From patchwork Tue Mar 31 12:22:26 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Vaittinen, Matti" X-Patchwork-Id: 11467747 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 6411492C for ; Tue, 31 Mar 2020 12:22:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3981F208FE for ; Tue, 31 Mar 2020 12:22:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730686AbgCaMWi (ORCPT ); Tue, 31 Mar 2020 08:22:38 -0400 Received: from mail-lf1-f66.google.com ([209.85.167.66]:34638 "EHLO mail-lf1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730642AbgCaMWi (ORCPT ); Tue, 31 Mar 2020 08:22:38 -0400 Received: by mail-lf1-f66.google.com with SMTP id e7so17139196lfq.1; Tue, 31 Mar 2020 05:22:35 -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=UBgWQY8O2F7lxf+qlrGLLmfAbdQp9uenUJ2LLEFCY+I=; b=FA0L0Vucj2Bi8fancseIrNIj1S+zUu/R0nz9081nrqqnMRXpYZ/4A7T8fbRUIGenj/ NJ7p+aBZ0I3CllRFI4q9Wd8IoSdpn3evCyUkTIaFNpWMAgldluZFxfVC3eMSYU9AU1EU KwBTITrDyu6ekOMdo+x9rfXpWleRGN2mM2S3h0+Iv/R2m33DUne7x0bP0cAaH5nZsJuj ZoyDeZeEpc92kQBeJlltD+LkfbO1bLcGrXqm88b0lgOPDlKBzSDvXFpu4QrCMKK2AJsS mm4iyQGjsWfZ3PAas8ttOxEEtm6xeV8+SxGlEopoLD/kN/3C2pywqpgCJi6rovqkhWOp BDBA== X-Gm-Message-State: AGi0PuZodsGszHfRoAVcKckn+D1qHptQvRo4kye7AgdUEV8OksObLfxC pZonDp9Mz4RinWPYXsb41Rc= X-Google-Smtp-Source: APiQypKSpyM7gTf8vsK/YmSi8DCSdFxmXspsOqBWITM1iQn/Ax6p33kSuZtfNICn6M4ebqPCtLEf6g== X-Received: by 2002:ac2:4578:: with SMTP id k24mr11245652lfm.180.1585657354746; Tue, 31 Mar 2020 05:22:34 -0700 (PDT) Received: from localhost.localdomain (dc7t7ryyyyyyyyyyyyybt-3.rev.dnainternet.fi. [2001:14ba:16e1:b700::3]) by smtp.gmail.com with ESMTPSA id b16sm4442821ljh.20.2020.03.31.05.22.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 31 Mar 2020 05:22:34 -0700 (PDT) Date: Tue, 31 Mar 2020 15:22:26 +0300 From: Matti Vaittinen To: matti.vaittinen@fi.rohmeurope.com, mazziesaccount@gmail.com Cc: Greg Kroah-Hartman , Linus Walleij , Mikko Mutanen , Markus Laine , Andrew Morton , Andy Shevchenko , Andy Shevchenko , Ard Biesheuvel , Borislav Petkov , Brendan Higgins , Changbin Du , Dan Williams , David Gow , "David S. Miller" , devicetree@vger.kernel.org, Gary Hook , Herbert Xu , Krzysztof Kozlowski , linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, Mark Rutland , Masahiro Yamada , Masami Hiramatsu , Matti Vaittinen , Mikhail Zaslonko , Randy Dunlap , Rob Herring , Sebastian Reichel , Shuah Khan , Tal Gilboa , Thomas Gleixner , Uwe =?iso-8859-1?q?Kleine-K=F6nig?= , Vincenzo Frascino , Vladimir Oltean , Mark Brown , Liam Girdwood Subject: [PATCH v7 02/10] dt_bindings: ROHM BD99954 Charger Message-ID: <8e47af93563b266020924f66b2c40311304cbccd.1585656143.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: 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 Reviewed-by: Rob Herring --- No changes since v6 .../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>; + }; + };