From patchwork Wed Mar 18 11:47:30 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matti Vaittinen X-Patchwork-Id: 1257441 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 48j7ZR50H2z9sSd for ; Wed, 18 Mar 2020 22:47:43 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727112AbgCRLrj (ORCPT ); Wed, 18 Mar 2020 07:47:39 -0400 Received: from mail-lf1-f68.google.com ([209.85.167.68]:36791 "EHLO mail-lf1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726845AbgCRLrj (ORCPT ); Wed, 18 Mar 2020 07:47:39 -0400 Received: by mail-lf1-f68.google.com with SMTP id s1so20065073lfd.3; Wed, 18 Mar 2020 04:47:38 -0700 (PDT) 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=Nh4UhvTKl+29tzL3tROO0vjxlPcLXCH4Rq0vuGpKBTo=; b=DJf98o1ZyGZxL3Ynw7UkcaeGLuODKM2tT8ZNhXD/7ssqjyhcWj7sVvRpH/zT6F5EiX aIPxQKiVtq8fndzaXeiLTNN6+pQkqkkNrHj6px4i8ZBwallDW1MVExkf2u/nw5ZMdK8p 88sW/iMPI1nrjJp+B32FmwlA8IR/rdydFZziueqgLleuutX4KyD58pVVHmDiaAY0Olx6 fdkZC/4FwTxSl3ll539KMNzQD5Yb0UMUMxaLtZGhcwPLh1h8a1xLThrj/DLE0XfNiF5k 53h8tNkVvZFnmKk9TURWrOBLVvEzAjlhir843qin6vnxPWPxLr41i2vgsOALGZvwuv3e cF0A== X-Gm-Message-State: ANhLgQ3ns7i6f2Cao6DKGVdMxKhtbgY9g0X6gBaH275HFHDuflDGY8w1 Ben2wanjGlv8oBftkZzf6aI= X-Google-Smtp-Source: ADFU+vsjRRiWnpOH9EnhBKIgi23BSkJ0RntNToXR/u1YBLe0+ADEn6zgC1soS/48g9U3/HpiP1jIPg== X-Received: by 2002:a05:6512:10c4:: with SMTP id k4mr2669210lfg.98.1584532057148; Wed, 18 Mar 2020 04:47:37 -0700 (PDT) Received: from localhost.localdomain (dc7t7ryyyyyyyyyyyyybt-3.rev.dnainternet.fi. [2001:14ba:16e1:b700::3]) by smtp.gmail.com with ESMTPSA id l205sm4377514lfd.50.2020.03.18.04.47.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 18 Mar 2020 04:47:36 -0700 (PDT) Date: Wed, 18 Mar 2020 13:47:30 +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 v5 1/9] dt-bindings: battery: 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 Reviewed-by: Rob Herring --- 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 3049cf88bdcf..5e29595edd74 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 Wed Mar 18 11:49:47 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matti Vaittinen X-Patchwork-Id: 1257442 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 48j7d328wwz9sPF for ; Wed, 18 Mar 2020 22:49:59 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726647AbgCRLt6 (ORCPT ); Wed, 18 Mar 2020 07:49:58 -0400 Received: from mail-lj1-f196.google.com ([209.85.208.196]:33312 "EHLO mail-lj1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726586AbgCRLt6 (ORCPT ); Wed, 18 Mar 2020 07:49:58 -0400 Received: by mail-lj1-f196.google.com with SMTP id f13so26673169ljp.0; Wed, 18 Mar 2020 04:49:56 -0700 (PDT) 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=FSX2KRPkbn5W9dakUVXlf3UmUaijxOrOQb/z1feN3Bo=; b=nWDAiMVfDfHUBmRiSWoLV4DSc6MEgfZOL9gxo2GDglrxe2oRIFqd5y3wogyIlDSXWj N4f9o55ysIL1v9SV0EHJbL+5Ig+2Cm/jUDCQ1RK40Di1vc2e5C/e/zW/0VLjy393zyjR 6G6VFdUjASpl3nmDo05Ky8G3oseXX/I++Zlhe0pUn3is7qkfv5KfxfqDvT6rFsf1aGUo //D74tnyV1CIvPvVHNqIDkfXe8rdhu4EBoor/1s8JkLuOg8JuwLpiayJvuSJ+MQmQ9Kc dGzACCDfAjebMG1E8SsqGt1npExqu+HmNuTl+jOS8zuISblrYzNHZUA9S42x/6UkbRMN B6hg== X-Gm-Message-State: ANhLgQ0wDDqKD+WGWBpf4Ofkx3GEd9k6SSjP8M/JJo8VFLOjkTygRqYW od3PypW56SNc/zQ7SDgE7Jg= X-Google-Smtp-Source: ADFU+vvYIRL1AoNCriE04/mFuYGDD1Z1+Cwqn+6pE+NpLNPDlUhAaQmy2avH0K4yozo+FWxO1hGlWA== X-Received: by 2002:a2e:151e:: with SMTP id s30mr2261463ljd.92.1584532195328; Wed, 18 Mar 2020 04:49:55 -0700 (PDT) Received: from localhost.localdomain (dc7t7ryyyyyyyyyyyyybt-3.rev.dnainternet.fi. [2001:14ba:16e1:b700::3]) by smtp.gmail.com with ESMTPSA id u1sm847992lju.95.2020.03.18.04.49.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 18 Mar 2020 04:49:54 -0700 (PDT) Date: Wed, 18 Mar 2020 13:49:47 +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 v5 2/9] 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 Reviewed-by: Rob Herring --- Changes since v4: - change compatible name and file name accordingly - Fix the title .../bindings/power/supply/rohm,bd99954.yaml | 155 ++++++++++++++++++ 1 file changed, 155 insertions(+) create mode 100644 Documentation/devicetree/bindings/power/supply/rohm,bd99954.yaml diff --git a/Documentation/devicetree/bindings/power/supply/rohm,bd99954.yaml b/Documentation/devicetree/bindings/power/supply/rohm,bd99954.yaml new file mode 100644 index 000000000000..7e0f73a898c7 --- /dev/null +++ b/Documentation/devicetree/bindings/power/supply/rohm,bd99954.yaml @@ -0,0 +1,155 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/power/supply/rohm,bd99954.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: ROHM BD99954 Battery charger + +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,bd99954 +# +# 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,bd99954"; + 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>; + }; + };