This patchset enables debugfs support and corrects all the feedback provided on an earlier RFC ('soundwire: updates for 5.4')
There is one remaining hard-coded value in intel.c that will need to be fixed in a follow-up patchset not specific to debugfs: we need to remove hard-coded Intel-specific configurations from cadence_master.c (PDI offsets, etc).
Changes since v1 (Feedback from GKH) Handle debugfs in a more self-contained way (no dentry as return or parameter) Used CONFIG_DEBUG_FS in structures and code to make it easier to remove if need be. No functional change for register dumps.
Changes since RFC (Feedback from GKH, Vinod, Guennadi, Cezary, Sanyog): removed error checks used DEFINE_SHOW_ATTRIBUTE and seq_file fixed copyright dates fixed SPDX license info to use GPL2.0 only fixed Makefile to include debugfs only if CONFIG_DEBUG_FS is selected used static inlines for fallback compilation removed intermediate variables removed hard-coded constants in loops (used registers offsets and hardware capabilities) squashed patch 3
Pierre-Louis Bossart (3): soundwire: add debugfs support soundwire: cadence_master: add debugfs register dump soundwire: intel: add debugfs register dump
drivers/soundwire/Makefile | 4 + drivers/soundwire/bus.c | 6 ++ drivers/soundwire/bus.h | 16 +++ drivers/soundwire/bus_type.c | 3 + drivers/soundwire/cadence_master.c | 107 ++++++++++++++++++++ drivers/soundwire/cadence_master.h | 4 + drivers/soundwire/debugfs.c | 151 +++++++++++++++++++++++++++++ drivers/soundwire/intel.c | 121 +++++++++++++++++++++++ drivers/soundwire/slave.c | 1 + include/linux/soundwire/sdw.h | 8 ++ 10 files changed, 421 insertions(+) create mode 100644 drivers/soundwire/debugfs.c