From patchwork Thu May 7 06:10:26 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Vaittinen, Matti" X-Patchwork-Id: 11532539 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1D50592A for ; Thu, 7 May 2020 06:11:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0CEC5208DB for ; Thu, 7 May 2020 06:11:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725809AbgEGGLP (ORCPT ); Thu, 7 May 2020 02:11:15 -0400 Received: from mail-lj1-f196.google.com ([209.85.208.196]:38411 "EHLO mail-lj1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725783AbgEGGLP (ORCPT ); Thu, 7 May 2020 02:11:15 -0400 Received: by mail-lj1-f196.google.com with SMTP id e25so4986633ljg.5; Wed, 06 May 2020 23:11:13 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=KprKeb/h9kjW27OoSf2ZZ4Ya0v6rQT0g3k0Y7DumGOM=; b=LSFK3nbRDOs9UMZ/gtFkuAZtY1U/bo2cXiqOdoyJKH9ApagnnTvJGHZkGr5fkSijdo AhGTLYw1JweLDIBzu0D16M+zXk6JdoCEC52cSdeR4nA8LBy4PDg5NyxCQN3y08wRNsom /fMisb6b/qGucLjnM8n5KSW5pE3N89fgRoG5szW6ySlkXnykLY3HEGLJjMnpXcMPUESE rPTpGyXWRuk9C8TreUz6K5v/RwuY9CdnqzPeTTtl4SBIxt6Wv284NkDsTJrIRrMaEuZy OEf5t9W4c8x/z+JX8zfE+7qPE3gutwHc3WamGQ2ndlA7wjKpHj4omZYktToqRYsXqyM4 ylpw== X-Gm-Message-State: AGi0PuawO6wpXEWvKGRCoXcSHIX3ewVF7l0WDaGqEsjAVwld5OOvekGq 2/LKAQetgS0DAsd4m1Q6wKKkDiMtWso= X-Google-Smtp-Source: APiQypKb9Hn82Q8kZeqqYq/EAuBvCn+5mGtpwnuEROaY0Cg9N1wact70nN1a7xIQ7qd8+EoPJE9bRQ== X-Received: by 2002:a2e:97d3:: with SMTP id m19mr7018069ljj.136.1588831872522; Wed, 06 May 2020 23:11:12 -0700 (PDT) Received: from localhost.localdomain (62-78-225-252.bb.dnainternet.fi. [62.78.225.252]) by smtp.gmail.com with ESMTPSA id u21sm2625894ljo.61.2020.05.06.23.11.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 06 May 2020 23:11:11 -0700 (PDT) Date: Thu, 7 May 2020 09:10:26 +0300 From: Matti Vaittinen To: matti.vaittinen@fi.rohmeurope.com, mazziesaccount@gmail.com Cc: lgirdwood@gmail.com, broonie@kernel.org, sre@kernel.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v11 06/11] dt-bindings: battery: add new battery parameters Message-ID: References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.12.1 (2019-06-15) Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Add: - trickle-charge-current-microamp: Some chargers have 3 charging stages. First one when battery is almost empty is often called as trickle-charge. Last state when battery has been "woken up" is usually called as fast-charge. In addition to this some chargers have a 'middle state' which ROHM BD99954 data-sheet describes as pre-charge. Some batteries can benefit from this 3-phase charging [citation needed]. Introduce trickle-charge-current-microamp so that batteries can give charging current limit for all three states. - precharge-upper-limit-microvolt: When battery voltage has reached certain limit we change from trickle-charge to next charging state (pre-charge for BD99954). Allow battery to specify this limit. - re-charge-voltage-microvolt: Allow giving a battery specific voltage limit for chargers which can automatically re-start charging when battery has discharghed down to this limit. - over-voltage-threshold-microvolt Allow specifying voltage threshold after which the battery is assumed to be faulty. Signed-off-by: Matti Vaittinen Reviewed-by: Rob Herring Reviewed-by: Sebastian Reichel --- Documentation/devicetree/bindings/power/supply/battery.txt | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/Documentation/devicetree/bindings/power/supply/battery.txt b/Documentation/devicetree/bindings/power/supply/battery.txt index 3049cf88bdcf..5e29595edd74 100644 --- a/Documentation/devicetree/bindings/power/supply/battery.txt +++ b/Documentation/devicetree/bindings/power/supply/battery.txt @@ -11,15 +11,21 @@ different type. This prevents unpredictable, potentially harmful, behavior should a replacement that changes the battery type occur without a corresponding update to the dtb. +Please note that not all charger drivers respect all of the properties. + Required Properties: - compatible: Must be "simple-battery" Optional Properties: + - over-voltage-threshold-microvolt: battery over-voltage limit + - re-charge-voltage-microvolt: limit to automatically start charging again - voltage-min-design-microvolt: drained battery voltage - voltage-max-design-microvolt: fully charged battery voltage - energy-full-design-microwatt-hours: battery design energy - charge-full-design-microamp-hours: battery design capacity + - trickle-charge-current-microamp: current for trickle-charge phase - precharge-current-microamp: current for pre-charge phase + - precharge-upper-limit-microvolt: limit when to change to constant charging - 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