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of: property: fw_devlink: Fixup behaviour when 'node_not_dev' is set 

In the struct supplier_bindings the member 'node_not_dev' is described as
"The consumer node containing the property is never a device.", but that is
inconsistent with the behaviour of the code in of_link_property(), as it
calls of_get_compat_node() that starts parsing for a compatible property
from the node it gets passed to it. The proper behaviour is to start at the
node's parent, so let's do that.

While at it, let's take the opportunity to update the description of the
'node_not_dev' flag, as to clarify its purpose.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Saravana Kannan <saravanak@google.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210902090221.820254-1-ulf.hansson@linaro.org
This commit is contained in:
Ulf Hansson 2021-09-02 11:02:21 +02:00 committed by Rob Herring
parent 5ebea8244a
commit 3cd6bab2f8
1 changed files with 15 additions and 2 deletions
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17
drivers/of/property.c
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@ -1075,6 +1075,17 @@ static struct device_node *of_get_compat_node(struct device_node *np)
return np;
}
static struct device_node *of_get_compat_node_parent(struct device_node *np)
{
struct device_node *parent, *node;
parent = of_get_parent(np);
node = of_get_compat_node(parent);
of_node_put(parent);
return node;
}
/**
* of_link_to_phandle - Add fwnode link to supplier from supplier phandle
* @con_np: consumer device tree node
@ -1249,7 +1260,9 @@ static struct device_node *parse_##fname(struct device_node *np, \
* @parse_prop.index: For properties holding a list of phandles, this is the
* index into the list
* @optional: Describes whether a supplier is mandatory or not
* @node_not_dev: The consumer node containing the property is never a device.
* @node_not_dev: The consumer node containing the property is never converted
* to a struct device. Instead, parse ancestor nodes for the
* compatible property to find a node corresponding to a device.
*
* Returns:
* parse_prop() return values are
@ -1424,7 +1437,7 @@ static int of_link_property(struct device_node *con_np, const char *prop_name)
struct device_node *con_dev_np;
con_dev_np = s->node_not_dev
? of_get_compat_node(con_np)
? of_get_compat_node_parent(con_np)
: of_node_get(con_np);
matched = true;
i++;