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authorIngo Molnar <mingo@kernel.org>2018-02-06 21:12:31 +0100
committerIngo Molnar <mingo@kernel.org>2018-02-06 21:12:31 +0100
commit82845079160817cc6ac64e5321bbd935e0a47b3a (patch)
tree0886d1d52428e9db14536cae4b37db896e7c360a /drivers/gpio/devres.c
parent32e839dda3ba576943365f0f5817ce5c843137dc (diff)
parent68c5735eaa5e680e701c9a2d1e3c7880bdf5ab66 (diff)
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Merge branch 'linus' into sched/urgent, to resolve conflicts
Conflicts: arch/arm64/kernel/entry.S arch/x86/Kconfig include/linux/sched/mm.h kernel/fork.c Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/gpio/devres.c')
-rw-r--r--drivers/gpio/devres.c42
1 files changed, 42 insertions, 0 deletions
diff --git a/drivers/gpio/devres.c b/drivers/gpio/devres.c
index afbff155a0ba..e82cc763633c 100644
--- a/drivers/gpio/devres.c
+++ b/drivers/gpio/devres.c
@@ -125,6 +125,48 @@ struct gpio_desc *__must_check devm_gpiod_get_index(struct device *dev,
EXPORT_SYMBOL(devm_gpiod_get_index);
/**
+ * devm_gpiod_get_from_of_node() - obtain a GPIO from an OF node
+ * @dev: device for lifecycle management
+ * @node: handle of the OF node
+ * @propname: name of the DT property representing the GPIO
+ * @index: index of the GPIO to obtain for the consumer
+ * @dflags: GPIO initialization flags
+ * @label: label to attach to the requested GPIO
+ *
+ * Returns:
+ * On successful request the GPIO pin is configured in accordance with
+ * provided @dflags.
+ *
+ * In case of error an ERR_PTR() is returned.
+ */
+struct gpio_desc *devm_gpiod_get_from_of_node(struct device *dev,
+ struct device_node *node,
+ const char *propname, int index,
+ enum gpiod_flags dflags,
+ const char *label)
+{
+ struct gpio_desc **dr;
+ struct gpio_desc *desc;
+
+ dr = devres_alloc(devm_gpiod_release, sizeof(struct gpio_desc *),
+ GFP_KERNEL);
+ if (!dr)
+ return ERR_PTR(-ENOMEM);
+
+ desc = gpiod_get_from_of_node(node, propname, index, dflags, label);
+ if (IS_ERR(desc)) {
+ devres_free(dr);
+ return desc;
+ }
+
+ *dr = desc;
+ devres_add(dev, dr);
+
+ return desc;
+}
+EXPORT_SYMBOL(devm_gpiod_get_from_of_node);
+
+/**
* devm_fwnode_get_index_gpiod_from_child - get a GPIO descriptor from a
* device's child node
* @dev: GPIO consumer