From mboxrd@z Thu Jan 1 00:00:00 1970 From: Saravana Kannan Subject: [PATCH v11 1/6] driver core: Add fwnode_to_dev() to look up device from fwnode Date: Wed, 4 Sep 2019 14:11:20 -0700 Message-ID: <20190904211126.47518-2-saravanak@google.com> References: <20190904211126.47518-1-saravanak@google.com> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Return-path: In-Reply-To: <20190904211126.47518-1-saravanak@google.com> Sender: linux-kernel-owner@vger.kernel.org To: Rob Herring , Mark Rutland , Greg Kroah-Hartman , "Rafael J. Wysocki" , Frank Rowand , Jonathan Corbet , Len Brown Cc: Saravana Kannan , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-acpi@vger.kernel.org, clang-built-linux@googlegroups.com, David Collins , kernel-team@android.com List-Id: devicetree@vger.kernel.org It's often useful to look up a device that corresponds to a fwnode. So add an API to do that irrespective of the bus on which the device has been added to. Signed-off-by: Saravana Kannan --- drivers/base/core.c | 7 +++++++ include/linux/fwnode.h | 2 ++ 2 files changed, 9 insertions(+) diff --git a/drivers/base/core.c b/drivers/base/core.c index 2db62d98e395..510fabf8918c 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -2198,6 +2198,10 @@ int device_add(struct device *dev) BUS_NOTIFY_ADD_DEVICE, dev); kobject_uevent(&dev->kobj, KOBJ_ADD); + + if (dev->fwnode && !dev->fwnode->dev) + dev->fwnode->dev = dev; + bus_probe_device(dev); if (parent) klist_add_tail(&dev->p->knode_parent, @@ -2342,6 +2346,9 @@ void device_del(struct device *dev) kill_device(dev); device_unlock(dev); + if (dev->fwnode && dev->fwnode->dev == dev) + dev->fwnode->dev = NULL; + /* Notify clients of device removal. This call must come * before dpm_sysfs_remove(). */ diff --git a/include/linux/fwnode.h b/include/linux/fwnode.h index ababd6bc82f3..d8c6d231d577 100644 --- a/include/linux/fwnode.h +++ b/include/linux/fwnode.h @@ -17,6 +17,7 @@ struct device; struct fwnode_handle { struct fwnode_handle *secondary; const struct fwnode_operations *ops; + struct device *dev; }; /** @@ -123,5 +124,6 @@ struct fwnode_operations { if (fwnode_has_op(fwnode, op)) \ (fwnode)->ops->op(fwnode, ## __VA_ARGS__); \ } while (false) +#define get_dev_from_fwnode(fwnode) get_device((fwnode)->dev) #endif -- 2.23.0.187.g17f5b7556c-goog