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[23.128.96.18]) by mx.google.com with ESMTP id u14si6123728edq.122.2020.07.27.12.13.52; Mon, 27 Jul 2020 12:14:14 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@ti.com header.s=ti-com-17Q1 header.b=sd6cxuro; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=NONE dis=NONE) header.from=ti.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729517AbgG0SRM (ORCPT + 99 others); Mon, 27 Jul 2020 14:17:12 -0400 Received: from lelv0143.ext.ti.com ([198.47.23.248]:35642 "EHLO lelv0143.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728029AbgG0SRM (ORCPT ); Mon, 27 Jul 2020 14:17:12 -0400 Received: from lelv0265.itg.ti.com ([10.180.67.224]) by lelv0143.ext.ti.com (8.15.2/8.15.2) with ESMTP id 06RIH9ME130279; Mon, 27 Jul 2020 13:17:09 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1595873829; bh=XZn0oBqm7H2Wj3jkQ1MdF24a746Xzql/Out0DHD3Ei0=; h=Subject:To:CC:References:From:Date:In-Reply-To; b=sd6cxuro4X7zXK50zLFH5sthib96eCNth3ygm32P2ti6QW5H22B1JbmdMp/rQxEMm O/cmEqxMApkaG0briUDTvLAb4VlMuvIli9j0ClFPv/pJWJPA/AufSC/kDn0ONEd5K4 Rq3GjeinBBVvQAjrcI1CW/ZMr1I4DyZ+yMDSfCe8= Received: from DFLE115.ent.ti.com (dfle115.ent.ti.com [10.64.6.36]) by lelv0265.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 06RIH9ra027104 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Mon, 27 Jul 2020 13:17:09 -0500 Received: from DFLE115.ent.ti.com (10.64.6.36) by DFLE115.ent.ti.com (10.64.6.36) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3; Mon, 27 Jul 2020 13:17:08 -0500 Received: from fllv0040.itg.ti.com (10.64.41.20) by DFLE115.ent.ti.com (10.64.6.36) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3 via Frontend Transport; Mon, 27 Jul 2020 13:17:08 -0500 Received: from [10.250.43.45] (ileax41-snat.itg.ti.com [10.172.224.153]) by fllv0040.itg.ti.com (8.15.2/8.15.2) with ESMTP id 06RIH8R1010609; Mon, 27 Jul 2020 13:17:08 -0500 Subject: Re: [EXTERNAL] Re: [PATCH v17 2/4] dt-bindings: power: Convert battery.txt to battery.yaml To: Sebastian Reichel CC: , , , , , , , References: <20200720204400.7351-1-r-rivera-matos@ti.com> <20200720204400.7351-3-r-rivera-matos@ti.com> <20200726232440.valzl3omfbfyi75z@earth.universe> From: Ricardo Rivera-Matos Message-ID: <1a779c34-2b11-3b1a-402f-d3e61d6ccac9@ti.com> Date: Mon, 27 Jul 2020 13:17:08 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.8.0 MIME-Version: 1.0 In-Reply-To: <20200726232440.valzl3omfbfyi75z@earth.universe> Content-Type: text/plain; charset="windows-1252"; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 7/26/20 6:24 PM, Sebastian Reichel wrote: > Hi, > > On Mon, Jul 20, 2020 at 03:43:58PM -0500, Ricardo Rivera-Matos wrote: >> From: Dan Murphy >> >> Convert the battery.txt file to yaml and fix up the examples. > The examples were correct for the existing binding. What you did > is completly changing the binding description (without modifying > the code) resulting in examples and any existing users being > incorrect and code not matching up with the binding. ACK > >> Signed-off-by: Dan Murphy >> --- >> .../bindings/power/supply/battery.txt | 86 +--------- >> .../bindings/power/supply/battery.yaml | 157 ++++++++++++++++++ >> 2 files changed, 158 insertions(+), 85 deletions(-) >> create mode 100644 Documentation/devicetree/bindings/power/supply/battery.yaml >> >> diff --git a/Documentation/devicetree/bindings/power/supply/battery.txt b/Documentation/devicetree/bindings/power/supply/battery.txt >> index 5e29595edd74..a9f80cc49068 100644 >> --- a/Documentation/devicetree/bindings/power/supply/battery.txt >> +++ b/Documentation/devicetree/bindings/power/supply/battery.txt >> @@ -1,87 +1,3 @@ >> -Battery Characteristics >> - >> -The devicetree battery node provides static battery characteristics. >> -In smart batteries, these are typically stored in non-volatile memory >> -on a fuel gauge chip. The battery node should be used where there is >> -no appropriate non-volatile memory, or it is unprogrammed/incorrect. >> - >> -Upstream dts files should not include battery nodes, unless the battery >> -represented cannot easily be replaced in the system by one of a >> -different type. This prevents unpredictable, potentially harmful, >> -behavior should a replacement that changes the battery type occur >> -without a corresponding update to the dtb. >> +The contents of this file has been moved to battery.yaml >> >> 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 >> - - factory-internal-resistance-micro-ohms: battery factory internal resistance >> - - ocv-capacity-table-0: An array providing the open circuit voltage (OCV) >> - of the battery and corresponding battery capacity percent, which is used >> - to look up battery capacity according to current OCV value. And