linux-toradex.git/include/linux/devfreq.h, branch v5.10-rc3

PM / devfreq: remove a duplicated kernel-doc markup

2020-10-16T05:28:20+00:00

The update_devfreq() is also documented at devfreq.c, which
has a more complete note.

So, drop the duplicated markup, in order to avoid this
warning:
	.../Documentation/driver-api/device_link.rst: WARNING: Duplicate C declaration, also defined in 'driver-api/infrastructure'.
	Declaration is 'device_link_state'.

(and to cause a problem with cross-references to it)

Signed-off-by: Mauro Carvalho Chehab

PM / devfreq: Change prototype of devfreq_get_devfreq_by_phandle function

2020-09-29T08:50:10+00:00

Previously, devfreq core support 'devfreq' property in order to get
the devfreq device by phandle. But, 'devfreq' property name is not proper
on devicetree binding because this name doesn't mean the any h/w attribute.

The devfreq core hand over the right to decide the property name
for getting the devfreq device on devicetree. Each devfreq driver
will decide the property name on devicetree binding and pass
the their own property name to devfreq_get_devfreq_by_phandle function.

Acked-by: Krzysztof Kozlowski 
Signed-off-by: Chanwoo Choi

PM / devfreq: Add devfreq_get_devfreq_by_node function

2020-09-29T08:50:09+00:00

Split off part of devfreq_get_devfreq_by_phandle into a separate
function. This allows callers to fetch devfreq instances by enumerating
devicetree instead of explicit phandles.

Acked-by: Krzysztof Kozlowski 
Reviewed-by: Lukasz Luba 
Signed-off-by: Leonard Crestez 
[cw00.choi: Export devfreq_get_devfreq_by_node function and
 add function to devfreq.h when CONFIG_PM_DEVFREQ is enabled.]
Signed-off-by: Chanwoo Choi

PM / devfreq: Add support delayed timer for polling mode

2020-07-30T08:22:57+00:00

Until now, the devfreq driver using polling mode like simple_ondemand
governor have used only deferrable timer for reducing the redundant
power consumption. It reduces the CPU wake-up from idle due to polling mode
which check the status of Non-CPU device.

But, it has a problem for Non-CPU device like DMC device with DMA operation.
Some Non-CPU device need to do monitor continuously regardless of CPU state
in order to decide the proper next status of Non-CPU device.

So, add support the delayed timer for polling mode to support
the repetitive monitoring. The devfreq driver and user can select
the kind of timer on either deferrable and delayed timer.

For example, change the timer type of DMC device
based on Exynos5422-based Odroid-XU3 as following:

- If want to use deferrable timer as following:
echo deferrable > /sys/class/devfreq/10c20000.memory-controller/timer

- If want to use delayed timer as following:
echo delayed > /sys/class/devfreq/10c20000.memory-controller/timer

Reviewed-by: Bartlomiej Zolnierkiewicz 
Reviewed-by: Lukasz Luba 
Signed-off-by: Chanwoo Choi

PM / devfreq: Get rid of some doc warnings

2020-03-24T23:35:03+00:00

Mark "void *data" as literal, in order to avoid those doc warnings:

	./include/linux/devfreq.h:156: WARNING: Inline emphasis start-string without end-string.
	./include/linux/devfreq.h:259: WARNING: Inline emphasis start-string without end-string.
	./include/linux/devfreq.h:279: WARNING: Inline emphasis start-string without end-string.

Signed-off-by: Mauro Carvalho Chehab 
Signed-off-by: Chanwoo Choi

PM / devfreq: Remove unneeded extern keyword

2020-03-24T23:35:03+00:00

Remove unneeded extern keyword from devfreq-related header file
and adjust the indentation of function parameter to keep the
consistency in header file

Reviewed-by: Lukasz Luba 
Signed-off-by: Chanwoo Choi

PM / devfreq: Fix multiple kernel-doc warnings

2019-12-30T00:59:06+00:00

Fix kernel-doc warnings in devfreq files.
Also fix a typo.

Signed-off-by: Randy Dunlap 
Signed-off-by: Chanwoo Choi

PM / devfreq: Move statistics to separate struct devfreq_stats

2019-12-30T00:59:05+00:00

Count time and transitions between devfreq frequencies in separate
struct devfreq_stats for improved code readability and maintenance.

Signed-off-by: Kamil Konieczny 
Reviewed-by: Matthias Kaehlcke 
[cw00.choi: Fix the merge conflict in trasn_stat_store
 and use 'devfreq->stats.*' style for consistent coding style
 and restore the clean-up code of 'devfreq->profile->*']
Signed-off-by: Chanwoo Choi

PM / devfreq: Change time stats to 64-bit

2019-12-30T00:59:05+00:00

Change time stats counting to bigger type by using 64-bit jiffies.
This will make devfreq stats code look similar to cpufreq stats and
prevents overflow (for HZ = 1000 after 49.7 days).

Signed-off-by: Kamil Konieczny 
Acked-by: Chanwoo Choi 
Signed-off-by: Chanwoo Choi

PM / devfreq: Use PM QoS for sysfs min/max_freq

2019-12-09T03:19:16+00:00

Switch the handling of min_freq and max_freq from sysfs to use the
dev_pm_qos_request interface.

Since PM QoS handles frequencies as kHz this change reduces the
precision of min_freq and max_freq. This shouldn't introduce problems
because frequencies which are not an integer number of kHz are likely
not an integer number of Hz either.

Try to ensure compatibility by rounding min values down and rounding
max values up.

Signed-off-by: Leonard Crestez 
Acked-by: Chanwoo Choi 
Reviewed-by: Matthias Kaehlcke 
Tested-by: Matthias Kaehlcke 
[cw00.choi: Return -EAGAIN instead of -EINVAL if dev_pm_qos is inactive]
Signed-off-by: Chanwoo Choi