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: Matti Vaittinen X-Patchwork-Id: 1241290 Return-Path: X-Original-To: incoming-dt@patchwork.ozlabs.org Delivered-To: patchwork-incoming-dt@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (no SPF record) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=devicetree-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=fi.rohmeurope.com Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 48NRDq6bwTz9sRN for ; Thu, 20 Feb 2020 18:34:35 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726562AbgBTHef (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: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@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 From patchwork Thu Feb 20 07:35:10 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matti Vaittinen X-Patchwork-Id: 1241291 Return-Path: X-Original-To: incoming-dt@patchwork.ozlabs.org Delivered-To: patchwork-incoming-dt@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (no SPF record) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=devicetree-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=fi.rohmeurope.com Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 48NRFj5PS3z9sRN for ; Thu, 20 Feb 2020 18:35:21 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726562AbgBTHfV (ORCPT ); Thu, 20 Feb 2020 02:35:21 -0500 Received: from mail-lf1-f65.google.com ([209.85.167.65]:46628 "EHLO mail-lf1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726443AbgBTHfV (ORCPT ); Thu, 20 Feb 2020 02:35:21 -0500 Received: by mail-lf1-f65.google.com with SMTP id z26so2226263lfg.13; Wed, 19 Feb 2020 23:35:18 -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=ql2HduRsN3YaSuvoHPSqRaIQbvZ8WP90c57ltIwIGZE=; b=qovvFR12gR+m7WOSBSxSgXXbCSF0SuR/Ejo8lElONNU0AJAvBCTEm/OitXsNLWl2Kg 2Ib4q13q12FvQ/SXKaStvZCY7zm7XGbIjyGxCH4zfk39JInqJaOf/4EgaB3jsDRxocUw vC4qFSmorNFa3YWuMC52eBcRIX8WgH0CNPFaCck8CP58KxnruxXAjaj1cKbF7NHKL5F5 iZb7+f/Jl84PsoIKOjtqQtzNsGsg0rSOzUd8MiaRF0IVeftXj+0fJh49sjHI3WRCCFfX xq6e1EKJdlQBvpTaOnnmpxOeZl5Xelyu0hSjXPT3rWWA1T+C/5hc2DWs4rVgAoZ7T5jp 6Gew== X-Gm-Message-State: APjAAAX8TEdATZ9pUCRp0qkLhAjaJK1y2Ff+YSm/82ocCNlm8wzNyVVA ZqrfE2LwfgHK+yIgnKeYuYw= X-Google-Smtp-Source: APXvYqwO4DZMfq+31C2aGGMWK5qR56nrlMGuO9YrxpSWEvwrLcfTDoDeewuOjthSQSLClt4hcjeASA== X-Received: by 2002:ac2:5196:: with SMTP id u22mr14955587lfi.123.1582184117382; Wed, 19 Feb 2020 23:35:17 -0800 (PST) Received: from localhost.localdomain ([213.255.186.46]) by smtp.gmail.com with ESMTPSA id j19sm1399556lfb.90.2020.02.19.23.35.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 19 Feb 2020 23:35:16 -0800 (PST) Date: Thu, 20 Feb 2020 09:35:10 +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 2/8] dt_bindings: ROHM BD99954 Charger Message-ID: References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.12.1 (2019-06-15) Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org The ROHM BD99954 is a Battery Management LSI for 1-4 cell Lithium-Ion secondary battery. Intended to be used in space-constraint equipment such as Low profile Notebook PC, Tablets and other applications. BD99954 provides a Dual-source Battery Charger, two port BC1.2 detection and a Battery Monitor. Document the DT bindings for BD99954 Signed-off-by: Matti Vaittinen --- .../bindings/power/supply/rohm,bd9995x.yaml | 153 ++++++++++++++++++ 1 file changed, 153 insertions(+) create mode 100644 Documentation/devicetree/bindings/power/supply/rohm,bd9995x.yaml diff --git a/Documentation/devicetree/bindings/power/supply/rohm,bd9995x.yaml b/Documentation/devicetree/bindings/power/supply/rohm,bd9995x.yaml new file mode 100644 index 000000000000..032aaa0a305e --- /dev/null +++ b/Documentation/devicetree/bindings/power/supply/rohm,bd9995x.yaml @@ -0,0 +1,153 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/power/supply/rohm,bd9995x.