[PATCH V3 00/17] thermal: cpu_cooling: improve interaction with cpufreq core

Viresh Kumar
2017-04-19T05:30:37Z

Hi Guys,

The cpu_cooling driver is designed to use CPU frequency scaling to avoid
high thermal states for a platform. But it wasn't glued really well with
cpufreq core. For example clipped-cpus is copied from the policy
structure and its much better to use the policy->cpus (or related_cpus)
fields directly as they may have got updated. Not that things were
broken before this series, but they can be optimized a bit more.

This series tries to improve interactions between cpufreq core and
cpu_cooling driver and does some fixes/cleanups to the cpu_cooling
driver.

I have tested it on ARM 32 (exynos) and 64 bit (hikey) boards and have
pushed them for 0-day build bot and kernel CI testing as well. We should
know if something is broken with these.

@Lukasz: It would be good if you can give them a test, specially because
of your work on the "power" specific bits in the driver. This series
already has the improvements you suggested.

Pushed here as well:

git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm.git thermal/cooling

V2->V3:
- Additional check to guarantee that policy is valid.
- Initialize freq-table and cpufreq_cdev->policy fields before they are
used by the power-cooling functionality.
- Thanks Lukasz for testing out and suggesting these changes.

V1->V2:
- Name cpufreq cooling dev as cpufreq_cdev everywhere (Eduardo).

--
viresh

Viresh Kumar (17):
thermal: cpu_cooling: Avoid accessing potentially freed structures
thermal: cpu_cooling: rearrange globals
thermal: cpu_cooling: Name cpufreq cooling devices as cpufreq_cdev
thermal: cpu_cooling: replace cool_dev with cdev
thermal: cpu_cooling: remove cpufreq_cooling_get_level()
thermal: cpu_cooling: get rid of a variable in cpufreq_set_cur_state()
thermal: cpu_cooling: use cpufreq_policy to register cooling device
cpufreq: create cpufreq_table_count_valid_entries()
thermal: cpu_cooling: store cpufreq policy
thermal: cpu_cooling: OPPs are registered for all CPUs
thermal: cpu_cooling: get rid of 'allowed_cpus'
thermal: cpu_cooling: merge frequency and power tables
thermal: cpu_cooling: create structure for idle time stats
thermal: cpu_cooling: get_level() can't fail
thermal: cpu_cooling: don't store cpu_dev in cpufreq_cdev
thermal: cpu_cooling: 'freq' can't be zero in cpufreq_state2power()
thermal: cpu_cooling: Rearrange struct cpufreq_cooling_device

drivers/cpufreq/arm_big_little.c | 2 +-
drivers/cpufreq/cpufreq-dt.c | 2 +-
drivers/cpufreq/cpufreq_stats.c | 13 +-
drivers/cpufreq/dbx500-cpufreq.c | 2 +-
drivers/cpufreq/mt8173-cpufreq.c | 4 +-
drivers/cpufreq/qoriq-cpufreq.c | 3 +-
drivers/thermal/cpu_cooling.c | 602 +++++++++------------
drivers/thermal/imx_thermal.c | 22 +-
drivers/thermal/ti-soc-thermal/ti-thermal-common.c | 22 +-
include/linux/cpu_cooling.h | 32 +-
include/linux/cpufreq.h | 14 +
11 files changed, 311 insertions(+), 407 deletions(-)

--
2.12.0.432.g71c3a4f4ba37