Messages in this thread | | | From | Jonghwa Lee <> | Subject | [PATCH 0/2] devfreq: Add sysfs node for representing frequency transition information. | Date | Thu, 16 Aug 2012 15:49:25 +0900 |
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This patchset adds sysfs node to devfreq's frame work to measure trasition of frequency on runtime. It will be created under '/sys/class/devfreq/<device name>/' as the name of 'trans_state'. It contains transition table which represents total number of transition of each frerquency state to others and also time spent the state.
--- example for device having 3 frequency levels ---------------------------------------------------- <freq level #1> <freq level #2> <freq level #3> time_spent * <freq level #1> # of freq1 to freq2 # of freq1 to freq3 t1 <freq level #2> # of freq2 to freq1 # of freq2 to freq3 t2 <freq level #3> # of freq3 to freq1 # of freq3 to freq2 t3 total transition : N ----------------------------------------------------------------------------------------------------- ('*' represents last frequency changed at the time you inspect the node.)
Patch 1: Make sysfs node to DEVFREQ frame work. Patch 2: Initialize freq_table and max_state in exynos4 devfreq driver to be used for frequency trnasition measurement.
Jonghwa Lee (2): devfreq: Add sysfs node for representing frequency transition information. devfreq: exynos4: Support initialization of freq_table and max_state of devfreq's profile.
drivers/devfreq/devfreq.c | 89 +++++++++++++++++++++++++++++++++++++++++ drivers/devfreq/exynos4_bus.c | 30 +++++++++++++- include/linux/devfreq.h | 9 ++++ 3 files changed, 127 insertions(+), 1 deletions(-)
-- 1.7.4.1
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