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Wed, 17 Nov 2021 13:20:42 -0500 Message-ID: Date: Wed, 17 Nov 2021 13:20:41 -0500 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.2.0 Subject: Re: [External] Re: [PATCH 0/4] power: supply: add charge_behaviour property (force-discharge, inhibit-charge) Content-Language: en-US To: =?UTF-8?Q?Thomas_Wei=c3=9fschuh?= , Thomas Koch CC: , Sebastian Reichel , , , Mark Gross , Hans de Goede , Henrique de Moraes Holschuh , , , , , , References: <20211113104225.141333-1-linux@weissschuh.net> <9cebba85-f399-a7aa-91f7-237852338dc5@gmx.net> From: Mark Pearson In-Reply-To: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8bit X-Originating-IP: [10.38.110.13] X-ClientProxiedBy: reswpmail04.lenovo.com (10.62.32.23) To reswpmail01.lenovo.com (10.62.32.20) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 5a1108a5-c64b-44cf-44e8-08d9a9f6f935 X-MS-TrafficTypeDiagnostic: SG2PR03MB3595: X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:9508; 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X-OriginatorOrg: lenovo.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 17 Nov 2021 18:20:45.2325 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 5a1108a5-c64b-44cf-44e8-08d9a9f6f935 X-MS-Exchange-CrossTenant-Id: 5c7d0b28-bdf8-410c-aa93-4df372b16203 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=5c7d0b28-bdf8-410c-aa93-4df372b16203;Ip=[104.232.225.6];Helo=[mail.lenovo.com] X-MS-Exchange-CrossTenant-AuthSource: SG2APC01FT0047.eop-APC01.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SG2PR03MB3595 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Thomas, On 2021-11-17 12:57, Thomas Weißschuh wrote: > On 2021-11-16 17:56+0100, Thomas Koch wrote: >> thank you very much for working on this. It is high time that we leave >> external kernel modules for ThinkPads behind us. >> >> On 13.11.21 11:42, Thomas Weißschuh wrote: >>> Hi, >>> >>> this series adds support for the charge_behaviour property to the power >>> subsystem and thinkpad_acpi driver. >>> >>> As thinkpad_acpi has to use the 'struct power_supply' created by the generic >>> ACPI driver it has to rely on custom sysfs attributes instead of proper >>> power_supply properties to implement this property. >>> >>> Patch 1: Adds the power_supply documentation and basic public API >>> Patch 2: Adds helpers to power_supply core to help drivers implement the >>> charge_behaviour attribute >>> Patch 3: Adds support for force-discharge to thinkpad_acpi. >>> Patch 4: Adds support for inhibit-discharge to thinkpad_acpi. >>> >>> Patch 3 and 4 are largely taken from other patches and adapted to the new API. >>> (Links are in the patch trailer) >>> >>> Ognjen Galic, Nicolo' Piazzalunga, Thomas Koch: >>> >>> Your S-o-b is on the original inhibit_charge and force_discharge patches. >>> I would like to add you as Co-developed-by but to do that it will also require >>> your S-o-b. Could you give your sign-offs for the new patches, so you can be >>> properly attributed? >> S-o-b/Co-developed-by/Tested-by is fine with me. >> >> I tested your patches. >> >> Hardware: >> >> - ThinkPad X220, BAT0 >> - ThinkPad T450s, BAT0+BAT1 >> - ThinkPad X1C6, BAT0 >> >> Test Results: >> >> 1. force-discharge >> >> Everythings works as expected >> - Writing including disengaging w/ "auto" : OK >> - Reading: OK >> >> - Battery discharging: OK >> - Disengaging with "auto": OK >> >> 2. inhibit-charge >> >> Works as expected: >> - Writing: OK >> >> - Disengaging with "auto": OK >> >> >> Discrepancies: >> - Battery charge inhibited: BAT0 OK, BAT1 no effect e.g. continues charging >> - Reading: always returns "auto" > > I tested it on a T460s with two batteries and there inhibit-charge works > fine for both batteries. > What does not work is setting force-discharge for both batteries at the same > time. > This makes somewhat sense as on a physical level probably only one of them can > be used at a time. > > Mark Pearson: Could you confirm that this is the intended behaviour? > Confirmed - only one battery can be used with the BDSS command