linux/drivers/devfreq, branch v5.6

Revert "PM / devfreq: Modify the device name as devfreq(X) for sysfs"

2020-02-24T02:14:29Z

This reverts commit 4585fbcb5331fc910b7e553ad3efd0dd7b320d14. The name changing as devfreq(X) breaks some user space applications, such as Android HAL from Unisoc and Hikey [1]. The device name will be changed unexpectly after every boot depending on module init sequence. It will make trouble to setup some system configuration like selinux for Android. So we'd like to revert it back to old naming rule before any better way being found. [1] https://lkml.org/lkml/2018/5/8/1042 Cc: John Stultz Cc: Greg Kroah-Hartman Cc: stable@vger.kernel.org Signed-off-by: Orson Zhai Acked-by: Greg Kroah-Hartman Signed-off-by: Chanwoo Choi

PM / devfreq: Add debugfs support with devfreq_summary file

2020-01-16T10:14:49Z

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 Signed-off-by: Chanwoo Choi

PM / devfreq: exynos: Rename Exynos to lowercase

2020-01-06T01:50:09Z

Fix up inconsistent usage of upper and lowercase letters in "Exynos" name. "EXYNOS" is not an abbreviation but a regular trademarked name. Therefore it should be written with lowercase letters starting with capital letter. The lowercase "Exynos" name is promoted by its manufacturer Samsung Electronics Co., Ltd., in advertisement materials and on website. Signed-off-by: Krzysztof Kozlowski Signed-off-by: Chanwoo Choi

PM / devfreq: imx8m-ddrc: Fix inconsistent IS_ERR and PTR_ERR

2019-12-30T18:09:57Z

Fix inconsistent IS_ERR and PTR_ERR in imx8m_ddrc_probe(). Detected using Coccinelle. Signed-off-by: YueHaibing Signed-off-by: Chanwoo Choi

PM / devfreq: exynos-bus: Add error log when fail to get devfreq-event

2019-12-30T00:59:06Z

Adding an error log makes it easier to trace the function's error path. Because the error code may be rewritten on return, print error code here. Signed-off-by: Yangtao Li Signed-off-by: Chanwoo Choi

PM / devfreq: exynos-bus: Disable devfreq-event device when fails

2019-12-30T00:59:06Z

The exynos_bus_profile_init process may fail, but the devfreq event device remains enabled. Call devfreq_event_disable_edev on the error return path. Signed-off-by: Yangtao Li Signed-off-by: Chanwoo Choi

PM / devfreq: rk3399_dmc: Disable devfreq-event device when fails

2019-12-30T00:59:06Z

The probe process may fail, but the devfreq event device remains enabled. Call devfreq_event_disable_edev on the error return path. Signed-off-by: Yangtao Li Signed-off-by: Chanwoo Choi

PM / devfreq: imx8m-ddrc: Remove unused defines

2019-12-30T00:59:06Z

The IMX_SIP_DDR_DVFS_WAIT_CHANGE and IMX_SIP_DDR_FREQ_SET_HIGH defines are not used so they can be removed. Fixes: 518e99e2a22e ("PM / devfreq: Add dynamic scaling for imx8m ddr controller") Reported-by: Shawn Guo Signed-off-by: Leonard Crestez Signed-off-by: Chanwoo Choi

PM / devfreq: exynos-bus: Reduce goto statements and remove unused headers

2019-12-30T00:59:06Z

Improve code readability by changing the goto statements as well as eliminating a few more goto statements (related to return paths). Moreover, remove unused header file and adds a missing . Signed-off-by: Artur Świgoń [cw00.choi: Edit patch title and description] Signed-off-by: Chanwoo Choi

PM / devfreq: rk3399_dmc: Add COMPILE_TEST and HAVE_ARM_SMCCC dependency

2019-12-30T00:59:06Z

To build test, add COMPILE_TEST depedency to both ARM_RK3399_DMC_DEVFREQ and DEVFREQ_EVENT_ROCKCHIP_DFI configuration. And ARM_RK3399_DMC_DEVFREQ used the SMCCC interface so that add HAVE_ARM_SMCCC dependency to prevent the build break. Reported-by: kbuild test robot Signed-off-by: Chanwoo Choi