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authorGrant Likely <grant.likely@secretlab.ca>2010-06-08 07:48:16 -0600
committerGrant Likely <grant.likely@secretlab.ca>2010-07-05 16:14:30 -0600
commit594fa265e084073443390c5b93d5410fd28e9bcd (patch)
tree42c0e5536ae2fd016159e1e1bd1f27f0a9f3cac2 /arch/microblaze
parenta19e3da5bc5fc6c10ab73f310bea80f3845b4531 (diff)
downloadop-kernel-dev-594fa265e084073443390c5b93d5410fd28e9bcd.zip
op-kernel-dev-594fa265e084073443390c5b93d5410fd28e9bcd.tar.gz
of/gpio: stop using device_node data pointer to find gpio_chip
Currently the kernel uses the struct device_node.data pointer to resolve a struct gpio_chip pointer from a device tree node. However, the .data member doesn't provide any type checking and there aren't any rules enforced on what it should be used for. There's no guarantee that the data stored in it actually points to an gpio_chip pointer. Instead of relying on the .data pointer, this patch modifies the code to add a lookup function which scans through the registered gpio_chips and returns the gpio_chip that has a pointer to the specified device_node. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> CC: Andrew Morton <akpm@linux-foundation.org> CC: Anton Vorontsov <avorontsov@ru.mvista.com> CC: 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: linux-kernel@vger.kernel.org CC: devicetree-discuss@lists.ozlabs.org
Diffstat (limited to 'arch/microblaze')
-rw-r--r--arch/microblaze/kernel/reset.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/microblaze/kernel/reset.c b/arch/microblaze/kernel/reset.c
index 5476d3c..bd8ccab 100644
--- a/arch/microblaze/kernel/reset.c
+++ b/arch/microblaze/kernel/reset.c
@@ -39,7 +39,7 @@ static int of_reset_gpio_handle(void)
goto err0;
}
- gc = gpio->data;
+ gc = of_node_to_gpiochip(gpio);
if (!gc) {
pr_debug("%s: gpio controller %s isn't registered\n",
root->full_name, gpio->full_name);
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