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spi: Make spi_alloc_device and spi_add_device public again

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This functions were previously made private since they
were not used. However, these functions will be needed
again.

Partial revert of commit da21fde0fd
("spi: Make several public functions private to spi.c")

Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20220121172431.6876-2-sbinding@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Stefan Binding 2022-01-21 17:24:23 +00:00 committed by Mark Brown
parent e783362eb5
commit e3dc139950
No known key found for this signature in database
GPG key ID: 24D68B725D5487D0
2 changed files with 16 additions and 2 deletions
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6
drivers/spi/spi.c
View file

@ -532,7 +532,7 @@ static DEFINE_MUTEX(board_lock);
*
* Return: a pointer to the new device, or NULL.
*/
static struct spi_device *spi_alloc_device(struct spi_controller *ctlr)
struct spi_device *spi_alloc_device(struct spi_controller *ctlr)
{
struct spi_device *spi;
@ -557,6 +557,7 @@ static struct spi_device *spi_alloc_device(struct spi_controller *ctlr)
device_initialize(&spi->dev);
return spi;
}
EXPORT_SYMBOL_GPL(spi_alloc_device);
static void spi_dev_set_name(struct spi_device *spi)
{
@ -652,7 +653,7 @@ static int __spi_add_device(struct spi_device *spi)
*
* Return: 0 on success; negative errno on failure
*/
static int spi_add_device(struct spi_device *spi)
int spi_add_device(struct spi_device *spi)
{
struct spi_controller *ctlr = spi->controller;
struct device *dev = ctlr->dev.parent;
@ -673,6 +674,7 @@ static int spi_add_device(struct spi_device *spi)
mutex_unlock(&ctlr->add_lock);
return status;
}
EXPORT_SYMBOL_GPL(spi_add_device);
static int spi_add_device_locked(struct spi_device *spi)
{

12
include/linux/spi/spi.h
View file

@ -1452,7 +1452,19 @@ spi_register_board_info(struct spi_board_info const *info, unsigned n)
* use spi_new_device() to describe each device. You can also call
* spi_unregister_device() to start making that device vanish, but
* normally that would be handled by spi_unregister_controller().
*
* You can also use spi_alloc_device() and spi_add_device() to use a two
* stage registration sequence for each spi_device. This gives the caller
* some more control over the spi_device structure before it is registered,
* but requires that caller to initialize fields that would otherwise
* be defined using the board info.
*/
extern struct spi_device *
spi_alloc_device(struct spi_controller *ctlr);
extern int
spi_add_device(struct spi_device *spi);
extern struct spi_device *
spi_new_device(struct spi_controller *, struct spi_board_info *);