linux-kernel - [RFC 04/12] gpio: Probe GPIO drivers on demand

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Message-Id: <1429886848-5843-5-git-send-email-tomeu.vizoso@collabora.com>
Date:	Fri, 24 Apr 2015 16:47:20 +0200
From:	Tomeu Vizoso <tomeu.vizoso@...labora.com>
To:	linux-kernel@...r.kernel.org
Cc:	Thierry Reding <thierry.reding@...il.com>,
	Stéphane Marchesin <marcheu@...omium.org>,
	Alexander Holler <holler@...oftware.de>,
	Olof Johansson <olof@...om.net>,
	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org,
	Mark Rutland <mark.rutland@....com>,
	Tomeu Vizoso <tomeu.vizoso@...labora.com>
Subject: [RFC 04/12] gpio: Probe GPIO drivers on demand

Ensure that the device corresponding to the DT node of the gpiochip has
been registered.
---
 drivers/gpio/gpiolib-of.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
index a6c67c6..190183d 100644
--- a/drivers/gpio/gpiolib-of.c
+++ b/drivers/gpio/gpiolib-of.c
@@ -20,6 +20,7 @@
 #include <linux/of.h>
 #include <linux/of_address.h>
 #include <linux/of_gpio.h>
+#include <linux/of_platform.h>
 #include <linux/pinctrl/pinctrl.h>
 #include <linux/slab.h>
 #include <linux/gpio/machine.h>
@@ -95,6 +96,8 @@ struct gpio_desc *of_get_named_gpiod_flags(struct device_node *np,
 		return ERR_PTR(ret);
 	}
 
+	of_platform_device_ensure(gg_data.gpiospec.np);
+
 	gpiochip_find(&gg_data, of_gpiochip_find_and_xlate);
 
 	of_node_put(gg_data.gpiospec.np);
-- 
2.3.6

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