diff options
Diffstat (limited to 'drivers/gpio/gpiolib-shared.c')
| -rw-r--r-- | drivers/gpio/gpiolib-shared.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/gpio/gpiolib-shared.c b/drivers/gpio/gpiolib-shared.c index 1fcbf53b6eca..fa1d16635ea7 100644 --- a/drivers/gpio/gpiolib-shared.c +++ b/drivers/gpio/gpiolib-shared.c @@ -315,6 +315,24 @@ int gpio_device_setup_shared(struct gpio_device *gdev) guard(mutex)(&gpio_shared_lock); list_for_each_entry(entry, &gpio_shared_list, list) { + list_for_each_entry(ref, &entry->refs, list) { + if (gdev->dev.parent == &ref->adev.dev) { + /* + * This is a shared GPIO proxy. Mark its + * descriptor as such and return here. + */ + __set_bit(GPIOD_FLAG_SHARED_PROXY, + &gdev->descs[0].flags); + return 0; + } + } + } + + /* + * This is not a shared GPIO proxy but it still may be the device + * exposing shared pins. Find them and create the proxy devices. + */ + list_for_each_entry(entry, &gpio_shared_list, list) { if (!device_match_fwnode(&gdev->dev, entry->fwnode)) continue; |