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regulator: add dummy function of_find_regulator_by_node 

If device tree is not enabled, of_find_regulator_by_node() should have
a dummy function since the function call is still there.

This is to fix build error after CONFIG_NO_AUTO_INLINE is introduced.
If this option is enabled, GCC will not auto-inline functions that are
not explicitly marked as inline.

In this case (no CONFIG_OF), the copmiler will report error in function
regulator_dev_lookup().

W/O NO_AUTO_INLINE, function of_get_regulator() is auto-inlined and then
the call to of_find_regulator_by_node() is optimized out since
of_get_regulator() always return NULL.

W/ NO_AUTO_INLINE, the return value of of_get_regulator() is a variable
so the call to of_find_regulator_by_node() cannot be optimized out. So
we need a stub of_find_regulator_by_node().

static struct regulator_dev *regulator_dev_lookup(struct device *dev,
						  const char *supply)
{
	struct regulator_dev *r = NULL;
	struct device_node *node;
	struct regulator_map *map;
	const char *devname = NULL;

	regulator_supply_alias(&dev, &supply);

	/* first do a dt based lookup */
	if (dev && dev->of_node) {
		node = of_get_regulator(dev, supply);
		if (node) {
			r = of_find_regulator_by_node(node);
			if (r)
				return r;
	...

Signed-off-by: Changbin Du <changbin.du@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Changbin Du 2018-05-02 21:44:57 +08:00 committed by Mark Brown
parent 60891ceb80
commit 08813e0ec1
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 7 additions and 2 deletions
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9
drivers/regulator/internal.h
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@ -56,14 +56,19 @@ static inline struct regulator_dev *dev_to_rdev(struct device *dev)
return container_of(dev, struct regulator_dev, dev);
}
struct regulator_dev *of_find_regulator_by_node(struct device_node *np);
#ifdef CONFIG_OF
struct regulator_dev *of_find_regulator_by_node(struct device_node *np);
struct regulator_init_data *regulator_of_get_init_data(struct device *dev,
const struct regulator_desc *desc,
struct regulator_config *config,
struct device_node **node);
#else
static inline struct regulator_dev *
of_find_regulator_by_node(struct device_node *np)
{
return NULL;
}
static inline struct regulator_init_data *
regulator_of_get_init_data(struct device *dev,
const struct regulator_desc *desc,