tree 1ff2e94674b005e169b289d8e9bd19f8a33363ed
parent 83707ea3db41ddad347d5c2b6d9ad5b8aaba8518
author Colin Cross <ccross@android.com> 1336604990 -0700
committer Dmitry Shmidt <dimitrysh@google.com> 1485553903 -0800

ANDROID: trace: power: add trace_clock_set_parent

Adds a new trace event to be called from clk_set_parent.  Some
cpufreq drivers, including Tegra, reparent the cpu clock to a
slower clock while the main pll is relocking, tracing
clk_set_parent allows traces to show how for long the cpu is
running slower.

Uses a separate TRACE_EVENT instead of the clock event class to
allow the event to contain string names for the child and the
parent.

Signed-off-by: Colin Cross <ccross@android.com>