From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Wed, 21 Feb 2024 15:28:47 +0100 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by lore.white.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1rcnaY-00HKrX-3B for lore@lore.pengutronix.de; Wed, 21 Feb 2024 15:28:47 +0100 Received: from bombadil.infradead.org ([2607:7c80:54:3::133]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1rcnaY-0005uR-C2 for lore@pengutronix.de; Wed, 21 Feb 2024 15:28:46 +0100 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To: Cc:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=mRsYZ437mOJj/2wsJuyVEd2FNTdO8ZrtErYmSHJrC9U=; b=H1bv21Gkh4of9rDIki7AtofJ8O 9UlWYAhHYVEh16bRCN3vFZCDf5KT2K6sev2BKCHIsbBq3AnPRkT6UVmzudUzk159jUd9yRsUq9YP9 FCS8jvUuSTgVdeGs8fSVrUMlGJfypWBGkGY/HydG8SRkOCQJc2XWG9B8aIzixbISua9KJ5WgwuGMJ v6ZFhHsl2Dh1nygz5HiBqFE/veKBhcu0i9cxunnxI8TIYo0MDBXak2WBdOJmKfjCi6IZGtc34Zwky 6bwcQfz2Pewcz0oOAbiRQVK5uZXPDpGSmXM+Duq+mOuoZO67rSlHWS1oOGqoIM/QvkyviolhSIpBm aVjvxkIg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rcnZz-00000001Gqk-10LW; Wed, 21 Feb 2024 14:28:11 +0000 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1rcnZs-00000001Gnc-2Ox2 for barebox@lists.infradead.org; Wed, 21 Feb 2024 14:28:07 +0000 Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1rcnZp-0005bz-Vh; Wed, 21 Feb 2024 15:28:01 +0100 Received: from [2a0a:edc0:0:1101:1d::28] (helo=dude02.red.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1rcnZp-0023cQ-Io; Wed, 21 Feb 2024 15:28:01 +0100 Received: from localhost ([::1] helo=dude02.red.stw.pengutronix.de) by dude02.red.stw.pengutronix.de with esmtp (Exim 4.96) (envelope-from ) id 1rcnZp-008kpE-1Z; Wed, 21 Feb 2024 15:28:01 +0100 From: Sascha Hauer To: Barebox List Date: Wed, 21 Feb 2024 15:27:57 +0100 Message-Id: <20240221142800.1958810-2-s.hauer@pengutronix.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240221142800.1958810-1-s.hauer@pengutronix.de> References: <20240221142800.1958810-1-s.hauer@pengutronix.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240221_062804_686941_EB47F032 X-CRM114-Status: GOOD ( 12.78 ) X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "barebox" X-SA-Exim-Connect-IP: 2607:7c80:54:3::133 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.whiteo.stw.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-5.1 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_NONE, T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.2 Subject: [PATCH 1/4] gpio: add slice support X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.whiteo.stw.pengutronix.de) GPIOs are not only provided by raw register accesses but also by I2C devices. Add a slice to a gpio chip so that a gpio user can check if the slice is acquired before using it in a poller. Signed-off-by: Sascha Hauer --- drivers/gpio/gpiolib.c | 11 +++++++++++ include/gpio.h | 15 +++++++++++++++ 2 files changed, 26 insertions(+) diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index bcfdd5a0dd..5bc261a010 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -172,6 +172,16 @@ int gpio_request(unsigned gpio, const char *label) return gpiodesc_request(desc, label); } +bool gpio_slice_acquired(unsigned gpio) +{ + struct gpio_desc *desc = gpio_to_desc(gpio); + + if (!desc) + return false; + + return slice_acquired(&desc->chip->slice); +} + static void gpiodesc_free(struct gpio_desc *desc) { if (!desc->requested) @@ -1013,6 +1023,7 @@ int gpiochip_add(struct gpio_chip *chip) return -ENOSPC; } + slice_init(&chip->slice, dev_name(chip->dev)); list_add_tail(&chip->list, &chip_list); diff --git a/include/gpio.h b/include/gpio.h index 9951532084..adc1eb39ac 100644 --- a/include/gpio.h +++ b/include/gpio.h @@ -2,6 +2,7 @@ #ifndef __GPIO_H #define __GPIO_H +#include #include #include #include @@ -156,6 +157,12 @@ static inline int gpio_array_to_id(const struct gpio *array, size_t num, u32 *va { return -EINVAL; } + +static inline bool gpio_slice_acquired(unsigned gpio) +{ + return false; +} + #else int gpio_request(unsigned gpio, const char *label); int gpio_find_by_name(const char *name); @@ -165,6 +172,7 @@ int gpio_request_one(unsigned gpio, unsigned long flags, const char *label); int gpio_request_array(const struct gpio *array, size_t num); void gpio_free_array(const struct gpio *array, size_t num); int gpio_array_to_id(const struct gpio *array, size_t num, u32 *val); +bool gpio_slice_acquired(unsigned gpio); #endif struct gpio_chip; @@ -213,9 +221,16 @@ struct gpio_chip { struct gpio_ops *ops; + struct slice slice; + struct list_head list; }; +static inline struct slice *gpiochip_slice(struct gpio_chip *chip) +{ + return &chip->slice; +} + int gpiochip_add(struct gpio_chip *chip); void gpiochip_remove(struct gpio_chip *chip); -- 2.39.2