diff options
| -rw-r--r-- | drivers/soundwire/bus.c | 27 | ||||
| -rw-r--r-- | drivers/soundwire/bus.h | 8 |
2 files changed, 35 insertions, 0 deletions
diff --git a/drivers/soundwire/bus.c b/drivers/soundwire/bus.c index dfe27e3ca815..57dec61142e5 100644 --- a/drivers/soundwire/bus.c +++ b/drivers/soundwire/bus.c @@ -1163,3 +1163,30 @@ int sdw_handle_slave_status(struct sdw_bus *bus, return ret; } EXPORT_SYMBOL(sdw_handle_slave_status); + +void sdw_clear_slave_status(struct sdw_bus *bus, u32 request) +{ + struct sdw_slave *slave; + int i; + + /* Check all non-zero devices */ + for (i = 1; i <= SDW_MAX_DEVICES; i++) { + mutex_lock(&bus->bus_lock); + if (test_bit(i, bus->assigned) == false) { + mutex_unlock(&bus->bus_lock); + continue; + } + mutex_unlock(&bus->bus_lock); + + slave = sdw_get_slave(bus, i); + if (!slave) + continue; + + if (slave->status != SDW_SLAVE_UNATTACHED) + sdw_modify_slave_status(slave, SDW_SLAVE_UNATTACHED); + + /* keep track of request, used in pm_runtime resume */ + slave->unattach_request = request; + } +} +EXPORT_SYMBOL(sdw_clear_slave_status); diff --git a/drivers/soundwire/bus.h b/drivers/soundwire/bus.h index acb8d11a4c84..204204a26db8 100644 --- a/drivers/soundwire/bus.h +++ b/drivers/soundwire/bus.h @@ -165,4 +165,12 @@ sdw_update(struct sdw_slave *slave, u32 addr, u8 mask, u8 val) return sdw_write(slave, addr, tmp); } +/* + * At the moment we only track Master-initiated hw_reset. + * Additional fields can be added as needed + */ +#define SDW_UNATTACH_REQUEST_MASTER_RESET BIT(0) + +void sdw_clear_slave_status(struct sdw_bus *bus, u32 request); + #endif /* __SDW_BUS_H */ |