From patchwork Tue Nov 23 23:27:03 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Thomas_Wei=C3=9Fschuh?= X-Patchwork-Id: 12635563 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E4908C41535 for ; Tue, 23 Nov 2021 23:27:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240495AbhKWXa2 (ORCPT ); Tue, 23 Nov 2021 18:30:28 -0500 Received: from todd.t-8ch.de ([159.69.126.157]:41009 "EHLO todd.t-8ch.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240215AbhKWXaY (ORCPT ); Tue, 23 Nov 2021 18:30:24 -0500 From: =?utf-8?q?Thomas_Wei=C3=9Fschuh?= DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=weissschuh.net; s=mail; t=1637710029; bh=pszJ8TGazGuvxexqpltLSJ+3bJo+VwdtuFcNULoFLfw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=P/yQm2GufR400nhnNbaNAILFGeznccogxSFIBwXL8dyiEb/rnxraSYiWAK6lr3YFd 3gmFR2lCXMVV+l9hj5H7tVW0hFw+YfPnGNxo6IpWofovRVsJ/RdOBRIIjmjGn6zpBz b448HfK3eJ9nKUvfFT5QG9Ftqnv7wEzt8lvzrgh8= 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_Wei=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 v2 3/4] platform/x86: thinkpad_acpi: support force-discharge Date: Wed, 24 Nov 2021 00:27:03 +0100 Message-Id: <20211123232704.25394-4-linux@weissschuh.net> X-Mailer: git-send-email 2.34.0 In-Reply-To: <20211123232704.25394-1-linux@weissschuh.net> References: <20211123232704.25394-1-linux@weissschuh.net> MIME-Version: 1.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1637710019; l=7259; s=20211113; h=from:subject; bh=pszJ8TGazGuvxexqpltLSJ+3bJo+VwdtuFcNULoFLfw=; b=HntqHGVYa0z8SXeBLoU7xPhQqyep59YGddMAxVfR3x02Iw4UZD/I7l+gYBx56ghAcUjKJXgZT/JO Nou86YocBy+iNRbb8MMXAP1FWsiIicHV9ipAtpjGvN/ql1CSu/2Z X-Developer-Key: i=linux@weissschuh.net; a=ed25519; pk=9LP6KM4vD/8CwHW7nouRBhWLyQLcK1MkP6aTZbzUlj4= Precedence: bulk List-ID: X-Mailing-List: platform-driver-x86@vger.kernel.org This adds support for the force-discharge charge_behaviour through the embedded controller of ThinkPads. Co-developed-by: Thomas Koch Signed-off-by: Thomas Koch Co-developed-by: Nicolò Piazzalunga Signed-off-by: Nicolò Piazzalunga Signed-off-by: Thomas Weißschuh --- This patch is based on https://lore.kernel.org/platform-driver-x86/c2504700-06e9-e7d8-80f7-de90b0b6dfb5@gmail.com/ --- drivers/platform/x86/thinkpad_acpi.c | 131 ++++++++++++++++++++++++++- 1 file changed, 127 insertions(+), 4 deletions(-) diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c index 9c632df734bb..e3567cc686fa 100644 --- a/drivers/platform/x86/thinkpad_acpi.c +++ b/drivers/platform/x86/thinkpad_acpi.c @@ -9319,6 +9319,8 @@ static struct ibm_struct mute_led_driver_data = { #define SET_START "BCCS" #define GET_STOP "BCSG" #define SET_STOP "BCSS" +#define GET_DISCHARGE "BDSG" +#define SET_DISCHARGE "BDSS" enum { BAT_ANY = 0, @@ -9335,6 +9337,7 @@ enum { /* This is used in the get/set helpers */ THRESHOLD_START, THRESHOLD_STOP, + FORCE_DISCHARGE, }; struct tpacpi_battery_data { @@ -9342,6 +9345,7 @@ struct tpacpi_battery_data { int start_support; int charge_stop; int stop_support; + unsigned int charge_behaviours; }; struct tpacpi_battery_driver_data { @@ -9399,6 +9403,12 @@ static int tpacpi_battery_get(int what, int battery, int *ret) if (*ret == 0) *ret = 100; return 0; + case FORCE_DISCHARGE: + if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_DISCHARGE, ret, battery)) + return -ENODEV; + /* The force discharge status is in bit 0 */ + *ret = *ret & 0x01; + return 0; default: pr_crit("wrong parameter: %d", what); return -EINVAL; @@ -9427,12 +9437,49 @@ static int tpacpi_battery_set(int what, int battery, int value) return -ENODEV; } return 0; + case FORCE_DISCHARGE: + /* Force discharge is in bit 0, + * break on AC attach is in bit 1 (won't work on some ThinkPads), + * battery ID is in bits 8-9, 2 bits. + */ + if (ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_DISCHARGE, &ret, param))) { + pr_err("failed to set force discharge on %d", battery); + return -ENODEV; + } + return 0; default: pr_crit("wrong parameter: %d", what); return -EINVAL; } } +static int tpacpi_battery_set_validate(int what, int battery, int value) +{ + int ret, v; + + ret = tpacpi_battery_set(what, battery, value); + if (ret < 0) + return ret; + + ret = tpacpi_battery_get(what, battery, &v); + if (ret < 0) + return ret; + + if (v == value) + return 0; + + msleep(500); + + ret = tpacpi_battery_get(what, battery, &v); + if (ret < 0) + return ret; + + if (v == value) + return 0; + + return -EIO; +} + static int tpacpi_battery_probe(int battery) { int ret = 0; @@ -9445,6 +9492,8 @@ static int tpacpi_battery_probe(int battery) * 2) Check for support * 3) Get the current stop threshold * 4) Check for support + * 5) Get the current force discharge status + * 6) Check for support */ if (acpi_has_method(hkey_handle, GET_START)) { if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, &ret, battery)) { @@ -9481,10 +9530,25 @@ static int tpacpi_battery_probe(int battery) return -ENODEV; } } - pr_info("battery %d registered (start %d, stop %d)", - battery, - battery_info.batteries[battery].charge_start, - battery_info.batteries[battery].charge_stop); + if (acpi_has_method(hkey_handle, GET_DISCHARGE)) { + if (ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_DISCHARGE, &ret, battery))) { + pr_err("Error probing battery discharge; %d\n", battery); + return -ENODEV; + } + /* Support is marked in bit 8 */ + if (ret & BIT(8)) + battery_info.batteries[battery].charge_behaviours |= + BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE); + } + + battery_info.batteries[battery].charge_behaviours |= + BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO); + + pr_info("battery %d registered (start %d, stop %d, behaviours: 0x%x)\n", + battery, + battery_info.batteries[battery].charge_start, + battery_info.batteries[battery].charge_stop, + battery_info.batteries[battery].charge_behaviours); return 0; } @@ -9619,6 +9683,28 @@ static ssize_t charge_control_end_threshold_show(struct device *device, return tpacpi_battery_show(THRESHOLD_STOP, device, buf); } +static ssize_t charge_behaviour_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + enum power_supply_charge_behaviour active = POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO; + struct power_supply *supply = to_power_supply(dev); + unsigned int available; + int ret, battery; + + battery = tpacpi_battery_get_id(supply->desc->name); + available = battery_info.batteries[battery].charge_behaviours; + + if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE)) { + if (tpacpi_battery_get(FORCE_DISCHARGE, battery, &ret)) + return -ENODEV; + if (ret) + active = POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE; + } + + return power_supply_charge_behaviour_show(dev, available, active, buf); +} + static ssize_t charge_control_start_threshold_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) @@ -9633,8 +9719,44 @@ static ssize_t charge_control_end_threshold_store(struct device *dev, return tpacpi_battery_store(THRESHOLD_STOP, dev, buf, count); } +static ssize_t charge_behaviour_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct power_supply *supply = to_power_supply(dev); + int selected, battery, ret = 0; + unsigned int available; + + battery = tpacpi_battery_get_id(supply->desc->name); + available = battery_info.batteries[battery].charge_behaviours; + selected = power_supply_charge_behaviour_parse(available, buf); + + if (selected < 0) + return selected; + + switch (selected) { + case POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO: + if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE)) + ret = tpacpi_battery_set_validate(FORCE_DISCHARGE, battery, 0); + if (ret < 0) + return ret; + break; + case POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE: + ret = tpacpi_battery_set_validate(FORCE_DISCHARGE, battery, 1); + if (ret < 0) + return ret; + break; + default: + dev_err(dev, "Unexpected charge behaviour: %d\n", selected); + return -EINVAL; + } + + return count; +} + static DEVICE_ATTR_RW(charge_control_start_threshold); static DEVICE_ATTR_RW(charge_control_end_threshold); +static DEVICE_ATTR_RW(charge_behaviour); static struct device_attribute dev_attr_charge_start_threshold = __ATTR( charge_start_threshold, 0644, @@ -9653,6 +9775,7 @@ static struct attribute *tpacpi_battery_attrs[] = { &dev_attr_charge_control_end_threshold.attr, &dev_attr_charge_start_threshold.attr, &dev_attr_charge_stop_threshold.attr, + &dev_attr_charge_behaviour.attr, NULL, };