[RFC PATCH 19/40] soundwire: bus: improve dynamic debug comments for enumeration

Pierre-Louis Bossart
2019-07-25T23:41:37Z

update comments to provide better understanding of enumeration flows.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
---
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 bca378806d00..2354675ef104 100644
--- a/drivers/soundwire/bus.c
+++ b/drivers/soundwire/bus.c
@@ -483,7 +483,8 @@ 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;
}

@@ -540,6 +541,7 @@ 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;
}
@@ -982,6 +984,7 @@ int sdw_handle_slave_status(struct sdw_bus *bus,
int i, ret = 0;

if (status[0] == SDW_SLAVE_ATTACHED) {
+ dev_err(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