From patchwork Wed Sep 13 11:49:57 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bartosz Golaszewski X-Patchwork-Id: 13382899 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 7490FEDEC4E for ; Wed, 13 Sep 2023 11:50:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233040AbjIMLuZ (ORCPT ); Wed, 13 Sep 2023 07:50:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47118 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240522AbjIMLuY (ORCPT ); Wed, 13 Sep 2023 07:50:24 -0400 Received: from mail-wr1-x42d.google.com (mail-wr1-x42d.google.com [IPv6:2a00:1450:4864:20::42d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7F41619AD for ; Wed, 13 Sep 2023 04:50:20 -0700 (PDT) Received: by mail-wr1-x42d.google.com with SMTP id ffacd0b85a97d-31fc91d5ca6so472951f8f.0 for ; Wed, 13 Sep 2023 04:50:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bgdev-pl.20230601.gappssmtp.com; s=20230601; t=1694605819; x=1695210619; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=YzyriHXDyGfsqSRGhB6U9l6fcpz9mRdaLbPmEard1K0=; b=wlAimHdr0JCDmOb03eTk5kgHiJqcEUNDbeZJ17Ujyb8Bulg1333oDjT+W/JAqjYg5R nAT7fWijaClkmMZOXkVBGTtoluxqI6Z0z7OhNUjguWteV4O2JZCeVrhkz5YKjTyz7iZl d0tWbaipDjCQUMogpTM30YSWslaRmlF1S7Xlw7EzgcyXsmValJ9zR/vPu8lb4CAnddEh IFK5uFQXqT6ZlZ1wE8PeibMEnIb6wX2KFbNuVnMuEvTkV3454cGKU6kAoKfObFQzlqFx cONcCEmSZnvbMzK9tno4pPDzt/8IN91qnFHwixCtechAHiD8MGhlyS+jWXl8kzIv/y7Y A3uw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1694605819; x=1695210619; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=YzyriHXDyGfsqSRGhB6U9l6fcpz9mRdaLbPmEard1K0=; b=rISPKZO0BLEuRc1Lsx5xKrnCAqztMCbJOL/pFsZC2sO/TebMk9V0G9mZREZkUda1QT vRqzohzp5yFrVGK15TGeJ27MPxJV3vnS+/Pt9xguVkpunjyW97UOSduL7+r5P0vPswPD hA+y93CFE8S3957EmJOQqFtoz0i5mmVdjv9LnwcjdiY8FbYWVsfssZy1S5UNeGHUKXi2 UvH3IGfZK3ZI22Iy+EbkVTHbFTMMd/efMkg6M9RXyW+AeY0RUP4HarURdOhgUFnrM68a vfCbo1wU6xHuBQMM50fNyp5hkatuCG2RzTWUwGVtcFe1r/+s0x6tzbP3v4l2NH/CnZWF amlQ== X-Gm-Message-State: AOJu0Yx9FT6DNqtobLHEhEo5Qk6ZH+l2SOEmxXhJfjbHl1oqKMTYIQoM wYTWcIfaovT6Migl4WQeinZigA== X-Google-Smtp-Source: AGHT+IHc3Nnqh7FxXn5j82zlMwGGyFk0UEacPknUOdO1EfjviMuMeXi35mpFtRpdkqCvV2719fQtUA== X-Received: by 2002:a5d:620a:0:b0:313:f61c:42ab with SMTP id y10-20020a5d620a000000b00313f61c42abmr1731997wru.56.1694605818963; Wed, 13 Sep 2023 04:50:18 -0700 (PDT) Received: from brgl-uxlite.home ([2a01:cb1d:334:ac00:3b50:bca5:a754:7463]) by smtp.gmail.com with ESMTPSA id j14-20020adfd20e000000b0031fc4c31d77sm1932689wrh.88.2023.09.13.04.50.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 13 Sep 2023 04:50:18 -0700 (PDT) From: Bartosz Golaszewski To: Linus Walleij , Andy Shevchenko , Ulf Hansson , Paul Cercueil , Harvey Hunt , Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Daniel Scally , Hans de Goede , Mark Gross , Heiner Kallweit Cc: linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mmc@vger.kernel.org, linux-mips@vger.kernel.org, linux-mtd@lists.infradead.org, platform-driver-x86@vger.kernel.org, Bartosz Golaszewski Subject: [PATCH 1/5] gpiolib: provide gpiod_set_active_[low/high]() Date: