From patchwork Fri Dec 3 13:29:57 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bartosz Golaszewski X-Patchwork-Id: 520672 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 200F2C433FE for ; Fri, 3 Dec 2021 13:30:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1352445AbhLCNdv (ORCPT ); Fri, 3 Dec 2021 08:33:51 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39464 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1352253AbhLCNdu (ORCPT ); Fri, 3 Dec 2021 08:33:50 -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 7A68BC06174A for ; Fri, 3 Dec 2021 05:30:26 -0800 (PST) Received: by mail-wr1-x434.google.com with SMTP id c4so5715079wrd.9 for ; Fri, 03 Dec 2021 05:30:26 -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=5cubeU/IGRkNU9acHT4VX/9BUBtA1J5/dj0OBDkz2F1HyO2sQueMUfw1/ql44IAulH 2gZbn2KwPKwXy9vgQTNSqHaygJQGidbRkroYjtqrA49+A+pO4dpcPJdHngUUsHcfTZe4 hqnQ2L3ut0SfjIcDRnBsOuRiZBIGls+SJNyIu6bBM7Ob9DU8UN0InoFgzvPxVJA3MqRc 1ZQXxfO7Bwz2iTlpxKY0GH397022Ea4DNG7oM++xJfjbyRW+qAtvCsOABQFAqBer5Pb9 5+YenZeDvmEnT3/DizCoe9K6KGl5pxujnQmfBgOMHuUFdJbVR2bb2vmY9cBJ5UGOrLMo uMMQ== 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=sAohitkQoLxEncSxoZOFiWbh9C17gkjD6q0ReWe1glLipFHyQbr1Wa9Cjs+VevHuGj zBlRmHPXxqwAb3Jua9gp0RFRuiPjaKamO9W3Ud3g0h00UyIXJYoy47sTaV8GMM5rlWoi bSdSOWH9reIJEM4ESH3x9bx1Wy+8/SZ/KTW3NeXyO4kgardk3oY9tNGkeug9nzhi9JqR a42hUVzLYUvceIqEpEUGPZ4Ch0Q0GrCP1sNWlQx2COAwOWs1zGpBo98ISMVwMQKkwo1A ia1R7mxTlAzVVFs6UxJoZRvmM5xjn+R3DirGStHFPzWK69Xr+CGOBaZcebjJlttMhCl3 fqmQ== X-Gm-Message-State: AOAM530B5eBuCWye5hwMbO47SC260CoWZiC8yKhBxxRlUQMHUF3y8rc8 tmkeog0p6NjsVhHCKBG/PJ0U1c8FAZs/5Fhj X-Google-Smtp-Source: ABdhPJwNXyVIxcA2xd8CTeTMpCouQ9RuPhwFYijQnlniWxOxz4aa6kCRMJikbX7hAwoiUQ80k0TqmQ== X-Received: by 2002:a5d:52c2:: with SMTP id r2mr22096420wrv.548.1638538225033; Fri, 03 Dec 2021 05:30:25 -0800 (PST) Received: from debian-brgl.home ([2a01:cb1d:334:ac00:7d50:ff5:f5c1:e225]) by smtp.gmail.com with ESMTPSA id j11sm2755910wrt.3.2021.12.03.05.30.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 03 Dec 2021 05:30:24 -0800 (PST) From: Bartosz Golaszewski To: Kent Gibson , Linus Walleij , Andy Shevchenko , Shuah Khan , Geert Uytterhoeven , Viresh Kumar Cc: linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, Bartosz Golaszewski Subject: [PATCH v12 1/7] gpiolib: provide gpiod_remove_hogs() Date: Fri, 3 Dec 2021 14:29:57 +0100 Message-Id: <20211203133003.31786-2-brgl@bgdev.pl> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20211203133003.31786-1-brgl@bgdev.pl> References: <20211203133003.31786-1-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 */