device connection: Prepare support for firmware described connections (80e04837) · Commits · 戴 / test

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>

drivers/base/devcon.c

+24 −0

Original line number	Diff line number	Diff line
		@@ -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)

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