From: Bartosz Golaszewski Date: Wed, 26 Nov 2025 16:49:06 +0000 (+0100) Subject: gpio: shared: ignore GPIO hogs when traversing the device tree X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=114e594e6cb791ce7c839ccfbe153ecfa3e7abce;p=thirdparty%2Flinux.git gpio: shared: ignore GPIO hogs when traversing the device tree 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: a060b8c511ab ("gpiolib: implement low-level, shared GPIO support") Reported-by: Cosmin Tanislav 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 --- diff --git a/drivers/gpio/gpiolib-shared.c b/drivers/gpio/gpiolib-shared.c index 3a6d4cd54081e..cd4dd6fc76abf 100644 --- a/drivers/gpio/gpiolib-shared.c +++ b/drivers/gpio/gpiolib-shared.c @@ -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; }