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gpio: shared: ignore special __symbols__ node when traversing device tree

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The __symbols__ node is a special, internal node and its properties must
not be considered when scanning the device-tree for shared GPIOs.

Fixes: a060b8c511 ("gpiolib: implement low-level, shared GPIO support")
Reported-by: Jon Hunter <jonathanh@nvidia.com>
Closes: https://lore.kernel.org/all/0829a21c-f97d-41b6-90bc-2acaec42caab@nvidia.com/
Tested-by: Jon Hunter <jonathanh@nvidia.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Link: https://lore.kernel.org/r/20251126-gpio-shared-fixes-v1-1-18309c0e87b5@linaro.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
This commit is contained in:
Bartosz Golaszewski
2025-11-26 17:49:05 +01:00
parent 7b78b26757
commit cfab6dc070
1 changed files with 16 additions and 0 deletions
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16
drivers/gpio/gpiolib-shared.c
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@@ -73,6 +73,19 @@ gpio_shared_find_entry(struct fwnode_handle *controller_node,
return NULL;
}
/* Handle all special nodes that we should ignore. */
static bool gpio_shared_of_node_ignore(struct device_node *node)
{
/*
* __symbols__ is a special, internal node and should not be considered
* when scanning for shared GPIOs.
*/
if (of_node_name_eq(node, "__symbols__"))
return true;
return false;
}
static int gpio_shared_of_traverse(struct device_node *curr)
{
struct gpio_shared_entry *entry;
@@ -84,6 +97,9 @@ static int gpio_shared_of_traverse(struct device_node *curr)
const char *suffix;
int ret, count, i;
if (gpio_shared_of_node_ignore(curr))
return 0;
for_each_property_of_node(curr, prop) {
/*
* The standard name for a GPIO property is "foo-gpios"