Commit 135116f3 authored by Saravana Kannan's avatar Saravana Kannan Committed by Greg Kroah-Hartman
Browse files

of: property: fw_devlink: Add support for "post-init-providers" property 



Add support for this property so that dependency cycles can be broken and
fw_devlink can do better probe/suspend/resume ordering between devices in a
dependency cycle.

Signed-off-by: default avatarSaravana Kannan <saravanak@google.com>
Acked-by: default avatar"Rafael J. Wysocki" <rafael@kernel.org>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20240305050458.1400667-4-saravanak@google.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent b7e1241d

drivers/of/property.c

+12 −3
Original line number Diff line number Diff line
@@ -1066,7 +1066,8 @@ of_fwnode_device_get_match_data(const struct fwnode_handle *fwnode, 
}



static void of_link_to_phandle(struct device_node *con_np,

			      struct device_node *sup_np)

			      struct device_node *sup_np,

			      u8 flags)

{

	struct device_node *tmp_np = of_node_get(sup_np);
@@ -1085,7 +1086,7 @@ static void of_link_to_phandle(struct device_node *con_np, 
		tmp_np = of_get_next_parent(tmp_np);

	}



	fwnode_link_add(of_fwnode_handle(con_np), of_fwnode_handle(sup_np), 0);

	fwnode_link_add(of_fwnode_handle(con_np), of_fwnode_handle(sup_np), flags);

}



/**
@@ -1198,6 +1199,8 @@ static struct device_node *parse_##fname(struct device_node *np, \ 
 *		 to a struct device, implement this ops so fw_devlink can use it

 *		 to find the true consumer.

 * @optional: Describes whether a supplier is mandatory or not

 * @fwlink_flags: Optional fwnode link flags to use when creating a fwnode link

 *		  for this property.

 *

 * Returns:

 * parse_prop() return values are
@@ -1210,6 +1213,7 @@ struct supplier_bindings { 
					  const char *prop_name, int index);

	struct device_node *(*get_con_dev)(struct device_node *np);

	bool optional;

	u8 fwlink_flags;

};



DEFINE_SIMPLE_PROP(clocks, "clocks", "#clock-cells")
@@ -1240,6 +1244,7 @@ DEFINE_SIMPLE_PROP(leds, "leds", NULL) 
DEFINE_SIMPLE_PROP(backlight, "backlight", NULL)

DEFINE_SIMPLE_PROP(panel, "panel", NULL)

DEFINE_SIMPLE_PROP(msi_parent, "msi-parent", "#msi-cells")

DEFINE_SIMPLE_PROP(post_init_providers, "post-init-providers", NULL)

DEFINE_SUFFIX_PROP(regulators, "-supply", NULL)

DEFINE_SUFFIX_PROP(gpio, "-gpio", "#gpio-cells")
@@ -1349,6 +1354,10 @@ static const struct supplier_bindings of_supplier_bindings[] = { 
	{ .parse_prop = parse_regulators, },

	{ .parse_prop = parse_gpio, },

	{ .parse_prop = parse_gpios, },

	{

		.parse_prop = parse_post_init_providers,

		.fwlink_flags = FWLINK_FLAG_IGNORE,

	},

	{}

};
@@ -1393,7 +1402,7 @@ static int of_link_property(struct device_node *con_np, const char *prop_name) 
					: of_node_get(con_np);

			matched = true;

			i++;

			of_link_to_phandle(con_dev_np, phandle);

			of_link_to_phandle(con_dev_np, phandle, s->fwlink_flags);

			of_node_put(phandle);

			of_node_put(con_dev_np);

		}