From patchwork Mon Jun 3 15:49:43 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: 165614 Delivered-To: patch@linaro.org Received: by 2002:a92:9e1a:0:0:0:0:0 with SMTP id q26csp4644327ili; Mon, 3 Jun 2019 08:51:34 -0700 (PDT) X-Google-Smtp-Source: APXvYqykbIQIAvJmPMkef00oWdAf3HuaL+BKUXSrKnOpzoeaZZa5GbRHjDUnO/Vl3kZ+ozU36y47 X-Received: by 2002:a17:902:7c10:: with SMTP id x16mr29509730pll.4.1559577094750; Mon, 03 Jun 2019 08:51:34 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1559577094; cv=none; d=google.com; s=arc-20160816; b=iRi5a9bFiEbbrSpdgLCg6skbFQtxE2VIOe0bj+y4RWTeBjLDkR7Q2ZmWEP5guS6mqe YXQy9pWKizuEUuag884tsLuVb5OVzpiwsWxHmCpg5iI/ccoetn7A0KhxsI4s9gBwTRUe RCCXH0AhhKPecKmaxNZw4QzABN0uaZlgIFL6tTFMIbdzUoDRSbJPRQjVvdPdXYxOnagG U/TuXVORuzlvAvi9akyldVF15pgsVGpIYHEX3IKNck4GVO0SIfJ4y8/Ml8mT6KP4eAMG goqzcn7atlzIQP4p1MkN5t8b3bwGXgYVSUXuSx85/URkMPBuw+y9OK82jB5ZXklO6L2f dq7Q== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:references:in-reply-to:message-id:date :subject:cc:to:from; bh=WRbgEXhJUtFpxmVmOqLtjjcIAWpmYnb03qgVxxDlgXE=; b=so2Y2lyfIVFgZgBH6RntLXqqNgUrwHkcVllxrjosiRAmcMjo4CQ7rqo77RvcrbGpyd VqROhS2GF073CM7eNdTbNFMa9ezPewGH1YJTnNzKm44PuKSiwfPa0hILWZAhnXNcA5j6 DfgnjkyVTYasykckCaSD9L+F7TChfriqg5zCtsqa/Ic7wlUCG7WLcM519jNV6xDqQ6xl rp4lTFvklvQOQiGLWzysVTMXGDLBKFoETgql5M/GlgtwaliciwVIYnATcTRFyfYul+pj sNK8SUVP6eBy79kzY+jd1Vh2e2MJ+CD3m4T+yzHBD0S6XjmEIUIcZqCYQ3uRKNXeSkNZ nKHQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id ch7si14962581plb.21.2019.06.03.08.51.34; Mon, 03 Jun 2019 08:51:34 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729202AbfFCPvd (ORCPT + 30 others); Mon, 3 Jun 2019 11:51:33 -0400 Received: from foss.arm.com ([217.140.101.70]:53698 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728994AbfFCPvY (ORCPT ); Mon, 3 Jun 2019 11:51:24 -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 EAB8E1715; Mon, 3 Jun 2019 08:51:23 -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 DB6D83F246; Mon, 3 Jun 2019 08:51:22 -0700 (PDT) From: Suzuki K Poulose To: linux-kernel@vger.kernel.org Cc: gregkh@linuxfoundation.org, rafael@kernel.org, suzuki.poulose@arm.com, Ulf Hansson Subject: [RFC PATCH 17/57] drivers: Add generic match by device type helper Date: Mon, 3 Jun 2019 16:49:43 +0100 Message-Id: <1559577023-558-18-git-send-email-suzuki.poulose@arm.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1559577023-558-1-git-send-email-suzuki.poulose@arm.com> References: <1559577023-558-1-git-send-email-suzuki.poulose@arm.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add a generic helper routine to match the device type of a given device. Cc: Greg Kroah-Hartman Cc: "Rafael J. Wysocki" Cc: Ulf Hansson Signed-off-by: Suzuki K Poulose --- drivers/base/core.c | 6 ++++++ include/linux/device.h | 15 +++++++++++++++ 2 files changed, 21 insertions(+) -- 2.7.4 diff --git a/drivers/base/core.c b/drivers/base/core.c index 141c4f8..9df812f 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -3340,3 +3340,9 @@ int device_match_fwnode(struct device *dev, void *fwnode) return dev_fwnode(dev) == fwnode; } EXPORT_SYMBOL_GPL(device_match_fwnode); + +int device_match_devt(struct device *dev, void *pdevt) +{ + return dev->devt == *(dev_t *)pdevt; +} +EXPORT_SYMBOL_GPL(device_match_devt); diff --git a/include/linux/device.h b/include/linux/device.h index 54be931..83c0745 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -165,6 +165,7 @@ void subsys_dev_iter_exit(struct subsys_dev_iter *iter); int device_match_of_node(struct device *dev, void *np); int device_match_fwnode(struct device *dev, void *fwnode); +int device_match_devt(struct device *dev, void *pdevt); int bus_for_each_dev(struct bus_type *bus, struct device *start, void *data, int (*fn)(struct device *dev, void *data)); @@ -203,6 +204,20 @@ static inline struct device *bus_find_device_by_fwnode(struct bus_type *bus, return bus_find_device(bus, start, fwnode, device_match_fwnode); } +/** + * bus_find_device_by_devt : device iterator for locating a particular device + * matching the device type. + * @bus: bus type + * @start: Device to begin with + * @devt: device type of the device to match. + */ +static inline struct device *bus_find_device_by_devt(struct bus_type *bus, + struct device *start, + dev_t devt) +{ + return bus_find_device(bus, start, &devt, device_match_devt); +} + struct device *subsys_find_device_by_id(struct bus_type *bus, unsigned int id, struct device *hint); int bus_for_each_drv(struct bus_type *bus, struct device_driver *start,