xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

spi: make OF helper available for others

Browse Source 
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 <m.felsch@pengutronix.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Marco Felsch
2018-09-25 11:42:29 +02:00
committed by Mark Brown
parent 5b394b2ddf
commit 5f143af750
2 changed files with 21 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
include/linux/spi/spi.h
View File

@@ -1277,7 +1277,6 @@ spi_register_board_info(struct spi_board_info const *info, unsigned n)
{ return 0; }
#endif
/* If you're hotplugging an adapter with devices (parport, usb, etc)
* use spi_new_device() to describe each device. You can also call
* spi_unregister_device() to start making that device vanish, but
@@ -1309,6 +1308,22 @@ spi_transfer_is_last(struct spi_controller *ctlr, struct spi_transfer *xfer)
return list_is_last(&xfer->transfer_list, &ctlr->cur_msg->transfers);
}
/* OF support code */
#if IS_ENABLED(CONFIG_OF)
/* must call put_device() when done with returned spi_device device */
extern struct spi_device *
of_find_spi_device_by_node(struct device_node *node);
#else
static inline struct spi_device *
of_find_spi_device_by_node(struct device_node *node)
{
return NULL;
}
#endif /* IS_ENABLED(CONFIG_OF) */
/* Compatibility layer */
#define spi_master spi_controller