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soundwire: add debugfs support

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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>
This commit is contained in:
Pierre-Louis Bossart
2019-08-21 13:58:18 -05:00
committed by Vinod Koul
parent e87cf35835
commit bf03473d5b
7 changed files with 189 additions and 0 deletions
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drivers/soundwire/Makefile
+4
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@@ -7,6 +7,10 @@
soundwire-bus-objs := bus_type.o bus.o slave.o mipi_disco.o stream.o
obj-$(CONFIG_SOUNDWIRE_BUS) += soundwire-bus.o
ifdef CONFIG_DEBUG_FS
soundwire-bus-objs += debugfs.o
endif
#Cadence Objs
soundwire-cadence-objs := cadence_master.o
obj-$(CONFIG_SOUNDWIRE_CADENCE) += soundwire-cadence.o