From patchwork Thu Jul 30 16:18:52 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Javier Martinez Canillas X-Patchwork-Id: 6903961 Return-Path: X-Original-To: patchwork-linux-pm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id AB0BB9F358 for ; Thu, 30 Jul 2015 16:20:54 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id C5C7A20515 for ; Thu, 30 Jul 2015 16:20:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5EF8C205DD for ; Thu, 30 Jul 2015 16:20:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753874AbbG3QUg (ORCPT ); Thu, 30 Jul 2015 12:20:36 -0400 Received: from lists.s-osg.org ([54.187.51.154]:55147 "EHLO lists.s-osg.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753787AbbG3QUa (ORCPT ); Thu, 30 Jul 2015 12:20:30 -0400 Received: from localhost.localdomain (119.3.11.37.dynamic.jazztel.es [37.11.3.119]) by lists.s-osg.org (Postfix) with ESMTPSA id 1A92C46328; Thu, 30 Jul 2015 09:20:20 -0700 (PDT) From: Javier Martinez Canillas To: linux-kernel@vger.kernel.org Cc: Javier Martinez Canillas , alsa-devel@alsa-project.org, Mark Brown , linux-iio@vger.kernel.org, linux-fbdev@vger.kernel.org, linux-i2c@vger.kernel.org, linux-leds@vger.kernel.org, Sebastian Reichel , Chanwoo Choi , Tomi Valkeinen , lm-sensors@lm-sensors.org, Alexandre Belloni , linux-input@vger.kernel.org, Greg Kroah-Hartman , Jean Delvare , Jonathan Cameron , linux-media@vger.kernel.org, rtc-linux@googlegroups.com, linux-pm@vger.kernel.org, Mauro Carvalho Chehab , Guenter Roeck , Benjamin Herrenschmidt , Wolfram Sang , Takashi Iwai , Liam Girdwood , Sjoerd Simons , Lee Jones , Bryan Wu , linux-omap@vger.kernel.org, Sakari Ailus , linux-usb@vger.kernel.org, linux-spi@vger.kernel.org, Dmitry Torokhov , Tony Lindgren , MyungJoo Ham , linuxppc-dev@lists.ozlabs.org Subject: [PATCH 27/27] i2c: (RFC, don't apply) report OF style modalias when probing using DT Date: Thu, 30 Jul 2015 18:18:52 +0200 Message-Id: <1438273132-20926-28-git-send-email-javier@osg.samsung.com> X-Mailer: git-send-email 2.4.3 In-Reply-To: <1438273132-20926-1-git-send-email-javier@osg.samsung.com> References: <1438273132-20926-1-git-send-email-javier@osg.samsung.com> Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Spam-Status: No, score=-8.3 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP An I2C driver that supports both OF and legacy platforms, will have both a OF and I2C ID table. This means that when built as a module, the aliases will be filled from both tables but currently always an alias of the form i2c: is reported, e.g: $ cat /sys/class/i2c-adapter/i2c-8/8-004b/modalias i2c:maxtouch So if a device is probed by matching its compatible string, udev can get a MODALIAS uevent env var that doesn't match with one of the valid aliases so the module won't be auto-loaded. This patch changes the I2C core to report a OF related MODALIAS uevent (of:N*T*C) env var instead so the module can be auto-loaded and also report the correct alias using sysfs: $ cat /sys/class/i2c-adapter/i2c-8/8-004b/modalias of:NtrackpadTCatmel,maxtouch Signed-off-by: Javier Martinez Canillas --- drivers/i2c/i2c-core.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c index 92dddfeb3f39..c0668c2ed9da 100644 --- a/drivers/i2c/i2c-core.c +++ b/drivers/i2c/i2c-core.c @@ -489,6 +489,10 @@ static int i2c_device_uevent(struct device *dev, struct kobj_uevent_env *env) struct i2c_client *client = to_i2c_client(dev); int rc; + rc = of_device_uevent_modalias(dev, env); + if (rc != -ENODEV) + return rc; + rc = acpi_device_uevent_modalias(dev, env); if (rc != -ENODEV) return rc; @@ -726,6 +730,10 @@ show_modalias(struct device *dev, struct device_attribute *attr, char *buf) struct i2c_client *client = to_i2c_client(dev); int len; + len = of_device_get_modalias(dev, buf, PAGE_SIZE - 1); + if (len != -ENODEV) + return len; + len = acpi_device_modalias(dev, buf, PAGE_SIZE -1); if (len != -ENODEV) return len;