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

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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: Saravana Kannan <saravanak@google.com>
Acked-by: "Rafael J. Wysocki" <rafael@kernel.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20240305050458.1400667-4-saravanak@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Saravana Kannan 2024-03-04 21:04:56 -08:00 committed by Greg Kroah-Hartman
parent b7e1241d8f
commit 135116f3d0
1 changed files with 12 additions and 3 deletions
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15
drivers/of/property.c
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@ -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);
}