update comments to provide better understanding of enumeration flows.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
---
drivers/soundwire/bus.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/soundwire/bus.c b/drivers/soundwire/bus.c
index 89d5f1537d9b..40f7d0dc59a6 100644
--- a/drivers/soundwire/bus.c
+++ b/drivers/soundwire/bus.c
@@ -476,7 +476,8 @@ static int sdw_assign_device_num(struct sdw_slave *slave)
ret = sdw_write(slave, SDW_SCP_DEVNUMBER, dev_num);
if (ret < 0) {
- dev_err(&slave->dev, "Program device_num failed: %d\n", ret);
+ dev_err(&slave->dev, "Program device_num %d failed: %d\n",
+ dev_num, ret);
return ret;
}
@@ -533,6 +534,7 @@ static int sdw_program_device_num(struct sdw_bus *bus)
do {
ret = sdw_transfer(bus, &msg);
if (ret == -ENODATA) { /* end of device id reads */
+ dev_dbg(bus->dev, "No more devices to enumerate\n");
ret = 0;
break;
}
@@ -975,6 +977,7 @@ int sdw_handle_slave_status(struct sdw_bus *bus,
int i, ret = 0;
if (status[0] == SDW_SLAVE_ATTACHED) {
+ dev_dbg(bus->dev, "Slave attached, programming device number\n");
ret = sdw_program_device_num(bus);
if (ret)
dev_err(bus->dev, "Slave attach failed: %d\n", ret);
--
2.20.1
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