linux-toradex.git/arch/arm/kernel/topology.c, branch v4.14-rc4

ARM: Convert to using %pOF instead of full_name

2017-08-16T20:25:30+00:00

Now that we have a custom printf format specifier, convert users of
full_name to use %pOF instead. This is preparation to remove storing
of the full path string for each node.

Signed-off-by: Rob Herring 
Acked-by: Krzysztof Kozlowski 
Acked-by: Heiko Stuebner 
Reviewed-by: Geert Uytterhoeven 
Acked-by: Gregory CLEMENT 
Acked-by: Shawn Guo 
Acked-by: Simon Horman 
Cc: Russell King 
Cc: Kukjin Kim 
Cc: Javier Martinez Canillas 
Cc: Fabio Estevam 
Cc: Jason Cooper 
Cc: Andrew Lunn 
Cc: Sebastian Hesselbarth 
Cc: Tony Lindgren 
Cc: "Benoît Cousson" 
Cc: Paul Walmsley 
Cc: Magnus Damm 
Signed-off-by: Arnd Bergmann

arm,arm64,drivers: add a prefix to drivers arch_topology interfaces

2017-06-03T10:10:09+00:00

Now that some functions that deal with arch topology information live
under drivers, there is a clash of naming that might create confusion.

Tidy things up by creating a topology namespace for interfaces used by
arch code; achieve this by prepending a 'topology_' prefix to driver
interfaces.

Signed-off-by: Juri Lelli 
Acked-by: Russell King 
Acked-by: Catalin Marinas 
Signed-off-by: Greg Kroah-Hartman

arm,arm64,drivers: move externs in a new header file

2017-06-03T10:10:09+00:00

Create a new header file (include/linux/arch_topology.h) and put there
declarations of interfaces used by arm, arm64 and drivers code.

Signed-off-by: Juri Lelli 
Acked-by: Russell King 
Acked-by: Catalin Marinas 
Acked-by: Greg Kroah-Hartman 
Signed-off-by: Greg Kroah-Hartman

arm,arm64,drivers: reduce scope of cap_parsing_failed

2017-06-03T10:10:09+00:00

Reduce the scope of cap_parsing_failed (making it static in
drivers/base/arch_topology.c) by slightly changing {arm,arm64} DT
parsing code.

For arm checking for !cap_parsing_failed before calling normalize_
cpu_capacity() is superfluous, as returning an error from parse_
cpu_capacity() (above) means cap_from _dt is set to false.

For arm64 we can simply check if raw_capacity points to something,
which is not if capacity parsing has failed.

Suggested-by: Morten Rasmussen 
Signed-off-by: Juri Lelli 
Acked-by: Russell King 
Acked-by: Catalin Marinas 
Acked-by: Greg Kroah-Hartman 
Signed-off-by: Greg Kroah-Hartman

arm, arm64: factorize common cpu capacity default code

2017-06-03T10:10:09+00:00

arm and arm64 share lot of code relative to parsing CPU capacity
information from DT, using that information for appropriate scaling and
exposing a sysfs interface for chaging such values at runtime.

Factorize such code in a common place (driver/base/arch_topology.c) in
preparation for further additions.

Suggested-by: Will Deacon 
Suggested-by: Mark Rutland 
Suggested-by: Catalin Marinas 
Cc: Russell King 
Cc: Catalin Marinas 
Cc: Will Deacon 
Cc: Greg Kroah-Hartman 
Signed-off-by: Juri Lelli 
Acked-by: Russell King 
Acked-by: Catalin Marinas 
Acked-by: Greg Kroah-Hartman 
Signed-off-by: Greg Kroah-Hartman

arm: remove wrong CONFIG_PROC_SYSCTL ifdef

2017-06-03T10:10:08+00:00

The sysfs cpu_capacity entry for each CPU has nothing to do with
PROC_FS, nor it's in /proc/sys path.

Remove such ifdef.

Cc: Russell King 
Reported-and-suggested-by: Sudeep Holla 
Fixes: 7e5930aaef5d ('ARM: 8622/3: add sysfs cpu_capacity attribute')
Signed-off-by: Juri Lelli 
Acked-by: Russell King 
Signed-off-by: Greg Kroah-Hartman

arm: fix return value of parse_cpu_capacity

2017-06-03T10:10:08+00:00

parse_cpu_capacity() has to return 0 on failure, but it currently returns
1 instead if raw_capacity kcalloc failed.

Fix it (by directly returning 0).

Reported-by: Morten Rasmussen 
Fixes: 06073ee26775 ('ARM: 8621/3: parse cpu capacity-dmips-mhz from DT')
Signed-off-by: Juri Lelli 
Acked-by: Russell King 
Acked-by: Vincent Guittot 
Signed-off-by: Greg Kroah-Hartman

sched/headers: Prepare for new header dependencies before moving code to

2017-03-02T07:42:26+00:00

We are going to split  out of , which
will have to be picked up from other headers and a couple of .c files.

Create a trivial placeholder  file that just
maps to  to make this patch obviously correct and
bisectable.

Include the new header in the files that are going to need it.

Acked-by: Linus Torvalds 
Cc: Mike Galbraith 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar

ARM: 8622/3: add sysfs cpu_capacity attribute

2016-11-22T11:45:08+00:00

Add a sysfs cpu_capacity attribute with which it is possible to read and
write (thus over-writing default values) CPUs capacity. This might be
useful in situations where values needs changing after boot.

The new attribute shows up as:

 /sys/devices/system/cpu/cpu*/cpu_capacity

Signed-off-by: Juri Lelli 
Signed-off-by: Russell King

ARM: 8621/3: parse cpu capacity-dmips-mhz from DT

2016-11-22T11:45:06+00:00

With the introduction of cpu capacity-dmips-mhz bindings, CPU capacities
can now be calculated from values extracted from DT and information
coming from cpufreq. Add parsing of DT information at boot time, and
complement it with cpufreq information. We keep code that can produce
same information, based on different DT properties and hard-coded
values, as fall-back for backward compatibility.

Caveat: the information provided by this patch will start to be used in
the future. We need to #define arch_scale_cpu_capacity to something
provided in arch, so that scheduler's default implementation (which gets
used if arch_scale_cpu_capacity is not defined) is overwritten.

Signed-off-by: Juri Lelli 
Acked-by: Vincent Guittot 
Signed-off-by: Russell King