From: Saravana Kannan <saravanak@google.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"Rafael J. Wysocki" <rafael@kernel.org>,
Ard Biesheuvel <ardb@kernel.org>,
Rob Herring <robh+dt@kernel.org>,
Frank Rowand <frowand.list@gmail.com>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Daniel Scally <djrscally@gmail.com>,
Heikki Krogerus <heikki.krogerus@linux.intel.com>,
Sakari Ailus <sakari.ailus@linux.intel.com>,
Len Brown <lenb@kernel.org>
Cc: Saravana Kannan <saravanak@google.com>,
kernel-team@android.com, linux-kernel@vger.kernel.org,
linux-efi@vger.kernel.org, devicetree@vger.kernel.org,
linux-acpi@vger.kernel.org, Rob Herring <robh@kernel.org>
Subject: [PATCH v5 3/3] of: property: fw_devlink: Add support for "post-init-providers" property
Date: Mon, 4 Mar 2024 21:04:56 -0800 [thread overview]
Message-ID: <20240305050458.1400667-4-saravanak@google.com> (raw)
In-Reply-To: <20240305050458.1400667-1-saravanak@google.com>
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>
---
drivers/of/property.c | 15 ++++++++++++---
1 file changed, 12 insertions(+), 3 deletions(-)
diff --git a/drivers/of/property.c b/drivers/of/property.c
index bce849f21ae2..b517a92dabca 100644
--- a/drivers/of/property.c
+++ b/drivers/of/property.c
@@ -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);
}
--
2.44.0.278.ge034bb2e1d-goog
prev parent reply other threads:[~2024-03-05 5:05 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-05 5:04 [PATCH v5 0/3] Add post-init-providers binding to improve suspend/resume stability Saravana Kannan
2024-03-05 5:04 ` [PATCH v5 1/3] driver core: Adds flags param to fwnode_link_add() Saravana Kannan
2024-03-05 5:04 ` [PATCH v5 2/3] driver core: Add FWLINK_FLAG_IGNORE to completely ignore a fwnode link Saravana Kannan
2024-03-05 5:04 ` Saravana Kannan [this message]
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