From patchwork Wed Jun 5 15:13:47 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Suzuki K Poulose X-Patchwork-Id: 10977197 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 46AEE13AD for ; Wed, 5 Jun 2019 15:15:17 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 37E9E27FA5 for ; Wed, 5 Jun 2019 15:15:17 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 359C828742; Wed, 5 Jun 2019 15:15:17 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 99AB228899 for ; Wed, 5 Jun 2019 15:15:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728248AbfFEPOx (ORCPT ); Wed, 5 Jun 2019 11:14:53 -0400 Received: from foss.arm.com ([217.140.101.70]:33540 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728582AbfFEPOw (ORCPT ); Wed, 5 Jun 2019 11:14:52 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 71BF615A2; Wed, 5 Jun 2019 08:14:52 -0700 (PDT) Received: from en101.cambridge.arm.com (en101.cambridge.arm.com [10.1.196.93]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 91E053F246; Wed, 5 Jun 2019 08:14:47 -0700 (PDT) From: Suzuki K Poulose To: linux-kernel@vger.kernel.org Cc: gregkh@linuxfoundation.org, rafael@kernel.org, suzuki.poulose@arm.com, Alessandro Zummo , Alexander Aring , Alexander Shishkin , Alexandre Belloni , Andrew Lunn , Arnd Bergmann , Dan Murphy , "David S. Miller" , Florian Fainelli , Harald Freudenberger , Heikki Krogerus , Heiko Carstens , Heiner Kallweit , Jacek Anaszewski , Jiri Slaby , Liam Girdwood , linux-leds@vger.kernel.org, linux-rtc@vger.kernel.org, linux-usb@vger.kernel.org, linux-wpan@vger.kernel.org, Mark Brown , Maxime Coquelin , Pavel Machek , Peter Rosin , Stefan Schmidt , Tomas Winkler , "Rafael J. Wysocki" Subject: [PATCH 10/13] drivers: Introduce variants of class_find_device() Date: Wed, 5 Jun 2019 16:13:47 +0100 Message-Id: <1559747630-28065-11-git-send-email-suzuki.poulose@arm.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1559747630-28065-1-git-send-email-suzuki.poulose@arm.com> References: <1559747630-28065-1-git-send-email-suzuki.poulose@arm.com> Sender: linux-wpan-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wpan@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Now that we have generic helpers to match various generic device attributes, provide wrappers to the class_find_device() to lookup devices by individual properties. The new wrappers except the lookup by devt, drops the "start" device pointer as none of the existing users need it and the attributes are usually unique. The idea is to stop the proliferation of custom match functions to do generic attribute matching. So now we have : class_find_device_by_name class_find_device_by_of_node class_find_device_by_fwnode class_find_device_by_devt Cc: Alessandro Zummo Cc: Alexander Aring Cc: Alexander Shishkin Cc: Alexandre Belloni Cc: Andrew Lunn Cc: Arnd Bergmann Cc: Dan Murphy Cc: "David S. Miller" Cc: Florian Fainelli Cc: Greg Kroah-Hartman Cc: Harald Freudenberger Cc: Heikki Krogerus Cc: Heiko Carstens Cc: Heiner Kallweit Cc: Jacek Anaszewski Cc: Jiri Slaby Cc: Liam Girdwood Cc: linux-leds@vger.kernel.org Cc: linux-rtc@vger.kernel.org Cc: linux-usb@vger.kernel.org Cc: linux-wpan@vger.kernel.org Cc: Mark Brown Cc: Maxime Coquelin Cc: Pavel Machek Cc: Peter Rosin Cc: Stefan Schmidt Cc: Tomas Winkler Cc: Greg Kroah-Hartman Cc: "Rafael J. Wysocki" Signed-off-by: Suzuki K Poulose --- include/linux/device.h | 51 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) diff --git a/include/linux/device.h b/include/linux/device.h index 8c8727b..4396edc 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -474,6 +474,57 @@ extern struct device *class_find_device(struct class *class, struct device *start, const void *data, int (*match)(struct device *, const void *)); +/** + * class_find_device_by_name - device iterator for locating a particular device + * of a specific name. + * @class: class type + * @name: name of the device to match + */ +static inline struct device *class_find_device_by_name(struct class *class, + const char *name) +{ + return class_find_device(class, NULL, name, device_match_name); +} + +/** + * class_find_device_by_of_node : device iterator for locating a particular device + * matching the of_node. + * @class: class type + * @np: of_node of the device to match. + */ +static inline struct device * +class_find_device_by_of_node(struct class *class, const struct device_node *np) +{ + return class_find_device(class, NULL, np, device_match_of_node); +} + +/** + * class_find_device_by_fwnode : device iterator for locating a particular device + * matching the fwnode. + * @class: class type + * @fwnode: fwnode of the device to match. + */ +static inline struct device * +class_find_device_by_fwnode(struct class *class, + const struct fwnode_handle *fwnode) +{ + return class_find_device(class, NULL, fwnode, device_match_fwnode); +} + +/** + * class_find_device_by_devt : device iterator for locating a particular device + * matching the device type. + * @class: class type + * @start: device to start search from + * @devt: device type of the device to match. + */ +static inline struct device *class_find_device_by_devt(struct class *class, + struct device *start, + dev_t devt) +{ + return class_find_device(class, start, &devt, device_match_devt); +} + struct class_attribute { struct attribute attr; ssize_t (*show)(struct class *class, struct class_attribute *attr,