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authorPierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>2019-08-21 20:58:18 +0200
committerVinod Koul <vkoul@kernel.org>2019-08-23 08:31:02 +0200
commitbf03473d5bcc85fbe9533fa042f67809d8520c4e (patch)
treef7011ad3cc5026c8d2644ba7bede251510ec2d98 /drivers/soundwire/bus.c
parentsoundwire: intel: remove unused variables (diff)
downloadlinux-bf03473d5bcc85fbe9533fa042f67809d8520c4e.tar.xz
linux-bf03473d5bcc85fbe9533fa042f67809d8520c4e.zip
soundwire: add debugfs support
Add base debugfs mechanism for SoundWire bus by creating soundwire root and master-N and slave-x hierarchy. Also add SDW Slave SCP, DP0 and DP-N register debug file. Registers not implemented will print as "XX" Credits: this patch is based on an earlier internal contribution by Vinod Koul, Sanyog Kale, Shreyas Nc and Hardik Shah. Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Sanyog Kale <sanyog.r.kale@intel.com> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Link: https://lore.kernel.org/r/20190821185821.12690-2-pierre-louis.bossart@linux.intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/soundwire/bus.c')
-rw-r--r--drivers/soundwire/bus.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/soundwire/bus.c b/drivers/soundwire/bus.c
index 50f9cc5eb5f6..728db3ebad6e 100644
--- a/drivers/soundwire/bus.c
+++ b/drivers/soundwire/bus.c
@@ -49,6 +49,8 @@ int sdw_add_bus_master(struct sdw_bus *bus)
}
}
+ sdw_bus_debugfs_init(bus);
+
/*
* Device numbers in SoundWire are 0 through 15. Enumeration device
* number (0), Broadcast device number (15), Group numbers (12 and
@@ -109,6 +111,8 @@ static int sdw_delete_slave(struct device *dev, void *data)
struct sdw_slave *slave = dev_to_sdw_dev(dev);
struct sdw_bus *bus = slave->bus;
+ sdw_slave_debugfs_exit(slave);
+
mutex_lock(&bus->bus_lock);
if (slave->dev_num) /* clear dev_num if assigned */
@@ -130,6 +134,8 @@ static int sdw_delete_slave(struct device *dev, void *data)
void sdw_delete_bus_master(struct sdw_bus *bus)
{
device_for_each_child(bus->dev, NULL, sdw_delete_slave);
+
+ sdw_bus_debugfs_exit(bus);
}
EXPORT_SYMBOL(sdw_delete_bus_master);