From 391c970c0dd1100e3b9e1681f7d0f20aac35455a Mon Sep 17 00:00:00 2001
From: Anton Vorontsov <avorontsov@ru.mvista.com>
Date: Tue, 8 Jun 2010 07:48:17 -0600
Subject: of/gpio: add default of_xlate function if device has a node pointer

Implement generic OF gpio hooks and thus make device-enabled GPIO chips
(i.e.  the ones that have gpio_chip->dev specified) automatically attach
to the OpenFirmware subsystem.  Which means that now we can handle I2C and
SPI GPIO chips almost* transparently.

* "Almost" because some chips still require platform data, and for these
  chips OF-glue is still needed, though with this change the glue will
  be much smaller.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Cc: Bill Gatliff <bgat@billgatliff.com>
Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Jean Delvare <khali@linux-fr.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
CC: linux-kernel@vger.kernel.org
CC: devicetree-discuss@lists.ozlabs.org
---
 drivers/gpio/gpiolib.c | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'drivers/gpio/gpiolib.c')

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 73fd328f6fe4..83cbc34e3a76 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -8,6 +8,7 @@
 #include <linux/debugfs.h>
 #include <linux/seq_file.h>
 #include <linux/gpio.h>
+#include <linux/of_gpio.h>
 #include <linux/idr.h>
 #include <linux/slab.h>
 
@@ -1099,6 +1100,8 @@ int gpiochip_add(struct gpio_chip *chip)
 		}
 	}
 
+	of_gpiochip_add(chip);
+
 unlock:
 	spin_unlock_irqrestore(&gpio_lock, flags);
 
@@ -1133,6 +1136,8 @@ int gpiochip_remove(struct gpio_chip *chip)
 
 	spin_lock_irqsave(&gpio_lock, flags);
 
+	of_gpiochip_remove(chip);
+
 	for (id = chip->base; id < chip->base + chip->ngpio; id++) {
 		if (test_bit(FLAG_REQUESTED, &gpio_desc[id].flags)) {
 			status = -EBUSY;
-- 
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