10.15.01.10.45 (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 15 Oct 2018 01:10:48 -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 v4 4/6] power: supply: core: Add some helpers to use the battery OCV capacity table Date: Mon, 15 Oct 2018 16:09:23 +0800 Message-Id: <3bbd08505c0bdbbdfaee6143376044cdf38d0a8e.1539587217.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 We have introduced some battery properties to present the OCV table temperatures and OCV capacity table values. Thus this patch add OCV temperature and OCV table for battery information, as well as providing some helper functions to use the OCV capacity table for users. Signed-off-by: Baolin Wang Reviewed-by: Linus Walleij --- Changes from v3: - Split core modification into one separate patch. - Rename ocv-capacity-table-temperatures to ocv-capacity-celsius. 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. --- drivers/power/supply/power_supply_core.c | 123 +++++++++++++++++++++++++++++- include/linux/power_supply.h | 19 +++++ 2 files changed, 141 insertions(+), 1 deletion(-) -- 1.7.9.5 diff --git a/drivers/power/supply/power_supply_core.c b/drivers/power/supply/power_supply_core.c index 307e0995..58c4309 100644 --- a/drivers/power/supply/power_supply_core.c +++ b/drivers/power/supply/power_supply_core.c @@ -570,7 +570,7 @@ int power_supply_get_battery_info(struct power_supply *psy, { struct device_node *battery_np; const char *value; - int err; + int err, len, index; info->energy_full_design_uwh = -EINVAL; info->charge_full_design_uah = -EINVAL; @@ -581,6 +581,12 @@ int power_supply_get_battery_info(struct power_supply *psy, info->constant_charge_voltage_max_uv = -EINVAL; info->factory_internal_resistance_uohm = -EINVAL; + for (index = 0; index < POWER_SUPPLY_OCV_TEMP_MAX; index++) { + info->ocv_table[index] = NULL; + info->ocv_temp[index] = -EINVAL; + info->ocv_table_size[index] = -EINVAL; + } + if (!psy->of_node) { dev_warn(&psy->dev, "%s currently only supports devicetree\n", __func__); @@ -620,10 +626,125 @@ int power_supply_get_battery_info(struct power_supply *psy, of_property_read_u32(battery_np, "factory-internal-resistance-micro-ohms", &info->factory_internal_resistance_uohm); + len = of_property_count_u32_elems(battery_np, "ocv-capacity-celsius"); + if (len < 0 && len != -EINVAL) { + return len; + } else if (len > POWER_SUPPLY_OCV_TEMP_MAX) { + dev_err(&psy->dev, "Too many temperature values\n"); + return -EINVAL; + } else if (len > 0) { + of_property_read_u32_array(battery_np, "ocv-capacity-celsius", + info->ocv_temp, len); + } + + for (index = 0; index < len; index++) { + struct power_supply_battery_ocv_table *table; + char *propname; + const __be32 *list; + int i, tab_len, size; + + propname = kasprintf(GFP_KERNEL, "ocv-capacity-table-%d", index); + list = of_get_property(battery_np, propname, &size); + if (!list || !size) { + dev_err(&psy->dev, "failed to get %s\n", propname); + kfree(propname); + power_supply_put_battery_info(psy, info); + return -EINVAL; + } + + kfree(propname); + tab_len = size / (2 * sizeof(__be32)); + info->ocv_table_size[index] = tab_len; + + table = info->ocv_table[index] = + devm_kzalloc(&psy->dev, tab_len * sizeof(*table), + GFP_KERNEL); + if (!info->ocv_table[index]) { + power_supply_put_battery_info(psy, info); + return -ENOMEM; + } + + for (i = 0; i < tab_len; i++) { + table[i].ocv = be32_to_cpu(*list++); + table[i].capacity = be32_to_cpu(*list++); + } + } + return 0; } EXPORT_SYMBOL_GPL(power_supply_get_battery_info); +void power_supply_put_battery_info(struct power_supply *psy, + struct power_supply_battery_info *info) +{ + int i; + + for (i = 0; i < POWER_SUPPLY_OCV_TEMP_MAX; i++) + kfree(info->ocv_table[i]); +} +EXPORT_SYMBOL_GPL(power_supply_put_battery_info); + +int power_supply_ocv2cap_simple(struct power_supply_battery_ocv_table *table, + int table_len, int ocv) +{ + int i, cap, tmp; + + for (i = 0; i < table_len; i++) + if (ocv > table[i].ocv) + break; + + if (i > 0 && i < table_len) { + tmp = (table[i - 1].capacity - table[i].capacity) * + (ocv - table[i].ocv); + tmp /= table[i - 1].ocv - table[i].ocv; + cap = tmp + table[i].capacity; + } else if (i == 0) { + cap = table[0].capacity; + } else { + cap = table[table_len - 1].capacity; + } + + return cap; +} +EXPORT_SYMBOL_GPL(power_supply_ocv2cap_simple); + +struct power_supply_battery_ocv_table * +power_supply_find_ocv2cap_table(struct power_supply_battery_info *info, + int temp, int *table_len) +{ + int best_temp_diff = INT_MAX, best_index = 0, temp_diff, i; + + if (!info->ocv_table[0]) + return NULL; + + for (i = 0; i < POWER_SUPPLY_OCV_TEMP_MAX; i++) { + temp_diff = abs(info->ocv_temp[i] - temp); + + if (temp_diff < best_temp_diff) { + best_temp_diff = temp_diff; + best_index = i; + } + } + + *table_len = info->ocv_table_size[best_index]; + return info->ocv_table[best_index]; +} +EXPORT_SYMBOL_GPL(power_supply_find_ocv2cap_table); + +int power_supply_batinfo_ocv2cap(struct power_supply_battery_info *info, + int ocv, int temp) +{ + struct power_supply_battery_ocv_table *table; + int table_len; + + table = power_supply_find_ocv2cap_table(info, temp, &table_len); + if (!table) + return -EINVAL; + + return power_supply_ocv2cap_simple(table, table_len, ocv); +} +EXPORT_SYMBOL_GPL(power_supply_batinfo_ocv2cap); + int power_supply_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h index d089566..84fe93f 100644 --- a/include/linux/power_supply.h +++ b/include/linux/power_supply.h @@ -309,6 +309,13 @@ struct power_supply_info { int use_for_apm; }; +struct power_supply_battery_ocv_table { + int ocv; /* microVolts */ + int capacity; /* percent */ +}; + +#define POWER_SUPPLY_OCV_TEMP_MAX 20 + /* * This is the recommended struct to manage static battery parameters, * populated by power_supply_get_battery_info(). Most platform drivers should @@ -327,6 +334,9 @@ struct power_supply_battery_info { int constant_charge_current_max_ua; /* microAmps */ int constant_charge_voltage_max_uv; /* microVolts */ int factory_internal_resistance_uohm; /* microOhms */ + int ocv_temp[POWER_SUPPLY_OCV_TEMP_MAX];/* celsius */ + struct power_supply_battery_ocv_table *ocv_table[POWER_SUPPLY_OCV_TEMP_MAX]; + int ocv_table_size[POWER_SUPPLY_OCV_TEMP_MAX]; }; extern struct atomic_notifier_head power_supply_notifier; @@ -350,6 +360,15 @@ extern struct power_supply *devm_power_supply_get_by_phandle( extern int power_supply_get_battery_info(struct power_supply *psy, struct power_supply_battery_info *info); +extern void power_supply_put_battery_info(struct power_supply *psy, + struct power_supply_battery_info *info); +extern int power_supply_ocv2cap_simple(struct power_supply_battery_ocv_table *table, + int table_len, int ocv); +extern struct power_supply_battery_ocv_table * +power_supply_find_ocv2cap_table(struct power_supply_battery_info *info, + int temp, int *table_len); +extern int power_supply_batinfo_ocv2cap(struct power_supply_battery_info *info, + int ocv, int temp); extern void power_supply_changed(struct power_supply *psy); extern int power_supply_am_i_supplied(struct power_supply *psy); extern int power_supply_set_input_current_limit_from_supplier(