From patchwork Tue Nov 30 15:41:22 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bartosz Golaszewski X-Patchwork-Id: 517064 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 74C47C433FE for ; Tue, 30 Nov 2021 15:41:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239199AbhK3Poy (ORCPT ); Tue, 30 Nov 2021 10:44:54 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44850 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239067AbhK3Pox (ORCPT ); Tue, 30 Nov 2021 10:44:53 -0500 Received: from mail-wm1-x334.google.com (mail-wm1-x334.google.com [IPv6:2a00:1450:4864:20::334]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3382FC061756 for ; Tue, 30 Nov 2021 07:41:34 -0800 (PST) Received: by mail-wm1-x334.google.com with SMTP id y196so17834551wmc.3 for ; Tue, 30 Nov 2021 07:41:34 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bgdev-pl.20210112.gappssmtp.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=sS1opnsxYro85V5S3ivgztdl1gAyjYFuzaHv2So6/ZM=; b=MnvKrF98X5TbJ7Rk6jhDx0IGnySKIostGPUKQDBs1J5fP7gDzkyIi8aParbRmZ6TaE +ihnvLjHON1gwlMykcsn2gvB4cimMh04GPK15fx0O7E43uEp6et4Xc/H8WibLl5VH2xM 6ndjT8b+tlw2k9WPwGvHuQ01Rpg84WaiJPZjIkTet07D9S0gvSaaMtfY12iO4lG/JGZz WQYRSJ6ORe0CH+mvellEtP3xxUcKkKDhJLh7EkUJSSsmZvs3Pr847OLGCfKv9zj+Daa5 YVcXIpdfRm3eYEeXarPu5QqeEVnhavdIQNEEHmZJe/P5UXt53XkTjE4e3DXIm5DACdB5 aUWw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=sS1opnsxYro85V5S3ivgztdl1gAyjYFuzaHv2So6/ZM=; b=TYX2+XfrJ3BjRo8rbi7wnsc8+DlEfuo8o4LFRCDdxZ2DbhY9VhidNJvIu9BgCxAFVn hCbePQUA+owGu7urS7ufpvl40ynGcKa45Kes8+xVtIhQPoSwZAV6eoI5ESL+KZnP7pH3 nIMZMHgQz06SRBnX+yZYeyBm12vCrF7wvOS6npn5zbLjx+j7xKovXBPrLABZxueNXqgU E/M439NFdFaCeJpaN4jYm9Z0vuH0ypsavU6bDoKdmppyTNUJHIgFYrbMY9jfz21VTkpS PpNegAffAJebPuJrJ8IZ1WnQ8XPnIoDiA0grKkgldtyoaIA6MIWP2tvh4YVe2rULca6j iyQw== X-Gm-Message-State: AOAM5311pMRomiOJd2jEeEioqmT0bdrmptR60tLPWkIsNLweNJ5ky1xy w/Y+KFgSdOQjs2TbQGw5bVQvxfLWDsKJkWuz X-Google-Smtp-Source: ABdhPJwxyU9Jel01LTbZMRFqp7vMf79S5T678a6nBbcvKBPcgdpobt0ijvejLEVPmZeDlRkPSZm0Sw== X-Received: by 2002:a05:600c:b43:: with SMTP id k3mr150831wmr.159.1638286892688; Tue, 30 Nov 2021 07:41:32 -0800 (PST) Received: from debian-brgl.home ([2a01:cb1d:334:ac00:7d50:ff5:f5c1:e225]) by smtp.gmail.com with ESMTPSA id l2sm2962792wmq.42.2021.11.30.07.41.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 30 Nov 2021 07:41:32 -0800 (PST) From: Bartosz Golaszewski To: Kent Gibson , Linus Walleij , Andy Shevchenko , Shuah Khan , Geert Uytterhoeven Cc: linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, Bartosz Golaszewski Subject: [PATCH v11 1/6] gpiolib: provide gpiod_remove_hogs() Date: Tue, 30 Nov 2021 16:41:22 +0100 Message-Id: <20211130154127.12272-2-brgl@bgdev.pl> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20211130154127.12272-1-brgl@bgdev.pl> References: <20211130154127.12272-1-brgl@bgdev.pl> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org Currently all users of gpiod_add_hogs() call it only once at system init so there never was any need for a mechanism allowing to remove them. Now the upcoming gpio-sim will need to tear down chips with hogged lines so provide a function that allows to remove hogs. Signed-off-by: Bartosz Golaszewski --- drivers/gpio/gpiolib.c | 11 +++++++++++ include/linux/gpio/machine.h | 2 ++ 2 files changed, 13 insertions(+) diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index abfbf546d159..22b98a590a88 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -3540,6 +3540,17 @@ void gpiod_add_hogs(struct gpiod_hog *hogs) } EXPORT_SYMBOL_GPL(gpiod_add_hogs); +void gpiod_remove_hogs(struct gpiod_hog *hogs) +{ + struct gpiod_hog *hog; + + mutex_lock(&gpio_machine_hogs_mutex); + for (hog = &hogs[0]; hog->chip_label; hog++) + list_del(&hog->list); + mutex_unlock(&gpio_machine_hogs_mutex); +} +EXPORT_SYMBOL_GPL(gpiod_remove_hogs); + static struct gpiod_lookup_table *gpiod_find_lookup_table(struct device *dev) { const char *dev_id = dev ? dev_name(dev) : NULL; diff --git a/include/linux/gpio/machine.h b/include/linux/gpio/machine.h index d755e529c1e3..2647dd10b541 100644 --- a/include/linux/gpio/machine.h +++ b/include/linux/gpio/machine.h @@ -100,6 +100,7 @@ void gpiod_add_lookup_table(struct gpiod_lookup_table *table); void gpiod_add_lookup_tables(struct gpiod_lookup_table **tables, size_t n); void gpiod_remove_lookup_table(struct gpiod_lookup_table *table); void gpiod_add_hogs(struct gpiod_hog *hogs); +void gpiod_remove_hogs(struct gpiod_hog *hogs); #else /* ! CONFIG_GPIOLIB */ static inline void gpiod_add_lookup_table(struct gpiod_lookup_table *table) {} @@ -108,6 +109,7 @@ void gpiod_add_lookup_tables(struct gpiod_lookup_table **tables, size_t n) {} static inline void gpiod_remove_lookup_table(struct gpiod_lookup_table *table) {} static inline void gpiod_add_hogs(struct gpiod_hog *hogs) {} +static inline void gpiod_remove_hogs(struct gpiod_hog *hogs) {} #endif /* CONFIG_GPIOLIB */ #endif /* __LINUX_GPIO_MACHINE_H */