Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 855C4C433EF for ; Sat, 13 Nov 2021 10:44:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6224360698 for ; Sat, 13 Nov 2021 10:44:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235861AbhKMKph (ORCPT ); Sat, 13 Nov 2021 05:45:37 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55520 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235816AbhKMKpa (ORCPT ); Sat, 13 Nov 2021 05:45:30 -0500 Received: from todd.t-8ch.de (todd.t-8ch.de [IPv6:2a01:4f8:c010:41de::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7AEF7C061766; Sat, 13 Nov 2021 02:42:38 -0800 (PST) From: =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=weissschuh.net; s=mail; t=1636800156; bh=lvDFqz8JQafjLCe0upSmVTphFfWrJ150vakiSDVAzYk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bwPKh/IdeXu+QB2HHcfkpAfzWuPP+y1Ib58MrL8VbVeNvup4p64u26JA/B4JNs+Kf TXe4Y7Hy5hAFxRaBtX/JN4M9G5HOEmGc0LmdNMFDbwWy73sFfRPhoQfo0KGLmC3fIt PV10+saopaxxtLr8Ok356oXV/tVE+f2kvENgYi4E= To: linux-pm@vger.kernel.org, Sebastian Reichel , ibm-acpi-devel@lists.sourceforge.net, platform-driver-x86@vger.kernel.org, Mark Gross , Hans de Goede , Henrique de Moraes Holschuh Cc: =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= , linux-kernel@vger.kernel.org, linrunner@gmx.net, bberg@redhat.com, hadess@hadess.net, markpearson@lenovo.com, nicolopiazzalunga@gmail.com, njoshi1@lenovo.com, smclt30p@gmail.com Subject: [PATCH 4/4] platform/x86: thinkpad_acpi: support inhibit-charge Date: Sat, 13 Nov 2021 11:42:25 +0100 Message-Id: <20211113104225.141333-5-linux@weissschuh.net> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20211113104225.141333-1-linux@weissschuh.net> References: <20211113104225.141333-1-linux@weissschuh.net> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This adds support for the inhibit-charge charge_behaviour through the embedded controller of ThinkPads. Signed-off-by: Thomas Weißschuh --- This patch is based on https://lore.kernel.org/platform-driver-x86/d2808930-5840-6ffb-3a59-d235cdb1fe16@gmail.com/ --- drivers/platform/x86/thinkpad_acpi.c | 55 +++++++++++++++++++++++++++- 1 file changed, 53 insertions(+), 2 deletions(-) diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c index e8c98e9aff71..7cd6475240b2 100644 --- a/drivers/platform/x86/thinkpad_acpi.c +++ b/drivers/platform/x86/thinkpad_acpi.c @@ -9321,6 +9321,8 @@ static struct ibm_struct mute_led_driver_data = { #define SET_STOP "BCSS" #define GET_DISCHARGE "BDSG" #define SET_DISCHARGE "BDSS" +#define GET_INHIBIT "PSSG" +#define SET_INHIBIT "BICS" enum { BAT_ANY = 0, @@ -9338,6 +9340,7 @@ enum { THRESHOLD_START, THRESHOLD_STOP, FORCE_DISCHARGE, + INHIBIT_CHARGE, }; struct tpacpi_battery_data { @@ -9409,6 +9412,13 @@ static int tpacpi_battery_get(int what, int battery, int *ret) /* The force discharge status is in bit 0 */ *ret = *ret & 0x01; return 0; + case INHIBIT_CHARGE: + /* This is actually reading peak shift state, like tpacpi-bat does */ + if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_INHIBIT, ret, battery)) + return -ENODEV; + /* The inhibit charge status is in bit 0 */ + *ret = *ret & 0x01; + return 0; default: pr_crit("wrong parameter: %d", what); return -EINVAL; @@ -9447,6 +9457,22 @@ static int tpacpi_battery_set(int what, int battery, int value) return -ENODEV; } return 0; + case INHIBIT_CHARGE: + /* When setting inhibit charge, we set a default value of + * always breaking on AC detach and the effective time is set to + * be permanent. + * The battery ID is in bits 4-5, 2 bits, + * the effective time is in bits 8-23, 2 bytes. + * A time of FFFF indicates forever. + */ + param = value; + param |= battery << 4; + param |= 0xFFFF << 8; + if (ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_INHIBIT, &ret, param))) { + pr_err("failed to set inhibit charge on %d", battery); + return -ENODEV; + } + return 0; default: pr_crit("wrong parameter: %d", what); return -EINVAL; @@ -9467,6 +9493,8 @@ static int tpacpi_battery_probe(int battery) * 4) Check for support * 5) Get the current force discharge status * 6) Check for support + * 7) Get the current inhibit charge status + * 8) Check for support */ if (acpi_has_method(hkey_handle, GET_START)) { if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, &ret, battery)) { @@ -9513,6 +9541,16 @@ static int tpacpi_battery_probe(int battery) battery_info.batteries[battery].charge_behaviours |= BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE); } + if (acpi_has_method(hkey_handle, GET_INHIBIT)) { + if (ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_INHIBIT, &ret, battery))) { + pr_err("Error probing battery inhibit charge; %d\n", battery); + return -ENODEV; + } + /* Support is marked in bit 5 */ + if (ret & BIT(5)) + battery_info.batteries[battery].charge_behaviours |= + BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE); + } battery_info.batteries[battery].charge_behaviours |= BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO); @@ -9673,6 +9711,11 @@ static ssize_t charge_behaviour_show(struct device *dev, return -ENODEV; if (ret) active = POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE; + } else if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE)) { + if (tpacpi_battery_get(INHIBIT_CHARGE, battery, &ret)) + return -ENODEV; + if (ret) + active = POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE; } return power_supply_charge_behaviour_show(dev, available, active, buf); @@ -9710,12 +9753,20 @@ static ssize_t charge_behaviour_store(struct device *dev, switch (selected) { case POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO: ret = tpacpi_battery_set(FORCE_DISCHARGE, battery, 0); - if (ret < 0) + ret = tpacpi_battery_set(INHIBIT_CHARGE, battery, 0) || ret; + if (ret) return ret; break; case POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE: ret = tpacpi_battery_set(FORCE_DISCHARGE, battery, 1); - if (ret < 0) + ret = tpacpi_battery_set(INHIBIT_CHARGE, battery, 0) || ret; + if (ret) + return ret; + break; + case POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE: + ret = tpacpi_battery_set(FORCE_DISCHARGE, battery, 0); + ret = tpacpi_battery_set(INHIBIT_CHARGE, battery, 1) || ret; + if (ret) return ret; break; default: -- 2.33.1