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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
..
event PM / devfreq: exynos: Rename Exynos to lowercase 2020-01-06 10:50:09 +09:00
Kconfig PM / devfreq: exynos: Rename Exynos to lowercase 2020-01-06 10:50:09 +09:00
Makefile PM / devfreq: Add dynamic scaling for imx8m ddr controller 2019-12-30 09:59:05 +09:00
devfreq-event.c PM / devfreq: Fix multiple kernel-doc warnings 2019-12-30 09:59:06 +09:00
devfreq.c PM / devfreq: Add debugfs support with devfreq_summary file 2020-01-16 19:14:49 +09:00
exynos-bus.c PM / devfreq: exynos-bus: Add error log when fail to get devfreq-event 2019-12-30 09:59:06 +09:00
governor.h PM / devfreq: Add new interrupt_driven flag for governors 2019-11-06 12:04:01 +09:00
governor_passive.c PM / devfreq: passive: fix compiler warning 2019-08-26 21:37:37 +09:00
governor_performance.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
governor_powersave.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
governor_simpleondemand.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
governor_userspace.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
imx8m-ddrc.c PM / devfreq: imx8m-ddrc: Fix inconsistent IS_ERR and PTR_ERR 2019-12-31 03:09:57 +09:00
rk3399_dmc.c PM / devfreq: rk3399_dmc: Disable devfreq-event device when fails 2019-12-30 09:59:06 +09:00
tegra20-devfreq.c PM / devfreq: Introduce driver for NVIDIA Tegra20 2019-08-24 20:11:12 +09:00
tegra30-devfreq.c PM / devfreq: tegra30: Tune up MCCPU boost-down coefficient 2019-11-06 12:04:01 +09:00