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authorMarco Felsch <m.felsch@pengutronix.de>2018-09-25 12:42:29 +0300
committerMark Brown <broonie@kernel.org>2018-09-28 01:36:03 +0300
commit5f143af7501e7c435c56e181a655493edaa92509 (patch)
tree8f46955879e9a026fc3740cdbd734bb9025feaba /include/linux/spi
parent5b394b2ddf0347bef56e50c69a58773c94343ff3 (diff)
downloadlinux-5f143af7501e7c435c56e181a655493edaa92509.tar.xz
spi: make OF helper available for others
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>
Diffstat (limited to 'include/linux/spi')
-rw-r--r--include/linux/spi/spi.h17
1 files changed, 16 insertions, 1 deletions
diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h
index a64235e05321..e9ebfcd2e932 100644
--- a/include/linux/spi/spi.h
+++ b/include/linux/spi/spi.h
@@ -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