Chanwoo Choi
490a421bc5
PM / devfreq: Add debugfs support with devfreq_summary file ...
Add debugfs interface to provide debugging information of devfreq device.
It contains 'devfreq_summary' entry to show the summary of registered
devfreq devices as following and the additional debugfs file will be added.
- /sys/kernel/debug/devfreq/devfreq_summary
[Detailed description of each field of 'devfreq_summary' debugfs file]
- dev_name : Device name of h/w
- dev : Device name made by devfreq core
- parent_dev : If devfreq device uses the passive governor,
show parent devfreq device name. Otherwise, show 'null'.
- governor : Devfreq governor name
- polling_ms : If devfreq device uses the simple_ondemand governor,
polling_ms is necessary for the period. (unit: millisecond)
- cur_freq_Hz : Current frequency (unit: Hz)
- min_freq_Hz : Minimum frequency (unit: Hz)
- max_freq_Hz : Maximum frequency (unit: Hz)
[For example on Exynos5422-based Odroid-XU3 board]
$ cat /sys/kernel/debug/devfreq/devfreq_summary
dev_name dev parent_dev governor polling_ms cur_freq_Hz min_freq_Hz max_freq_Hz
------------------------------ ---------- ---------- --------------- ---------- ------------ ------------ ------------
10c20000.memory-controller devfreq0 null simple_ondemand 0 165000000 165000000 825000000
soc:bus_wcore devfreq1 null simple_ondemand 50 532000000 88700000 532000000
soc:bus_noc devfreq2 devfreq1 passive 0 111000000 66600000 111000000
soc:bus_fsys_apb devfreq3 devfreq1 passive 0 222000000 111000000 222000000
soc:bus_fsys devfreq4 devfreq1 passive 0 200000000 75000000 200000000
soc:bus_fsys2 devfreq5 devfreq1 passive 0 200000000 75000000 200000000
soc:bus_mfc devfreq6 devfreq1 passive 0 333000000 83250000 333000000
soc:bus_gen devfreq7 devfreq1 passive 0 266000000 88700000 266000000
soc:bus_peri devfreq8 devfreq1 passive 0 66600000 66600000 66600000
soc:bus_g2d devfreq9 devfreq1 passive 0 333000000 83250000 333000000
soc:bus_g2d_acp devfreq10 devfreq1 passive 0 266000000 66500000 266000000
soc:bus_jpeg devfreq11 devfreq1 passive 0 300000000 75000000 300000000
soc:bus_jpeg_apb devfreq12 devfreq1 passive 0 166500000 83250000 166500000
soc:bus_disp1_fimd devfreq13 devfreq1 passive 0 200000000 120000000 200000000
soc:bus_disp1 devfreq14 devfreq1 passive 0 300000000 120000000 300000000
soc:bus_gscl_scaler devfreq15 devfreq1 passive 0 300000000 150000000 300000000
soc:bus_mscl devfreq16 devfreq1 passive 0 666000000 84000000 666000000
[lkp: Reported the build error]
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
2020-01-16 19:14:49 +09:00
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2020-01-06 10:50:09 +09:00
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2019-12-30 09:59:06 +09:00
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2019-11-06 12:04:01 +09:00
490a421bc5