From patchwork Thu Feb 20 07:34:19 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Vaittinen, Matti" X-Patchwork-Id: 11393485 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 8CE7313A4 for ; Thu, 20 Feb 2020 07:34:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 77A0924673 for ; Thu, 20 Feb 2020 07:34:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726759AbgBTHef (ORCPT ); Thu, 20 Feb 2020 02:34:35 -0500 Received: from mail-lj1-f193.google.com ([209.85.208.193]:34680 "EHLO mail-lj1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726443AbgBTHee (ORCPT ); Thu, 20 Feb 2020 02:34:34 -0500 Received: by mail-lj1-f193.google.com with SMTP id x7so3152888ljc.1; Wed, 19 Feb 2020 23:34:33 -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=wXda0LyWckmOxCnu3svogcv/3s7lvsQvOxCdmqlN0xY=; b=D7Uc2RPGA0cbVeLQZ+eGd835uL/rqhCKrAUA2bfj1XMUFIHsNqYn0MZzYBNbYN5LY7 8Mr4JlTH494RuJjgJoDwTE6kLi2JYaBKQfFkSVyLayeclUOc89sjB41dZa+75gWcbq/r qGpMJoPxnLwXGznavzjv/jAXEvF06v+TGca9BPj7CdwAHxVsL46BrCjGCNjcF1h2eEEm cVf3eEFQ4ifiT6O0OOklGSqNNQTh5BShGemSVS6Talp4IRdC9byFFOx01ce2CFy7qtoE ZZSdCGYW/EjoJsGNWcwlGCfgd/S/fOmwZV6RERvDB7rX+XVjbbYwk2se1qk3MQ3jacKE YSsg== X-Gm-Message-State: APjAAAXu/PP9g78itDHibHQ/7oaYKDCe6KFfTUXW4MZKl4OMJlg3H0eB qcYhG0Mov6APmyJilhsK/ug= X-Google-Smtp-Source: APXvYqz/C8xvZsGRp6+GrWlhC0fklQ19iCSL9tLVLoErEIBwsW7OcMSutpzrdaGhC6S9CU54nYAa9A== X-Received: by 2002:a2e:6817:: with SMTP id c23mr17518667lja.263.1582184072548; Wed, 19 Feb 2020 23:34:32 -0800 (PST) Received: from localhost.localdomain ([213.255.186.46]) by smtp.gmail.com with ESMTPSA id e8sm1316105ljb.45.2020.02.19.23.34.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 19 Feb 2020 23:34:31 -0800 (PST) Date: Thu, 20 Feb 2020 09:34:19 +0200 From: Matti Vaittinen To: matti.vaittinen@fi.rohmeurope.com, mazziesaccount@gmail.com Cc: Sebastian Reichel , Rob Herring , Mark Rutland , Greg Kroah-Hartman , "Rafael J. Wysocki" , Liam Girdwood , Mark Brown , "GitAuthor: Matti Vaittinen" , linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Markus Laine , Mikko Mutanen Subject: [RFC PATCH v3 1/8] dt-bindings: battry: 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 --- 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..1ad05dd59213 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