diff options
| author | Bartosz Golaszewski <bartosz.golaszewski@linaro.org> | 2025-11-26 17:49:06 +0100 |
|---|---|---|
| committer | Bartosz Golaszewski <bartosz.golaszewski@linaro.org> | 2025-11-28 09:29:14 +0100 |
| commit | 114e594e6cb791ce7c839ccfbe153ecfa3e7abce (patch) | |
| tree | fca8201fb18c06cef616974167e08e3be8699983 | |
| parent | cfab6dc0700c3b9120dab726fc184c3b4500cc5b (diff) | |
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 <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>
| -rw-r--r-- | drivers/gpio/gpiolib-shared.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/gpio/gpiolib-shared.c b/drivers/gpio/gpiolib-shared.c index 3a6d4cd54081..cd4dd6fc76ab 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; } |