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| author |   Saravana Kannan <saravanak@google.com> | 2019-09-04 14:11:20 -0700 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-10-04 17:29:50 +0200 |
| commit | 372a67c0c5ef63f55bd1eb480d9555328d8ec0f2 (patch) | |
| tree | 1ff641b62d62fba319f596f65cf1c614b4e1b815 | |
| parent | Linux 5.4-rc1 (diff) | |
| download | linux-dev-372a67c0c5ef63f55bd1eb480d9555328d8ec0f2.tar.xz linux-dev-372a67c0c5ef63f55bd1eb480d9555328d8ec0f2.zip | |
driver core: Add fwnode_to_dev() to look up device from fwnode
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 <saravanak@google.com>
Link: https://lore.kernel.org/r/20190904211126.47518-2-saravanak@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/base/core.c | 7 | ||||
| -rw-r--r-- | include/linux/fwnode.h | 2 |
2 files changed, 9 insertions, 0 deletions
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 |