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: ROHM BD99954 Battery charger driver + +maintainers: + - Matti Vaittinen + - Markus Laine + - Mikko Mutanen + +description: | + The ROHM BD99954 is a Battery Management LSI for 1-4 cell Lithium-Ion + secondary battery intended to be used in space-constraint equipment such + as Low profile Notebook PC, Tablets and other applications. BD99954 + provides a Dual-source Battery Charger, two port BC1.2 detection and a + Battery Monitor. + + +properties: + compatible: + const: rohm,bd9995x-charger +# +# The battery charging profile of BD99954. +# +# Curve (1) represents charging current. +# Curve (2) represents battery voltage. +# +# The BD99954 data sheet divides charging to three phases. +# a) Trickle-charge with constant current (8). +# b) pre-charge with constant current (6) +# c) fast-charge with: +# First a constant current (5) phase (CC) +# Then constant voltage (CV) phase (after the battery voltage has reached +# target level - until charging current has dropped to termination +# level (7) +# +# V ^ ^ I +# . . +# . . +# (4)- -.- - - - - - - - - - - - - - +++++++++++++++++++++++++++. +# . / . +# . ++++++/++ - - - - - - - - - - - - -.- - (5) +# . + / + . +# . + - -- . +# . + - + . +# . +.- -: . +# . .+ +` . +# . .- + | `/ . +# . .." + .: . +# . -" + -- . +# . (2) ..." + | :- . +# . ..."" + -: . +# (3)- -.-.""- - - - -+++++++++ - - - - - - -.:- - - - - - - - - .- - (6) +# . + `:. . +# . + | -: . +# . + -: . +# . + .. . +# . (1) + | "+++- - - -.- - (7) +# -++++++++++++++- - - - - - - - - - - - - - - - - + - - - .- - (8) +# . + - +# -------------------------------------------------+++++++++--> +# | | | CC | CV | +# | --trickle-- | -pre- | ---------fast----------- | +# +# The charger uses the following battery properties +# - trickle-charge-current-microamp: +# Current used at trickle-charge phase (8 in above chart) +# minimum: 64000 +# maximum: 1024000 +# multipleOf: 64000 +# - precharge-current-microamp: +# Current used at pre-charge phase (6 in above chart) +# minimum: 64000 +# maximum: 1024000 +# multipleOf: 64000 +# - constant-charge-current-max-microamp +# Current used at fast charge constant current phase (5 in above chart) +# minimum: 64000 +# maximum: 1024000 +# multipleOf: 64000 +# - constant-charge-voltage-max-microvolt +# The constant voltage used in fast charging phase (4 in above chart) +# minimum: 2560000 +# maximum: 19200000 +# multipleOf: 16000 +# - precharge-upper-limit-microvolt +# charging mode is changed from trickle charging to pre-charging +# when battery voltage exceeds this limit voltage (3 in above chart) +# minimum: 2048000 +# maximum: 19200000 +# multipleOf: 64000 +# - re-charge-voltage-microvolt +# minimum: 2560000 +# maximum: 19200000 +# multipleOf: 16000 +# re-charging is automatically started when battry has been discharging +# to the point where the battery voltage drops below this limit +# - over-voltage-threshold-microvolt +# battery is expected to be faulty if battery voltage exceeds this limit. +# Charger will then enter to a "battery faulty" -state +# minimum: 2560000 +# maximum: 19200000 +# multipleOf: 16000 +# - charge-term-current-microamp +# minimum: 0 +# maximum: 1024000 +# multipleOf: 64000 +# a charge cycle terminates when the battery voltage is above recharge +# threshold, and the current is below this setting (7 in above chart) +# See also Documentation/devicetree/bindings/power/supply/battery.txt + + monitored-battery: + description: + phandle of battery characteristics devicetree node + + rohm,vsys-regulation-microvolt: + description: system specific lower limit for system voltage. + minimum: 2560000 + maximum: 19200000 + #multipleOf: 64000 + + rohm,vbus-input-current-limit-microamp: + description: system specific VBUS input current limit (in microamps). + minimum: 32000 + maximum: 16352000 + #multipleOf: 32000 + + rohm,vcc-input-current-limit-microamp: + description: system specific VCC/VACP input current limit (in microamps). + minimum: 32000 + maximum: 16352000 + #multipleOf: 32000 + +required: + - compatible + +examples: + - | + i2c { + charger@9 { + compatible = "rohm,bd9995x-charger"; + monitored-battery = <&battery>; + reg = <0x9>; + interrupt-parent = <&gpio1>; + interrupts = <29 8>; + rohm,vsys-regulation-microvolt = <8960000>; + rohm,vbus-input-current-limit-microamp = <1472000>; + rohm,vcc-input-current-limit-microamp = <1472000>; + }; + };