diff options
| author |   Heikki Krogerus <heikki.krogerus@linux.intel.com> | 2019-02-13 10:45:56 +0300 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-02-14 10:52:25 +0100 |
| commit | 80e04837a40f6f1c8e93437be3f772c967a41d2f (patch) | |
| tree | d5307091273f36e9ba62182dd5b8e5f58a37765b /drivers/base | |
| parent | platform/x86: intel_cht_int33fe: Remove old style mux connections (diff) | |
| download | linux-dev-80e04837a40f6f1c8e93437be3f772c967a41d2f.tar.xz linux-dev-80e04837a40f6f1c8e93437be3f772c967a41d2f.zip | |
device connection: Prepare support for firmware described connections
When the connections are defined in firmware, struct
device_connection will have the fwnode member pointing to
the device node (struct fwnode_handle) of the requested
device. The endpoint member for the device names will not be
used at all in that case.
Acked-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Jun Li <jun.li@nxp.com>
Tested-by: Jun Li <jun.li@nxp.com>
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/devcon.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/base/devcon.c b/drivers/base/devcon.c index d427e806cd73..858b8d2f6ef8 100644 --- a/drivers/base/devcon.c +++ b/drivers/base/devcon.c @@ -75,12 +75,36 @@ static struct bus_type *generic_match_buses[] = { NULL, }; +static int device_fwnode_match(struct device *dev, void *fwnode) +{ + return dev_fwnode(dev) == fwnode; +} + +static void *device_connection_fwnode_match(struct device_connection *con) +{ + struct bus_type *bus; + struct device *dev; + + for (bus = generic_match_buses[0]; bus; bus++) { + dev = bus_find_device(bus, NULL, (void *)con->fwnode, + device_fwnode_match); + if (dev && !strncmp(dev_name(dev), con->id, strlen(con->id))) + return dev; + + put_device(dev); + } + return NULL; +} + /* This tries to find the device from the most common bus types by name. */ static void *generic_match(struct device_connection *con, int ep, void *data) { struct bus_type *bus; struct device *dev; + if (con->fwnode) + return device_connection_fwnode_match(con); + for (bus = generic_match_buses[0]; bus; bus++) { dev = bus_find_device_by_name(bus, NULL, con->endpoint[ep]); if (dev) |