From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756513Ab2EGSNm (ORCPT ); Mon, 7 May 2012 14:13:42 -0400 Received: from mga01.intel.com ([192.55.52.88]:63821 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754462Ab2EGSNl (ORCPT ); Mon, 7 May 2012 14:13:41 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.71,315,1320652800"; d="scan'208";a="163036494" From: Ramakrishna Pallala To: linux-kernel@vger.kernel.org Cc: Anton Vorontsov , Anton Vorontsov , MyungJoo Ham , Ramakrishna Pallala Subject: [PATCH] charger_manager: update charge profile upon temperature zone change Date: Mon, 7 May 2012 22:16:12 +0530 Message-Id: <1336409172-4058-1-git-send-email-ramakrishna.pallala@intel.com> X-Mailer: git-send-email 1.7.0.4 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Battery vendors like UER suggest to program Low Charge Voltage in case of high or low temperatures. So a battery can have different charge profile with in the battery operating temperature limits. Next, there could be events like drop or rise in VBUS voltage in that case we might have to adjust the charge current to stabilize VBUS voltage. This patch allows the Charger-Manager to adjust the charging parameters upon events like VBUS rise or drop and allows batteries to have multiple charge profiles for different temperature zones. Signed-off-by: Ramakrishna Pallala --- drivers/power/charger-manager.c | 6 +++++- include/linux/power/charger-manager.h | 5 +++++ 2 files changed, 10 insertions(+), 1 deletions(-) diff --git a/drivers/power/charger-manager.c b/drivers/power/charger-manager.c index 86935ec..9f46353 100644 --- a/drivers/power/charger-manager.c +++ b/drivers/power/charger-manager.c @@ -424,13 +424,17 @@ static void fullbatt_vchk(struct work_struct *work) static bool _cm_monitor(struct charger_manager *cm) { struct charger_desc *desc = cm->desc; + bool update_charger = false; int temp = desc->temperature_out_of_range(&cm->last_temp_mC); dev_dbg(cm->dev, "monitoring (%2.2d.%3.3dC)\n", cm->last_temp_mC / 1000, cm->last_temp_mC % 1000); + if (desc->charging_zone_changed) + update_charger = desc->charging_zone_changed(cm->last_temp_mC); + /* It has been stopped or charging already */ - if (!!temp == !!cm->emergency_stop) + if ((!!temp == !!cm->emergency_stop) && !update_charger) return false; if (temp) { diff --git a/include/linux/power/charger-manager.h b/include/linux/power/charger-manager.h index 241065c..302107d 100644 --- a/include/linux/power/charger-manager.h +++ b/include/linux/power/charger-manager.h @@ -90,6 +90,10 @@ struct charger_global_desc { * return_value > 0: overheat * return_value == 0: normal * return_value < 0: cold + * @charging_zone_changed: + * Determine whether charge profile need an update + * return_value true if charge profile update required + * return_value false if charge profile update is not required * @measure_battery_temp: * true: measure battery temperature * false: measure ambient temperature @@ -114,6 +118,7 @@ struct charger_desc { char *psy_fuel_gauge; int (*temperature_out_of_range)(int *mC); + bool (*charging_zone_changed)(int mC); bool measure_battery_temp; }; -- 1.7.0.4