From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 45EBEC6FD1F for ; Thu, 9 Mar 2023 07:15:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230113AbjCIHPK (ORCPT ); Thu, 9 Mar 2023 02:15:10 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58232 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230290AbjCIHPC (ORCPT ); Thu, 9 Mar 2023 02:15:02 -0500 Received: from muru.com (muru.com [72.249.23.125]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id C84064ECD0; Wed, 8 Mar 2023 23:14:45 -0800 (PST) Received: from localhost (localhost [127.0.0.1]) by muru.com (Postfix) with ESMTPS id 3C2BE80DE; Thu, 9 Mar 2023 07:14:45 +0000 (UTC) Date: Thu, 9 Mar 2023 09:14:43 +0200 From: Tony Lindgren To: Ivaylo Dimitrov Cc: Pavel Machek , kernel list , linux-arm-kernel , linux-omap@vger.kernel.org, sre@kernel.org, nekit1000@gmail.com, mpartap@gmx.net, merlijn@wizzup.org, martin_rysavy@centrum.cz, phone-devel@vger.kernel.org, maemo-leste@lists.dyne.org Subject: Re: Motorola Droid 4 -- Stopping charger when battery is full Message-ID: <20230309071443.GF7501@atomide.com> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org * Ivaylo Dimitrov [230307 14:10]: > Also, some guys have concerns about charging (and keeping it charged) @4.35, > because of the possibly reduced battery life. Yes for devices connected to a charger for long periods the battery will bloat up within some weeks or months. This happens easily when using a lapdock for example. A simple and safe solution here might be that we allow charging up to 4.35V only once when the charger is connected. Then we let the voltage decrease to 4.2V (or whatever known good maintenance voltage) if the charger stays connected. For folks wanting to force the charge voltage higher we have the sysfs interface. Regards, Tony From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 88C9FC64EC4 for ; Thu, 9 Mar 2023 07:15:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=aZu2PDNWeFHF32U4AmE2qUjAp4gj54ziZrohtpU/l9o=; b=SwAEMm9Km+H9Dj g0DiApqhdXqvyweqs9qGjfqhV172MFEbvOzki9ySBvYQg7/VhqDggBohB7kFXkkVmBUdDCR9k16eg FtVUqYqerfBWCdkJpwNllw0MpeX3+F6nXj6Re9gkTeQsVRfJQ1Ol++BwfaASfsCBSrN7dpPnKH3Cc MWWHUPhc8bPSHoaUr9+22htTLNckxe213HIA8LP/eeDck0LB2HcDLNq09rGGKLIvV1TYaoQOWhfRg JU461EGSYl21Xl+rtPtO2OnS3NdG4kOKPipSYbBBnHMBii8cHrVZiBtZsNxQ2GcWS/mF8ZU6PdfjW QIDZqXN60OULCPlawlXA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1paAUC-008Cex-NO; Thu, 09 Mar 2023 07:14:48 +0000 Received: from muru.com ([72.249.23.125]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1paAUA-008CeT-94 for linux-arm-kernel@lists.infradead.org; Thu, 09 Mar 2023 07:14:47 +0000 Received: from localhost (localhost [127.0.0.1]) by muru.com (Postfix) with ESMTPS id 3C2BE80DE; Thu, 9 Mar 2023 07:14:45 +0000 (UTC) Date: Thu, 9 Mar 2023 09:14:43 +0200 From: Tony Lindgren To: Ivaylo Dimitrov Cc: Pavel Machek , kernel list , linux-arm-kernel , linux-omap@vger.kernel.org, sre@kernel.org, nekit1000@gmail.com, mpartap@gmx.net, merlijn@wizzup.org, martin_rysavy@centrum.cz, phone-devel@vger.kernel.org, maemo-leste@lists.dyne.org Subject: Re: Motorola Droid 4 -- Stopping charger when battery is full Message-ID: <20230309071443.GF7501@atomide.com> References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230308_231446_399567_BDDE1BDF X-CRM114-Status: UNSURE ( 8.93 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org * Ivaylo Dimitrov [230307 14:10]: > Also, some guys have concerns about charging (and keeping it charged) @4.35, > because of the possibly reduced battery life. Yes for devices connected to a charger for long periods the battery will bloat up within some weeks or months. This happens easily when using a lapdock for example. A simple and safe solution here might be that we allow charging up to 4.35V only once when the charger is connected. Then we let the voltage decrease to 4.2V (or whatever known good maintenance voltage) if the charger stays connected. For folks wanting to force the charge voltage higher we have the sysfs interface. Regards, Tony _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel