[PATCH v2 07/22] gpio: Probe GPIO drivers on demand

Tomeu Vizoso tomeu.vizoso at collabora.com
Tue Jul 28 06:19:38 PDT 2015

When looking up a gpiochip through its firmware node, probe it if it
hasn't already.

The goal is to reduce deferred probes to a minimum, as it makes it very
cumbersome to find out why a device failed to probe, and can introduce
very big delays in when a critical device is probed.

Signed-off-by: Tomeu Vizoso <tomeu.vizoso at collabora.com>

Changes in v2: None

 drivers/gpio/gpiolib-of.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
index fa6e3c8823d6..31a6b18a6542 100644
--- a/drivers/gpio/gpiolib-of.c
+++ b/drivers/gpio/gpiolib-of.c
@@ -95,6 +95,8 @@ struct gpio_desc *of_get_named_gpiod_flags(struct device_node *np,
 		return ERR_PTR(ret);
+	fwnode_ensure_device(&gg_data.gpiospec.np->fwnode);
 	gpiochip_find(&gg_data, of_gpiochip_find_and_xlate);

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