mirrors/linux
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2025-12-27 11:06:41 -05:00
Code Issues Packages Projects Releases Wiki Activity

gpio: shared: ignore GPIO hogs when traversing the device tree

Browse Source 
GPIO hogs have a "gpios" property but it's not a phandle to a remote
node - it references the parent GPIO controller. We must not try to
parse it as a phandle.

Fixes: a060b8c511 ("gpiolib: implement low-level, shared GPIO support")
Reported-by: Cosmin Tanislav <demonsingur@gmail.com>
Closes: https://lore.kernel.org/all/2d96e464-e17c-4ff5-9a08-b215b77da04f@gmail.com/
Link: https://lore.kernel.org/r/20251126-gpio-shared-fixes-v1-2-18309c0e87b5@linaro.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
This commit is contained in:
Bartosz Golaszewski
2025-11-26 17:49:06 +01:00
parent cfab6dc070
commit 114e594e6c
1 changed files with 7 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/gpio/gpiolib-shared.c
View File

@@ -83,6 +83,13 @@ static bool gpio_shared_of_node_ignore(struct device_node *node)
if (of_node_name_eq(node, "__symbols__"))
return true;
/*
* GPIO hogs have a "gpios" property which is not a phandle and can't
* possibly refer to a shared GPIO.
*/
if (of_property_present(node, "gpio-hog"))
return true;
return false;
}