From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753772Ab3LCMfD (ORCPT ); Tue, 3 Dec 2013 07:35:03 -0500 Received: from mail-we0-f171.google.com ([74.125.82.171]:36741 "EHLO mail-we0-f171.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753585Ab3LCMe6 (ORCPT ); Tue, 3 Dec 2013 07:34:58 -0500 Date: Tue, 3 Dec 2013 12:34:54 +0000 From: Kim Phillips To: linux-kernel@vger.kernel.org, Greg Kroah-Hartman Cc: kvm@vger.kernel.org, scottwood@freescale.com, R65777@freescale.com, B07421@freescale.com, B08248@freescale.com, christoffer.dall@linaro.org, alex.williamson@redhat.com, a.motakis@virtualopensystems.com, agraf@suse.de, B16395@freescale.com Subject: [REPOST][PATCH 2/2] driver core: platform: allow platform drivers to bind to any device Message-Id: <20131203123454.3ab18749ed0d0d943b10df9a@linaro.org> X-Mailer: Sylpheed 3.4.0beta5 (GTK+ 2.24.20; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Platform drivers such as the vfio-platform "meta-" driver [1] should be allowed to specify that they can bind to any device, much like PCI drivers can with PCI_ANY_ID. Currently, binding platform drivers to devices depends on: - a string match in the device node's compatible entry (OF) - a string match in the ACPI id list (ACPI) - a string match in the id_table (platform data) - a string match on the driver name (fall-back) none of which allow for the notion of "match any." This patch adds the notion by adding a "match any device" boolean to struct platform_driver, for drivers to be able to set and thus not cause platform_match() to fail when a bind is requested. [1] http://www.spinics.net/lists/kvm/msg96701.html Signed-off-by: Kim Phillips --- rebased onto 3.13-rc2, and reposted from first submission which received no comments: https://lkml.org/lkml/2013/10/11/48 drivers/base/platform.c | 4 ++++ include/linux/platform_device.h | 1 + 2 files changed, 5 insertions(+) diff --git a/drivers/base/platform.c b/drivers/base/platform.c index 3a94b79..78a5b62 100644 --- a/drivers/base/platform.c +++ b/drivers/base/platform.c @@ -736,6 +736,10 @@ static int platform_match(struct device *dev, struct device_driver *drv) struct platform_device *pdev = to_platform_device(dev); struct platform_driver *pdrv = to_platform_driver(drv); + /* the driver matches any device */ + if (pdrv->match_any_dev) + return 1; + /* Attempt an OF style match first */ if (of_driver_match_device(dev, drv)) return 1; diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h index 16f6654..55e76b1 100644 --- a/include/linux/platform_device.h +++ b/include/linux/platform_device.h @@ -179,6 +179,7 @@ struct platform_driver { struct device_driver driver; const struct platform_device_id *id_table; bool prevent_deferred_probe; + bool match_any_dev; }; #define to_platform_driver(drv) (container_of((drv), struct platform_driver, \ -- 1.8.5