From patchwork Wed Nov 24 11:42:53 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bartosz Golaszewski X-Patchwork-Id: 517280 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 02AAAC433FE for ; Wed, 24 Nov 2021 11:43:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241726AbhKXLqR (ORCPT ); Wed, 24 Nov 2021 06:46:17 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39986 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241730AbhKXLqO (ORCPT ); Wed, 24 Nov 2021 06:46:14 -0500 Received: from mail-wr1-x434.google.com (mail-wr1-x434.google.com [IPv6:2a00:1450:4864:20::434]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1539DC061714 for ; Wed, 24 Nov 2021 03:43:05 -0800 (PST) Received: by mail-wr1-x434.google.com with SMTP id b12so3674281wrh.4 for ; Wed, 24 Nov 2021 03:43:05 -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=ukqZb6Df8wk2BR7+RB3VNpoAiHEzybZ5wK7naDQW1uDkTqo/5SeXbH0bluZIgIK/y5 yHsVSJeCbWnimbjYDhksjDQEBETXtrudYf0Rluz5BIrua02DG0wrDv9v6qVpB07EQFCC HgiJtMXCKAQ5FxV2r15Xq9wFWV38uVKAktJ1CK9RmcskvqAZ+0FuM60ay0BS/7jXJBOn rO1P/jEIRTtoJMiz2A6DC2x4WA0BO7bGQ8JcfNtz3m7tf3lFrvS0HdQsK8u0wJAMcJfG 0FB6mmWh1sJJ54bScBM79u8uhThDWiNoGbBfp8GfZA7XVvBMoQICjkcAUX1X9Igd0FJ0 81jA== 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=56J52e6nD7vwG7J8hoCB3FZumilkJVKWYlpnc4G8r5zT/QelWRBQqFr+5otybQVgnt elr/axjWT8sf6XibjQNsi7c7i4NwMno3K7Ac70CuhzgJzpB3sI8hMKLUF+Dx9Gq9xORE MjQ9fuIpNBWKIHABtg4SLOcX6bkXKqrstHbIh3VXzJ/qybeXJ46TZOzj3Hf16zQG4Ra+ wTc+9YvZDK0MxD9+nA6lR90RFINAznA1HFmLsPd8nJtRyPMYKm4F56QLE2Hh8ModQJgB vaBU/Lc72WNAeqO2Ps9+schb0Nj3GXtQSQUEFrMcktr9TxFkecgUOkpJv4SrlvU7fzRu BfEA== X-Gm-Message-State: AOAM530E0ZBk70wPAkm9HzOfuy8IyuP5Yst/LW62kPgZCWbxuG0xqdCK 5R+6tDF4jzzbY7jxf2gpy8zZ+A== X-Google-Smtp-Source: ABdhPJxKAZZnUDjolRDhLnzjAWh38EBmKg2rTlNyfnvjqE+5got5d7PmwHEdZRTCcGycM0SHq37agg== X-Received: by 2002:adf:f88f:: with SMTP id u15mr15957633wrp.18.1637754182346; Wed, 24 Nov 2021 03:43:02 -0800 (PST) Received: from debian-brgl.home ([2a01:cb1d:334:ac00:7d50:ff5:f5c1:e225]) by smtp.gmail.com with ESMTPSA id s63sm5165173wme.22.2021.11.24.03.43.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 24 Nov 2021 03:43:01 -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 v10 1/5] gpiolib: provide gpiod_remove_hogs() Date: Wed, 24 Nov 2021 12:42:53 +0100 Message-Id: <20211124114257.19878-2-brgl@bgdev.pl> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20211124114257.19878-1-brgl@bgdev.pl> References: <20211124114257.19878-1-brgl@bgdev.pl> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@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 */