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: "Vaittinen, Matti" X-Patchwork-Id: 11393487 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 BB65713A4 for ; Thu, 20 Feb 2020 07:35:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9CD8B2467A for ; Thu, 20 Feb 2020 07:35:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726759AbgBTHfV (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: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@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>; + }; + };