From patchwork Tue Oct 8 13:51:50 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ionut Nicu X-Patchwork-Id: 281477 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 0DCB32C00CD for ; Wed, 9 Oct 2013 00:52:03 +1100 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752682Ab3JHNv7 (ORCPT ); Tue, 8 Oct 2013 09:51:59 -0400 Received: from demumfd001.nsn-inter.net ([93.183.12.32]:10574 "EHLO demumfd001.nsn-inter.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751682Ab3JHNv6 (ORCPT ); Tue, 8 Oct 2013 09:51:58 -0400 Received: from demuprx016.emea.nsn-intra.net ([10.150.129.55]) by demumfd001.nsn-inter.net (8.12.11.20060308/8.12.11) with ESMTP id r98Dpqnv021272 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=FAIL); Tue, 8 Oct 2013 15:51:53 +0200 Received: from [10.151.38.113] ([10.151.38.113]) by demuprx016.emea.nsn-intra.net (8.12.11.20060308/8.12.11) with ESMTP id r98DppZa032305; Tue, 8 Oct 2013 15:51:51 +0200 Message-ID: <52540DF6.6050407@nsn.com> Date: Tue, 08 Oct 2013 15:51:50 +0200 From: Ionut Nicu User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20130801 Thunderbird/17.0.8 MIME-Version: 1.0 To: Peter Korsgaard CC: Wolfram Sang , Alexander Sverdlin , linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 1/2] i2c-mux-gpio: use deferred probing with the device tree X-purgate-type: clean X-purgate-Ad: Categorized by eleven eXpurgate (R) http://www.eleven.de X-purgate: clean X-purgate: This mail is considered clean (visit http://www.eleven.de for further information) X-purgate-size: 833 X-purgate-ID: 151667::1381240313-00004A43-BE37E5F7/0-0/0-0 Sender: linux-i2c-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org If the i2c-parent bus driver is not loaded, returning -EINVAL will force people to unload and then reload the module again to get it working. Signed-off-by: Ionut Nicu Acked-by: Peter Korsgaard --- drivers/i2c/muxes/i2c-mux-gpio.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/drivers/i2c/muxes/i2c-mux-gpio.c b/drivers/i2c/muxes/i2c-mux-gpio.c index 5d4a99b..eb99f04 100644 --- a/drivers/i2c/muxes/i2c-mux-gpio.c +++ b/drivers/i2c/muxes/i2c-mux-gpio.c @@ -79,7 +79,7 @@ static int i2c_mux_gpio_probe_dt(struct gpiomux *mux, adapter = of_find_i2c_adapter_by_node(adapter_np); if (!adapter) { dev_err(&pdev->dev, "Cannot find parent bus\n"); - return -ENODEV; + return -EPROBE_DEFER; } mux->data.parent = i2c_adapter_id(adapter); put_device(&adapter->dev);