Wed, 13 Sep 2023 13:49:57 +0200 Message-Id: <20230913115001.23183-2-brgl@bgdev.pl> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230913115001.23183-1-brgl@bgdev.pl> References: <20230913115001.23183-1-brgl@bgdev.pl> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: platform-driver-x86@vger.kernel.org From: Bartosz Golaszewski Out current interface for changing line polarity is quite cumbersome to use as it only "toggles" the current state instead of deterministically setting it. Because of that all but one user in the kernel first need check the current state anyway. Let's provide two new functions that allow users to set this value explicitly with the aim of removing the existing function. Signed-off-by: Bartosz Golaszewski --- drivers/gpio/gpiolib.c | 22 ++++++++++++++++++++++ include/linux/gpio/consumer.h | 14 ++++++++++++++ 2 files changed, 36 insertions(+) diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index edffa0d2acaa..131965814a7c 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -2725,6 +2725,28 @@ void gpiod_toggle_active_low(struct gpio_desc *desc) } EXPORT_SYMBOL_GPL(gpiod_toggle_active_low); +/** + * gpiod_set_active_low() - set the GPIO as active-low + * @desc: the GPIO descriptor to set the active-low setting for + */ +void gpiod_set_active_low(struct gpio_desc *desc) +{ + VALIDATE_DESC_VOID(desc); + set_bit(FLAG_ACTIVE_LOW, &desc->flags); +} +EXPORT_SYMBOL_GPL(gpiod_set_active_low); + +/** + * gpiod_set_active_high() - set the GPIO as active-high + * @desc: the GPIO descriptor to set the active-low setting for + */ +void gpiod_set_active_high(struct gpio_desc *desc) +{ + VALIDATE_DESC_VOID(desc); + clear_bit(FLAG_ACTIVE_LOW, &desc->flags); +} +EXPORT_SYMBOL_GPL(gpiod_set_active_high); + static int gpio_chip_get_value(struct gpio_chip *gc, const struct gpio_desc *desc) { return gc->get ? gc->get(gc, gpio_chip_hwgpio(desc)) : -EIO; diff --git a/include/linux/gpio/consumer.h b/include/linux/gpio/consumer.h index 6cc345440a5b..ddbf0d8e4a75 100644 --- a/include/linux/gpio/consumer.h +++ b/include/linux/gpio/consumer.h @@ -160,6 +160,8 @@ int gpiod_set_raw_array_value_cansleep(unsigned int array_size, int gpiod_set_config(struct gpio_desc *desc, unsigned long config); int gpiod_set_debounce(struct gpio_desc *desc, unsigned int debounce); void gpiod_toggle_active_low(struct gpio_desc *desc); +void gpiod_set_active_low(struct gpio_desc *desc); +void gpiod_set_active_high(struct gpio_desc *desc); int gpiod_is_active_low(const struct gpio_desc *desc); int gpiod_cansleep(const struct gpio_desc *desc); @@ -499,6 +501,18 @@ static inline void gpiod_toggle_active_low(struct gpio_desc *desc) WARN_ON(desc); } +static inline void gpiod_set_active_low(struct gpio_desc *desc +{ + /* GPIO can never have been requested */ + WARN_ON(desc); +} + +static inline void gpiod_set_active_high(struct gpio_desc *desc) +{ + /* GPIO can never have been requested */ + WARN_ON(desc); +} + static inline int gpiod_is_active_low(const struct gpio_desc *desc) { /* GPIO can never have been requested */