tree 151e12b556d30b429a08f41931953b70e4842776
parent 1eaaa37dec24745fac764e8a9d61ce3ea4558ec5
author Xiaoyu Ye <benyxy@codeaurora.org> 1534381999 -0700
committer Gerrit - the friendly Code Review server <code-review@localhost> 1535068709 -0700

ASoC: wcd934x-dsp-cntl: add debugfs node to perform debug dumps

Currently, for any WDSP errors, the driver collects the debug
dumps/information based on trigger from userspace. This is protected
under CONFIG_DEBUG_FS and should not be run unless stress tests are
executed and this functionality is explicitly enabled since
performing debug dumps could possible leave the WDSP in bad state.
Add debug node to control dumping debug information and not rely
only on CONFIG_DEBUG_FS

To enable debug dumps:
echo 1 > /sys/kernel/debug/wdsp0/debug_dump_enable

To disable debug dumps:
echo 0 > /sys/kernel/debug/wdsp0/debug_dump_enable

Change-Id: I67d8781839d9caee16e6bf6a5befd9010ccaafc0
Signed-off-by: Bhalchandra Gajare <gajare@codeaurora.org>
Signed-off-by: Xiaoyu Ye <benyxy@codeaurora.org>