From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 69B3AC432C0 for ; Wed, 27 Nov 2019 13:59:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 49CDA20722 for ; Wed, 27 Nov 2019 13:59:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726920AbfK0N7i (ORCPT ); Wed, 27 Nov 2019 08:59:38 -0500 Received: from metis.ext.pengutronix.de ([85.220.165.71]:57179 "EHLO metis.ext.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726655AbfK0N7i (ORCPT ); Wed, 27 Nov 2019 08:59:38 -0500 Received: from dude02.hi.pengutronix.de ([2001:67c:670:100:1d::28] helo=dude02.lab.pengutronix.de) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1iZxqv-0005PC-Jd; Wed, 27 Nov 2019 14:59:33 +0100 Received: from mfe by dude02.lab.pengutronix.de with local (Exim 4.92) (envelope-from ) id 1iZxqv-0008EN-3R; Wed, 27 Nov 2019 14:59:33 +0100 From: Marco Felsch To: bgolaszewski@baylibre.com, linus.walleij@linaro.org, support.opensource@diasemi.com, lee.jones@linaro.org, robh+dt@kernel.org, lgirdwood@gmail.com, broonie@kernel.org, stwiss.opensource@diasemi.com, Adam.Thomson.Opensource@diasemi.com Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, kernel@pengutronix.de Subject: [PATCH v2 1/5] gpio: add support to get local gpio number Date: Wed, 27 Nov 2019 14:59:28 +0100 Message-Id: <20191127135932.7223-2-m.felsch@pengutronix.de> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191127135932.7223-1-m.felsch@pengutronix.de> References: <20191127135932.7223-1-m.felsch@pengutronix.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 2001:67c:670:100:1d::28 X-SA-Exim-Mail-From: mfe@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: devicetree@vger.kernel.org Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Sometimes consumers needs to know the gpio-chip local gpio number of a 'struct gpio_desc' for further configuration. This is often the case for mfd devices. Signed-off-by: Marco Felsch --- drivers/gpio/gpiolib.c | 6 ++++++ include/linux/gpio/consumer.h | 10 ++++++++++ 2 files changed, 16 insertions(+) diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 104ed299d5ea..7709648313fc 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -4377,6 +4377,12 @@ int gpiod_count(struct device *dev, const char *con_id) } EXPORT_SYMBOL_GPL(gpiod_count); +int gpiod_to_offset(struct gpio_desc *desc) +{ + return gpio_chip_hwgpio(desc); +} +EXPORT_SYMBOL_GPL(gpiod_to_offset); + /** * gpiod_get - obtain a GPIO for a given GPIO function * @dev: GPIO consumer, can be NULL for system-global GPIOs diff --git a/include/linux/gpio/consumer.h b/include/linux/gpio/consumer.h index b70af921c614..e2178c3bf7fd 100644 --- a/include/linux/gpio/consumer.h +++ b/include/linux/gpio/consumer.h @@ -60,6 +60,9 @@ enum gpiod_flags { /* Return the number of GPIOs associated with a device / function */ int gpiod_count(struct device *dev, const char *con_id); +/* Get the local chip offset from a global desc */ +int gpiod_to_offset(struct gpio_desc *desc); + /* Acquire and dispose GPIOs */ struct gpio_desc *__must_check gpiod_get(struct device *dev, const char *con_id, @@ -189,6 +192,13 @@ static inline int gpiod_count(struct device *dev, const char *con_id) return 0; } +static inline int gpiod_to_offset(struct gpio_desc *desc) +{ + /* GPIO can never have been requested */ + WARN_ON(desc); + return 0; +} + static inline struct gpio_desc *__must_check gpiod_get(struct device *dev, const char *con_id, enum gpiod_flags flags) -- 2.20.1