tree 28dd03a93c69dc4929326733e2ad4e2493e7d84f
parent 36ff23f309a8e51620b09b3a70ec7eb15a7abf12
author Sujit Reddy Thumma <sthumma@codeaurora.org> 1360809832 +0530
committer Sujit Reddy Thumma <sthumma@codeaurora.org> 1365415179 +0530

mmc: core: Log MMC clock frequency transitions

Use kernel's ftrace support to capture MMC clock frequency
transitions which can be useful for debugging issues related
to power consumption.

Usage:
mount -t debugfs none /sys/kernel/debug
echo 1 > /sys/kernel/debug/tracing/events/mmc/mmc_clk/enable
cat /sys/kernel/debug/tracing/trace_pipe

Change-Id: I25c4ee39dcbe30e7665902a9f723a5a421b55ca3
Signed-off-by: Sujit Reddy Thumma <sthumma@codeaurora.org>