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spi: make OF helper available for others

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The of_find_spi_device_by_node() helper function is useful for other
modules too. Export the funciton as GPL like all other spi helper
functions and make it available if CONFIG_OF is enabled, because it isn't
related to the CONFIG_OF_DYNAMIC context. Finally add a stub if
CONFIG_OF isn't enabled, so others must not care about it.

Signed-off-by: Marco Felsch <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
This commit is contained in:
Marco Felsch 2018-09-25 11:42:29 +02:00 • committed by Mark Brown
commit 5f143af750
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2 changed files with 21 additions and 3 deletions
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7
drivers/spi/spi.c
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@ -3314,20 +3314,23 @@ EXPORT_SYMBOL_GPL(spi_write_then_read);
/*-------------------------------------------------------------------------*/
#if IS_ENABLED(CONFIG_OF_DYNAMIC)
#if IS_ENABLED(CONFIG_OF)
static int __spi_of_device_match(struct device *dev, void *data)
{
return dev->of_node == data;
}
/* must call put_device() when done with returned spi_device device */
static struct spi_device *of_find_spi_device_by_node(struct device_node *node)
struct spi_device *of_find_spi_device_by_node(struct device_node *node)
{
struct device *dev = bus_find_device(&spi_bus_type, NULL, node,
__spi_of_device_match);
return dev ? to_spi_device(dev) : NULL;
}
EXPORT_SYMBOL_GPL(of_find_spi_device_by_node);
#endif /* IS_ENABLED(CONFIG_OF) */
#if IS_ENABLED(CONFIG_OF_DYNAMIC)
static int __spi_of_controller_match(struct device *dev, const void *data)
{
return dev->of_node == data;