From patchwork Mon Sep 14 21:26:12 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Andrew Davis X-Patchwork-Id: 7178581 Return-Path: X-Original-To: patchwork-linux-pm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 57A4ABEEC1 for ; Mon, 14 Sep 2015 21:27:58 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 64E7C20630 for ; Mon, 14 Sep 2015 21:27:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6798B2063E for ; Mon, 14 Sep 2015 21:27:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752547AbbINV1u (ORCPT ); Mon, 14 Sep 2015 17:27:50 -0400 Received: from arroyo.ext.ti.com ([192.94.94.40]:33269 "EHLO arroyo.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752244AbbINV0r (ORCPT ); Mon, 14 Sep 2015 17:26:47 -0400 Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by arroyo.ext.ti.com (8.13.7/8.13.7) with ESMTP id t8ELQgnl015292; Mon, 14 Sep 2015 16:26:42 -0500 Received: from DLEE70.ent.ti.com (dlemailx.itg.ti.com [157.170.170.113]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id t8ELQgV2017464; Mon, 14 Sep 2015 16:26:42 -0500 Received: from dflp32.itg.ti.com (10.64.6.15) by DLEE70.ent.ti.com (157.170.170.113) with Microsoft SMTP Server id 14.3.224.2; Mon, 14 Sep 2015 16:26:43 -0500 Received: from legion.dal.design.ti.com (legion.dal.design.ti.com [128.247.22.53]) by dflp32.itg.ti.com (8.14.3/8.13.8) with ESMTP id t8ELQgs0028779; Mon, 14 Sep 2015 16:26:42 -0500 Received: from localhost (uda0226330.am.dhcp.ti.com [128.247.8.252]) by legion.dal.design.ti.com (8.11.7p1+Sun/8.11.7) with ESMTP id t8ELQg923569; Mon, 14 Sep 2015 16:26:42 -0500 (CDT) From: "Andrew F. Davis" To: =?UTF-8?q?Pali=20Roh=C3=A1r?= , Sebastian Reichel , Dmitry Eremin-Solenikov , David Woodhouse CC: Dan Murphy , , , "Andrew F. Davis" Subject: [PATCH v4 6/7] power: bq27xxx_battery: Cleanup health checking Date: Mon, 14 Sep 2015 16:26:12 -0500 Message-ID: <1442265973-32261-7-git-send-email-afd@ti.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1442265973-32261-1-git-send-email-afd@ti.com> References: <1442265973-32261-1-git-send-email-afd@ti.com> MIME-Version: 1.0 Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Reorganize the logic checking battery health and add under temperature condition checking. Signed-off-by: Andrew F. Davis Acked-by: Pali Rohár --- drivers/power/bq27xxx_battery.c | 64 +++++++++++++++++++++++++++-------------- 1 file changed, 42 insertions(+), 22 deletions(-) diff --git a/drivers/power/bq27xxx_battery.c b/drivers/power/bq27xxx_battery.c index 3098609..10be8a6 100644 --- a/drivers/power/bq27xxx_battery.c +++ b/drivers/power/bq27xxx_battery.c @@ -63,6 +63,8 @@ #define BQ27XXX_FLAG_FC BIT(9) #define BQ27XXX_FLAG_OTD BIT(14) #define BQ27XXX_FLAG_OTC BIT(15) +#define BQ27XXX_FLAG_UT BIT(14) +#define BQ27XXX_FLAG_OT BIT(15) /* BQ27000 has different layout for Flags register */ #define BQ27000_FLAG_EDVF BIT(0) /* Final End-of-Discharge-Voltage flag */ @@ -621,12 +623,36 @@ static int bq27xxx_battery_read_pwr_avg(struct bq27xxx_device_info *di) /* * Returns true if a battery over temperature condition is detected */ -static int bq27xxx_battery_overtemp(struct bq27xxx_device_info *di, u16 flags) +static bool bq27xxx_battery_overtemp(struct bq27xxx_device_info *di, u16 flags) { - if (di->chip == BQ27500 || di->chip == BQ27541) + if (di->chip == BQ27500 || di->chip == BQ27541 || di->chip == BQ27545) return flags & (BQ27XXX_FLAG_OTC | BQ27XXX_FLAG_OTD); + if (di->chip == BQ27530 || di->chip == BQ27421) + return flags & BQ27XXX_FLAG_OT; + + return false; +} + +/* + * Returns true if a battery under temperature condition is detected + */ +static bool bq27xxx_battery_undertemp(struct bq27xxx_device_info *di, u16 flags) +{ + if (di->chip == BQ27530 || di->chip == BQ27421) + return flags & BQ27XXX_FLAG_UT; + + return false; +} + +/* + * Returns true if a low state of charge condition is detected + */ +static bool bq27xxx_battery_dead(struct bq27xxx_device_info *di, u16 flags) +{ + if (di->chip == BQ27000 || di->chip == BQ27010) + return flags & (BQ27000_FLAG_EDV1 | BQ27000_FLAG_EDVF); else - return flags & BQ27XXX_FLAG_OTC; + return flags & (BQ27XXX_FLAG_SOC1 | BQ27XXX_FLAG_SOCF); } /* @@ -635,29 +661,23 @@ static int bq27xxx_battery_overtemp(struct bq27xxx_device_info *di, u16 flags) */ static int bq27xxx_battery_read_health(struct bq27xxx_device_info *di) { - u16 tval; + u16 flags; - tval = bq27xxx_read(di, BQ27XXX_REG_FLAGS, false); - if (tval < 0) { - dev_err(di->dev, "error reading flag register:%d\n", tval); - return tval; + flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, false); + if (flags < 0) { + dev_err(di->dev, "error reading flag register:%d\n", flags); + return flags; } - if (di->chip == BQ27000 || di->chip == BQ27010) { - if (tval & BQ27000_FLAG_EDV1) - tval = POWER_SUPPLY_HEALTH_DEAD; - else - tval = POWER_SUPPLY_HEALTH_GOOD; - } else { - if (tval & BQ27XXX_FLAG_SOCF) - tval = POWER_SUPPLY_HEALTH_DEAD; - else if (bq27xxx_battery_overtemp(di, tval)) - tval = POWER_SUPPLY_HEALTH_OVERHEAT; - else - tval = POWER_SUPPLY_HEALTH_GOOD; - } + /* Unlikely but important to return first */ + if (unlikely(bq27xxx_battery_overtemp(di, flags))) + return POWER_SUPPLY_HEALTH_OVERHEAT; + if (unlikely(bq27xxx_battery_undertemp(di, flags))) + return POWER_SUPPLY_HEALTH_COLD; + if (unlikely(bq27xxx_battery_dead(di, flags))) + return POWER_SUPPLY_HEALTH_DEAD; - return tval; + return POWER_SUPPLY_HEALTH_GOOD; } static void bq27xxx_battery_update(struct bq27xxx_device_info *di)