From patchwork Sat Nov 13 10:42:23 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: 12617641 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 AE24CC433FE for ; Sat, 13 Nov 2021 10:42:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8660B610A1 for ; Sat, 13 Nov 2021 10:42:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235828AbhKMKpc (ORCPT ); Sat, 13 Nov 2021 05:45:32 -0500 Received: from todd.t-8ch.de ([159.69.126.157]:59913 "EHLO todd.t-8ch.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235804AbhKMKpa (ORCPT ); Sat, 13 Nov 2021 05:45:30 -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=1636800156; bh=aTqKITwe2LA7y1VMDsmOTFPBsA/vzvyEueKa2dGlxMk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ln286Z6jptypnEoyobbtP9PxcPsWu8r/CKukBuUJkpJlubmpTSIXJf+RzbRNShdsu gJE8y00lA+rNzGD29LBgmuRg5TU7yewEpdrv1p5YRy8mkkzt82tZPsvqdIXwYYcPGi iwdb27ZTDLmhYeNN7WWcnbreYbdPkPG60lRd04TQ= 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 2/4] power: supply: add helpers for charge_behaviour sysfs Date: Sat, 13 Nov 2021 11:42:23 +0100 Message-Id: <20211113104225.141333-3-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 Precedence: bulk List-ID: X-Mailing-List: platform-driver-x86@vger.kernel.org These helper functions can be used by drivers to implement their own sysfs-attributes. This is useful for ACPI-drivers extending the default ACPI-battery with their own charge_behaviour attributes. Signed-off-by: Thomas Weißschuh --- drivers/power/supply/power_supply_sysfs.c | 51 +++++++++++++++++++++++ include/linux/power_supply.h | 9 ++++ 2 files changed, 60 insertions(+) diff --git a/drivers/power/supply/power_supply_sysfs.c b/drivers/power/supply/power_supply_sysfs.c index c3d7cbcd4fad..171341bcef1d 100644 --- a/drivers/power/supply/power_supply_sysfs.c +++ b/drivers/power/supply/power_supply_sysfs.c @@ -133,6 +133,12 @@ static const char * const POWER_SUPPLY_SCOPE_TEXT[] = { [POWER_SUPPLY_SCOPE_DEVICE] = "Device", }; +static const char * const POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT[] = { + [POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO] = "auto", + [POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE] = "inhibit-charge", + [POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE] = "force-discharge", +}; + static struct power_supply_attr power_supply_attrs[] = { /* Properties of type `int' */ POWER_SUPPLY_ENUM_ATTR(STATUS), @@ -226,6 +232,51 @@ static enum power_supply_property dev_attr_psp(struct device_attribute *attr) return to_ps_attr(attr) - power_supply_attrs; } +ssize_t power_supply_charge_behaviour_show(struct device *dev, + unsigned int available_behaviours, + enum power_supply_charge_behaviour current_behaviour, + char *buf) +{ + bool match = false, available, active; + ssize_t count = 0; + int i; + + for (i = 0; i < ARRAY_SIZE(POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT); i++) { + available = available_behaviours & BIT(i); + active = i == current_behaviour; + + if (available && active) { + count += sprintf(buf + count, "[%s] ", + POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT[i]); + match = true; + } else if (available) { + count += sprintf(buf + count, "%s ", + POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT[i]); + } + } + + if (!match) { + dev_warn(dev, "driver reporting unsupported charge behaviour\n"); + return -EINVAL; + } + + if (count) + buf[count - 1] = '\n'; + + return count; +} +EXPORT_SYMBOL_GPL(power_supply_charge_behaviour_show); + +int power_supply_charge_behaviour_parse(unsigned int available_behaviours, const char *buf) +{ + int i = sysfs_match_string(POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT, buf); + + if (available_behaviours & BIT(i)) + return i; + return -EINVAL; +} +EXPORT_SYMBOL_GPL(power_supply_charge_behaviour_parse); + static ssize_t power_supply_show_usb_type(struct device *dev, const struct power_supply_desc *desc, union power_supply_propval *value, diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h index 70c333e86293..71f0379c2af8 100644 --- a/include/linux/power_supply.h +++ b/include/linux/power_supply.h @@ -546,4 +546,13 @@ static inline void power_supply_remove_hwmon_sysfs(struct power_supply *psy) {} #endif +#ifdef CONFIG_SYSFS +ssize_t power_supply_charge_behaviour_show(struct device *dev, + unsigned int available_behaviours, + enum power_supply_charge_behaviour behaviour, + char *buf); + +int power_supply_charge_behaviour_parse(unsigned int available_behaviours, const char *buf); +#endif + #endif /* __LINUX_POWER_SUPPLY_H__ */