From patchwork Fri Feb 14 07:30:05 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Vaittinen, Matti" X-Patchwork-Id: 11381821 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 DCF8213A4 for ; Fri, 14 Feb 2020 07:30:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C56052467B for ; Fri, 14 Feb 2020 07:30:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728799AbgBNHaU (ORCPT ); Fri, 14 Feb 2020 02:30:20 -0500 Received: from mail-lj1-f194.google.com ([209.85.208.194]:44928 "EHLO mail-lj1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726004AbgBNHaU (ORCPT ); Fri, 14 Feb 2020 02:30:20 -0500 Received: by mail-lj1-f194.google.com with SMTP id q8so9533516ljj.11; Thu, 13 Feb 2020 23:30:18 -0800 (PST) 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=OK8b76FI7R1kE2ixqltPk7Y/aMc3/Mnf8o0VOFb9SgM=; b=ECBD2QeJFy3j3OzkvLL4405Ih8WABt8D3NlxwEgE/FkRihoyuchVSoLkGmUYfDzKSt C5du0nI+NoBsjJFcVKkCiIsAVVIiS/XlNXM6eRijCrHUCF0NJKNsXXJTCPj5PB/qEu+a DavxjW4HGf/guBAycIzUX+DlFU0ey9sd1VoL0aTioz1Oucqm7ZSJH768zeSLoQGbCF26 PJQc7HBTUxKyJbgCmWZzmXVn8V1g5UN4ZxKKB0IkRmH4aPVjHCoMgCeG5CaAh8yg8raP o+f5nxCCjrLNRX/K39sMhFBY7k1BXZdrtPAGpK9ntGrc/Bh+VQj49I73xLJdnRG8fjTl O1aQ== X-Gm-Message-State: APjAAAXG8NZ55S8pFXA+Ck3PNtsv5/UJxjJrFT+ItQcokD7V1npYsnSM Ys5+iHx/QWUGmcwy0h7434Q= X-Google-Smtp-Source: APXvYqxxcm8E4OErYyBuLz1y5/MtV6Kfw5DU4CAp6uHZlYulm/aiQB+V7ftBoSwOXcMVpOdD0S+wmg== X-Received: by 2002:a2e:909a:: with SMTP id l26mr1100954ljg.209.1581665417662; Thu, 13 Feb 2020 23:30:17 -0800 (PST) Received: from localhost.localdomain ([213.255.186.46]) by smtp.gmail.com with ESMTPSA id w8sm2953801ljj.75.2020.02.13.23.30.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 13 Feb 2020 23:30:17 -0800 (PST) Date: Fri, 14 Feb 2020 09:30:05 +0200 From: Matti Vaittinen To: matti.vaittinen@fi.rohmeurope.com, mazziesaccount@gmail.com Cc: mikko.mutanen@fi.rohmeurope.com, markus.laine@fi.rohmeurope.com, Linus Walleij , Mark Brown , Sebastian Reichel , Rob Herring , Mark Rutland , linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [RFC PATCH v2 1/5] dt-bindings: battry: add new battery parameters Message-ID: <205c01fe0555fe89226521a89a5b20933578780d.1581597365.git.matti.vaittinen@fi.rohmeurope.com> 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: - tricklecharge-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 tricklecharge-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 --- 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 5c913d4cf36c..7da044273e08 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 + - tricklecharge-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