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    Subject[PATCH v2 8/9] device connection: Prepare support for firmware described connections
    Date
    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.

    Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
    ---
    drivers/base/devcon.c | 24 ++++++++++++++++++++++++
    1 file changed, 24 insertions(+)

    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)
    --
    2.20.1
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