diff options
| -rw-r--r-- | drivers/soundwire/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/soundwire/slave.c | 14 |
2 files changed, 15 insertions, 0 deletions
diff --git a/drivers/soundwire/Kconfig b/drivers/soundwire/Kconfig index 4d8f3b7024ae..f66f869dff2e 100644 --- a/drivers/soundwire/Kconfig +++ b/drivers/soundwire/Kconfig @@ -6,6 +6,7 @@ menuconfig SOUNDWIRE tristate "SoundWire support" depends on ACPI || OF + depends on SND_SOC_SDCA_OPTIONAL help SoundWire is a 2-Pin interface with data and clock line ratified by the MIPI Alliance. SoundWire is used for transporting data diff --git a/drivers/soundwire/slave.c b/drivers/soundwire/slave.c index f1a4df6cfebd..97cf8bcca047 100644 --- a/drivers/soundwire/slave.c +++ b/drivers/soundwire/slave.c @@ -5,6 +5,7 @@ #include <linux/of.h> #include <linux/soundwire/sdw.h> #include <linux/soundwire/sdw_type.h> +#include <sound/sdca.h> #include "bus.h" #include "sysfs_local.h" @@ -70,6 +71,17 @@ int sdw_slave_add(struct sdw_bus *bus, list_add_tail(&slave->node, &bus->slaves); mutex_unlock(&bus->bus_lock); + /* + * The Soundwire driver probe may optionally register SDCA + * sub-devices, one per Function. This means the information + * on the SDCA revision and the number/type of Functions need + * to be extracted from platform firmware before the SoundWire + * driver probe, and as a consequence before the SoundWire + * device_register() below. + */ + sdca_lookup_interface_revision(slave); + sdca_lookup_functions(slave); + ret = device_register(&slave->dev); if (ret) { dev_err(bus->dev, "Failed to add slave: ret %d\n", ret); @@ -259,3 +271,5 @@ int sdw_of_find_slaves(struct sdw_bus *bus) return 0; } + +MODULE_IMPORT_NS(SND_SOC_SDCA); |