linux-stable.git/drivers/base/property.c, branch v5.12.2

media: device property: Call fwnode_graph_get_endpoint_by_id() for fwnode->secondary

2021-01-26T18:24:18+00:00

This function is used to find fwnode endpoints against a device. In
some instances those endpoints are software nodes which are children of
fwnode->secondary. Add support to fwnode_graph_get_endpoint_by_id() to
find those endpoints by recursively calling itself passing the ptr to
fwnode->secondary in the event no endpoint is found for the primary.

Reviewed-by: Andy Shevchenko 
Reviewed-by: Laurent Pinchart 
Signed-off-by: Daniel Scally 
Acked-by: Greg Kroah-Hartman 
Acked-by: Rafael J. Wysocki 
Signed-off-by: Sakari Ailus 
Signed-off-by: Mauro Carvalho Chehab

media: device property: Return true in fwnode_device_is_available for NULL ops

2021-01-26T18:21:34+00:00

Some types of fwnode_handle do not implement the device_is_available()
check, such as those created by software_nodes. There isn't really a
meaningful way to check for the availability of a device that doesn't
actually exist, so if the check isn't implemented just assume that the
"device" is present.

Suggested-by: Laurent Pinchart 
Reviewed-by: Laurent Pinchart 
Reviewed-by: Andy Shevchenko 
Signed-off-by: Daniel Scally 
Reviewed-by: Heikki Krogerus 
Acked-by: Greg Kroah-Hartman 
Acked-by: Rafael J. Wysocki 
Signed-off-by: Sakari Ailus 
Signed-off-by: Mauro Carvalho Chehab

device property: Add fwnode_is_ancestor_of() and fwnode_get_next_parent_dev()

2020-12-09T18:10:21+00:00

Add fwnode_is_ancestor_of() helper function to check if a fwnode is an
ancestor of another fwnode.

Add fwnode_get_next_parent_dev() helper function that take as input a
fwnode and finds the closest ancestor fwnode that has a corresponding
struct device and returns that struct device.

Signed-off-by: Saravana Kannan 
Link: https://lore.kernel.org/r/20201121020232.908850-11-saravanak@google.com
Signed-off-by: Greg Kroah-Hartman

device property: Move fwnode_connection_find_match() under drivers/base/property.c

2020-09-08T11:32:06+00:00

The function is now only a helper that searches the
connection from device graph and then by checking if the
supplied connection identifier matches a property that
contains reference.

Signed-off-by: Heikki Krogerus 
Link: https://lore.kernel.org/r/20200907120532.37611-2-heikki.krogerus@linux.intel.com
Signed-off-by: Greg Kroah-Hartman

device property: Avoid NULL pointer dereference in device_get_next_child_node()

2020-07-23T15:04:28+00:00

When we have no primary fwnode or when it's a software node, we may end up
in the situation when fwnode is a NULL pointer. There is no point to look for
secondary fwnode in such case. Add a necessary check to a condition.

Fixes: 114dbb4fa7c4 ("drivers property: When no children in primary, try secondary")
Reported-by: Maxim Levitsky 
Signed-off-by: Andy Shevchenko 
Tested-by: Maxim Levitsky 
Link: https://lore.kernel.org/r/20200716182747.54929-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman

drivers property: When no children in primary, try secondary

2020-05-21T09:03:47+00:00

Software firmware nodes can provide a child node to its parent.
Since software node can be secondary, we need a mechanism to access
the children. The idea is to list children of the primary node first
and when they are finished, continue with secondary node if available.

Signed-off-by: Andy Shevchenko 
Reviewed-by: Rafael J. Wysocki 
Acked-by: Sakari Ailus 
Reviewed-by: Heikki Krogerus 
Link: https://lore.kernel.org/r/20200520102959.34812-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman

device property: Export fwnode_get_name()

2020-03-16T06:47:58+00:00

This makes it possible to take advantage of the function in
the device drivers.

Signed-off-by: Heikki Krogerus 
Acked-by: Rafael J. Wysocki 
Link: https://lore.kernel.org/r/20200302135353.56659-8-heikki.krogerus@linux.intel.com
Signed-off-by: Greg Kroah-Hartman

device property: Add a function to obtain a node's prefix

2019-10-11T09:26:55+00:00

The prefix is used for printing purpose before a node, and it also works
as a separator between two nodes.

Signed-off-by: Sakari Ailus 
Acked-by: Rob Herring  (for OF)
Reviewed-by: Andy Shevchenko 
Signed-off-by: Rafael J. Wysocki

device property: Add fwnode_get_name for returning the name of a node

2019-10-11T09:26:55+00:00

The fwnode framework did not have means to obtain the name of a node. Add
that now, in form of the fwnode_get_name() function and a corresponding
get_name fwnode op. OF and ACPI support is included.

Signed-off-by: Sakari Ailus 
Acked-by: Rob Herring  (for OF)
Reviewed-by: Andy Shevchenko 
Signed-off-by: Rafael J. Wysocki

device property: Add functions for accessing node's parents

2019-10-11T09:26:55+00:00

Add two convenience functions for accessing node's parents:

fwnode_count_parents() returns the number of parent nodes a given node
has. fwnode_get_nth_parent() returns node's parent at a given distance
from the node itself.

Signed-off-by: Sakari Ailus 
Reviewed-by: Andy Shevchenko 
Signed-off-by: Rafael J. Wysocki