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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>
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1 changed files with 24 additions and 0 deletions
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@ -75,12 +75,36 @@ static struct bus_type *generic_match_buses[] = {
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NULL,
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};
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static int device_fwnode_match(struct device *dev, void *fwnode)
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{
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return dev_fwnode(dev) == fwnode;
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}
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static void *device_connection_fwnode_match(struct device_connection *con)
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{
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struct bus_type *bus;
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struct device *dev;
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for (bus = generic_match_buses[0]; bus; bus++) {
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dev = bus_find_device(bus, NULL, (void *)con->fwnode,
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device_fwnode_match);
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if (dev && !strncmp(dev_name(dev), con->id, strlen(con->id)))
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return dev;
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put_device(dev);
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}
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return NULL;
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}
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/* This tries to find the device from the most common bus types by name. */
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static void *generic_match(struct device_connection *con, int ep, void *data)
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{
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struct bus_type *bus;
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struct device *dev;
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if (con->fwnode)
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return device_connection_fwnode_match(con);
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for (bus = generic_match_buses[0]; bus; bus++) {
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dev = bus_find_device_by_name(bus, NULL, con->endpoint[ep]);
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if (dev)
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