From patchwork Tue Feb 25 08:52:32 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matti Vaittinen X-Patchwork-Id: 1243935 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 48RXkn6XrJz9sQt for ; Tue, 25 Feb 2020 19:52:49 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729959AbgBYIws (ORCPT ); Tue, 25 Feb 2020 03:52:48 -0500 Received: from mail-lj1-f195.google.com ([209.85.208.195]:42502 "EHLO mail-lj1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726916AbgBYIws (ORCPT ); Tue, 25 Feb 2020 03:52:48 -0500 Received: by mail-lj1-f195.google.com with SMTP id d10so13079892ljl.9; Tue, 25 Feb 2020 00:52:46 -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=xsU/6aFnt6cc6o/l2fbAxprJ8+a0i4ExXm0gEynzF+s=; b=ORNZYPIk9iNB1oDtM6WOkGUjPltpAPtbI4kXYv4WKexLQC6nUcnFloStniSykXl6LB h4InLHJ0WEjX5a4Y7b5qR6wZeKQ+oXCIlV3ntTWvmvq1EAYvpjv/mmiYgObRqw+ulNYN khbLy5y7D2HNnY2ZtRT3xhHwklmmsUwnVHp4HeB2WG7OgMjXubYM+bHlI9MUGIT5NUsw 6VC/f/LJhsZ9gBIjtXYAIkxLMe8OaH685/zXhGvtgF3vY3pBIsYo3oghf7ein4GJJBDi 7qqFVY+eZQ5MYEvBBZAnhngP76qdVhNChyia9BG+d/FE3DyTedgc4pL9HIDXPKIXD0oJ Eahg== X-Gm-Message-State: APjAAAVNVi5yB3KX7q4SKusESy5USjuoRXBquFV6kkr6lawJZKPKCeF8 COYKvbsZfqIie9Evlh9fIvg= X-Google-Smtp-Source: APXvYqy7brF1VxZ4c6iIW+g08pUtLs+ZqdVJVjJwqFPaWWyqEmjEc0ArLCC78upZHUHSzX47viR1kw== X-Received: by 2002:a2e:86d6:: with SMTP id n22mr30607540ljj.77.1582620765380; Tue, 25 Feb 2020 00:52:45 -0800 (PST) Received: from localhost.localdomain ([213.255.186.46]) by smtp.gmail.com with ESMTPSA id f4sm7332975ljo.79.2020.02.25.00.52.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 25 Feb 2020 00:52:44 -0800 (PST) Date: Tue, 25 Feb 2020 10:52:32 +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 , Matti Vaittinen , linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Markus Laine , Mikko Mutanen Subject: [PATCH v4 2/9] dt_bindings: ROHM BD99954 Charger Message-ID: <7aa7f2646077228924d596edbc4d076a787d9312.1582617178.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: 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 --- Changes from rfc-v3: - uncomment multipleOf - add address and size cells properties to example I2C node .../bindings/power/supply/rohm,bd9995x.yaml | 155 ++++++++++++++++++ 1 file changed, 155 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..547403773ec5 --- /dev/null +++ b/Documentation/devicetree/bindings/power/supply/rohm,bd9995x.yaml @@ -0,0 +1,155 @@ +# 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 { + #address-cells = <1>; + #size-cells = <0>; + 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>; + }; + };