the open >> - circuit voltage unit is microvolt. >> - - ocv-capacity-table-1: Same as ocv-capacity-table-0 >> - ...... >> - - ocv-capacity-table-n: Same as ocv-capacity-table-0 >> - - ocv-capacity-celsius: An array containing the temperature in degree Celsius, >> - for each of the battery capacity lookup table. The first temperature value >> - specifies the OCV table 0, and the second temperature value specifies the >> - OCV table 1, and so on. >> - - resistance-temp-table: An array providing the temperature in degree Celsius >> - and corresponding battery internal resistance percent, which is used to look >> - up the resistance percent according to current temperature to get a accurate >> - batterty internal resistance in different temperatures. >> - >> -Battery properties are named, where possible, for the corresponding >> -elements in enum power_supply_property, defined in >> -https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/include/linux/power_supply.h >> - >> -Batteries must be referenced by chargers and/or fuel-gauges >> -using a phandle. The phandle's property should be named >> -"monitored-battery". >> - >> -Example: >> - >> - bat: battery { >> - compatible = "simple-battery"; >> - voltage-min-design-microvolt = <3200000>; >> - voltage-max-design-microvolt = <4200000>; >> - energy-full-design-microwatt-hours = <5290000>; >> - charge-full-design-microamp-hours = <1430000>; >> - precharge-current-microamp = <256000>; >> - charge-term-current-microamp = <128000>; >> - constant-charge-current-max-microamp = <900000>; >> - constant-charge-voltage-max-microvolt = <4200000>; >> - factory-internal-resistance-micro-ohms = <250000>; >> - ocv-capacity-celsius = <(-10) 0 10>; >> - ocv-capacity-table-0 = <4185000 100>, <4113000 95>, <4066000 90>, ...; >> - ocv-capacity-table-1 = <4200000 100>, <4185000 95>, <4113000 90>, ...; >> - ocv-capacity-table-2 = <4250000 100>, <4200000 95>, <4185000 90>, ...; >> - resistance-temp-table = <20 100>, <10 90>, <0 80>, <(-10) 60>; >> - }; >> - >> - charger: charger@11 { >> - .... >> - monitored-battery = <&bat>; >> - ... >> - }; >> - >> - fuel_gauge: fuel-gauge@22 { >> - .... >> - monitored-battery = <&bat>; >> - ... >> - }; >> diff --git a/Documentation/devicetree/bindings/power/supply/battery.yaml b/Documentation/devicetree/bindings/power/supply/battery.yaml >> new file mode 100644 >> index 000000000000..d7a2380b46f9 >> --- /dev/null >> +++ b/Documentation/devicetree/bindings/power/supply/battery.yaml >> @@ -0,0 +1,157 @@ >> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) >> +%YAML 1.2 >> +--- >> +$id: http://devicetree.org/schemas/power/supply/battery.yaml# >> +$schema: http://devicetree.org/meta-schemas/core.yaml# >> + >> +title: Battery Characteristics >> + >> +maintainers: >> + - Sebastian Reichel >> + >> +description: | >> + The devicetree battery node provides static battery characteristics. >> + In smart batteries, these are typically stored in non-volatile memory >> + on a fuel gauge chip. The battery node should be used where there is >> + no appropriate non-volatile memory, or it is unprogrammed/incorrect. >> + >> + Upstream dts files should not include battery nodes, unless the battery >> + represented cannot easily be replaced in the system by one of a >> + different type. This prevents unpredictable, potentially harmful, >> + behavior should a replacement that changes the battery type occur >> + without a corresponding update to the dtb. >> + >> + Battery properties are named, where possible, for the corresponding elements >> + in enum power_supply_property, defined in include/linux/power_supply.h >> + >> + Batteries must be referenced by chargers and/or fuel-gauges using a phandle. >> + The phandle's property should be named "monitored-battery". >> + >> +properties: >> + compatible: >> + const: simple-battery >> + >> + over-voltage-threshold-microvolt: >> + description: battery over-voltage limit >> + >> + re-charge-voltage-microvolt: >> + description: limit to automatically start charging again >> + >> + voltage-min-design-microvolt: >> + description: drained battery voltage >> + >> + voltage-max-design-microvolt: >> + description: fully charged battery voltage >> + >> + energy-full-design-microwatt-hours: >> + description: battery design energy >> + >> + charge-full-design-microamp-hours: >> + description: battery design capacity >> + >> + trickle-charge-current-microamp: >> + description: current for trickle-charge phase >> + >> + precharge-current-microamp: >> + description: current for pre-charge phase >> + >> + precharge-upper-limit-microvolt: >> + description: limit when to change to constant charging >> + >> + charge-term-current-microamp: >> + description: current for charge termination phase >> + >> + constant-charge-current-max-microamp: >> + description: maximum constant input current >> + >> + constant-charge-voltage-max-microvolt: >> + description: maximum constant input voltage >> + >> + factory-internal-resistance-micro-ohms: >> + description: battery factory internal resistance >> + >> + monitored-battery: >> + $ref: /schemas/types.yaml#/definitions/phandle >> + description: phandle to the battery node being monitored > monitored-battery is not a valid property of simple-battery node > (the one having compatible = "simple-battery"). It needs to be > listed in the binding _using_ simple-battery (which you did in > the bq2515x binding). Drop it. ACK > >> +required: >> + - compatible >> + >> +patternProperties: >> + '^ocv-capacity-table-[0-100]$': >> + $ref: /schemas/types.yaml#/definitions/uint32-matrix >> + description: | >> + An array providing the open circuit voltage (OCV) >> + of the battery and corresponding battery capacity percent, which is used >> + to look up battery capacity according to current OCV value. And the open >> + circuit voltage unit is microvolt. >> + maxItems: 100 >> + items: >> + items: >> + - description: open circuit voltage (OCV) in microvolts >> + - description: battery capacity percent >> + maximum: 100 > This looks ok. Sounds good > >> + '^resistance-temp-table-[0-100]$': >> + $ref: /schemas/types.yaml#/definitions/uint32-matrix >> + description: | >> + An array providing the temperature in degree Celsius >> + and corresponding battery internal resistance percent, which is used to >> + look up the resistance percent according to current temperature to get an >> + accurate batterty internal resistance in different temperatures. >> + maxItems: 100 >> + items: >> + items: >> + - description: internal resistance percent >> + - description: battery capacity percent >> + maximum: 100 > This is a single property ("resistance-temp-table") describing > a graph with temperature on one axis and battery internal resistance > on the other axis. The first cell is temperature in degree Celsius > and the second cell is internal resistance percentage. So old > example > > resistance-temp-table = <20 100>, <10 90>, <0 80>, <(-10) 60>; > > translates into > > 20? => 100% of "factory-internal-resistance-micro-ohms" > 10? => 90% of "factory-internal-resistance-micro-ohms" Okay thanks for explaining this. > >> + '^ocv-capacity-celsius-[0-100]$': >> + $ref: /schemas/types.yaml#/definitions/uint32-matrix >> + description: | >> + An array containing the temperature in degree Celsius, >> + for each of the battery capacity lookup table. >> + maxItems: 100 >> + items: >> + items: >> + - description: temperature in degree Celsius >> + - description: battery capacity percent >> + maximum: 100 > This is also incorrect. This is a single property ("ocv-capacity-celsius"), > which is the lookup table for "^ocv-capacity-table-[0-100]$". It maps > ocv-capacity tables to temperatures. Let me use the example from the > old *.txt binding again: > > ocv-capacity-celsius = <(-10) 0 10>; > ocv-capacity-table-0 = <4185000 100>, <4113000 95>, <4066000 90>, ...; > ocv-capacity-table-1 = <4200000 100>, <4185000 95>, <4113000 90>, ...; > ocv-capacity-table-2 = <4250000 100>, <4200000 95>, <4185000 90>, ...; > > -10 degree Celsius is index 0, so ocv-capacity-table-0 should be > used for -10 degrees Celsius. > > 0 degrees Celsius is index 1, so ocv-capacity-table-1 should > be used for this temperature. > > 10 degrees Celsius is index 2, so ocv-capacity-table-2 > should be used for this temperature. ACK > > -- Sebastian > >> +additionalProperties: false >> + >> +examples: >> + - | >> + power { >> + #address-cells = <1>; >> + #size-cells = <0>; >> + >> + battery: battery { >> + compatible = "simple-battery"; >> + over-voltage-threshold-microvolt = <4500000>; >> + re-charge-voltage-microvolt = <250000>; >> + voltage-min-design-microvolt = <3200000>; >> + voltage-max-design-microvolt = <4200000>; >> + energy-full-design-microwatt-hours = <5290000>; >> + charge-full-design-microamp-hours = <1430000>; >> + precharge-current-microamp = <256000>; >> + precharge-upper-limit-microvolt = <2500000>; >> + charge-term-current-microamp = <128000>; >> + constant-charge-current-max-microamp = <900000>; >> + constant-charge-voltage-max-microvolt = <4200000>; >> + factory-internal-resistance-micro-ohms = <250000>; >> + ocv-capacity-celsius-0 = <(-10) 10>; >> + ocv-capacity-table-0 = <4185000 100>, <4113000 95>, <4066000 90>; >> + resistance-temp-table-0 = <20 100>, <10 90>, <0 80>, <(-10) 60>; >> + }; >> + >> + charger@11 { >> + reg = <0x11>; >> + monitored-battery = <&battery>; >> + }; >> + >> + fuel-gauge@22 { >> + reg = <0x22>; >> + monitored-battery = <&battery>; >> + }; >> + }; >> -- >> 2.27.0