From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752143Ab3LLH6X (ORCPT ); Thu, 12 Dec 2013 02:58:23 -0500 Received: from hqemgate15.nvidia.com ([216.228.121.64]:15463 "EHLO hqemgate15.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751402Ab3LLH6S (ORCPT ); Thu, 12 Dec 2013 02:58:18 -0500 X-PGP-Universal: processed; by hqnvupgp07.nvidia.com on Thu, 12 Dec 2013 00:00:57 -0800 From: Hiroshi Doyu To: Stephen Warren , , , , , , , CC: Hiroshi Doyu , , , , , , , , Subject: [PATCHv7 04/12] driver/core: populate devices in order for IOMMUs Date: Thu, 12 Dec 2013 09:57:05 +0200 Message-ID: <1386835033-4701-5-git-send-email-hdoyu@nvidia.com> X-Mailer: git-send-email 1.8.1.5 In-Reply-To: <1386835033-4701-1-git-send-email-hdoyu@nvidia.com> References: <1386835033-4701-1-git-send-email-hdoyu@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org IOMMU devices on the bus need to be poplulated first, then iommu master devices are done later. With CONFIG_OF_IOMMU, "iommus=" DT binding would be used to identify whether a device can be an iommu msater or not. If a device can, we'll defer to populate that device till an iommu device is populated. Then, those deferred iommu master devices are populated and configured with help of the already populated iommu device. Signed-off-by: Hiroshi Doyu Cc: Greg Kroah-Hartman --- This is related to the following discussion: [RFC PATCH] Documentation: devicetree: add description for generic bus properties http://lists.infradead.org/pipermail/linux-arm-kernel/2013-November/215042.html v6: Spinned off only driver core part from: [PATCHv5 2/9] driver/core: populate devices in order for IOMMUs v5: Use "iommus=" binding instread of arm,smmu's "#stream-id-cells". v4: This is newly added, and the successor of the following RFC: [RFC][PATCHv3+ 1/2] driver/core: Add of_iommu_attach() http://lists.linuxfoundation.org/pipermail/iommu/2013-November/006914.html Signed-off-by: Hiroshi Doyu --- drivers/base/dd.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/base/dd.c b/drivers/base/dd.c index 0605176..0605f52 100644 --- a/drivers/base/dd.c +++ b/drivers/base/dd.c @@ -25,6 +25,7 @@ #include #include #include +#include #include "base.h" #include "power/power.h" @@ -273,6 +274,10 @@ static int really_probe(struct device *dev, struct device_driver *drv) dev->driver = drv; + ret = of_iommu_attach(dev); + if (ret) + goto probe_failed; + /* If using pinctrl, bind pins now before probing */ ret = pinctrl_bind_pins(dev); if (ret) -- 1.8.1.5