linux.git/drivers/clk/mvebu/clk-cpu.c, branch v4.4.117

clk: mvebu: Use of_clk_get_parent_name()

2015-10-16T23:35:43+00:00

This reverts commit e79b202c632f24f49f2eb9459b88b5fd9e332263.

Now that we use of_clk_get() inside of_clk_get_parent_name() we
can safely use it here.

Signed-off-by: Stephen Boyd

Partially revert "clk: mvebu: Convert to clk_hw based provider APIs"

2015-10-14T18:28:17+00:00

This partially reverts commit eca61c9ff2588e1df373e61078e1874976315839.

Thomas reports that it causes regressions on Armada XP devices.
This is because of_clk_get_parent_name() relies on the property
'clock-output-names' to resolve the name of a clock's parent,
without trying to get the clock from the framework and call
__clk_get_name(). Given that Armada XP devices don't have the
'clock-output-names' property, of_clk_get_parent_name() returns
the name of the node which doesn't match the actual parent
clock's name at all, causing CPU clocks to never link up with
their parents.

Reported-by: Thomas Petazzoni 
Signed-off-by: Stephen Boyd

clk: mvebu: Convert to clk_hw based provider APIs

2015-08-24T23:48:50+00:00

We're removing struct clk from the clk provider API, so switch
this code to using the clk_hw based provider APIs. This also
removes a clk_get() in this driver that can just as easily use
of_clk_get_parent_name() instead.

Cc: Gregory CLEMENT 
Cc: Thomas Petazzoni 
Signed-off-by: Stephen Boyd

clk: mvebu: Remove clk.h include

2015-07-20T18:10:40+00:00

Clock provider drivers generally shouldn't include clk.h because
it's the consumer API. Only include the header if necessary. The
clkdev.h include isn't used here either, so drop it and add in
slab.h to keep things compiling.

Cc: Boris Brezillon 
Cc: Thomas Petazzoni 
Cc: Gregory CLEMENT 
Cc: Jason Cooper 
Cc: Sebastian Hesselbarth 
Cc: Andrew Lunn 
Signed-off-by: Stephen Boyd

clk: mvebu: extend clk-cpu for dynamic frequency scaling

2014-07-16T12:58:38+00:00

This commit extends the existing clk-cpu driver used on Marvell Armada
XP platforms to support the dynamic frequency scaling of the CPU
clock. Non-dynamic frequency change was already supported (and used
before secondary CPUs are started), but the dynamic frequency change
requires a completely different procedure.

In order to achieve this, the clk_cpu_set_rate() function is reworked
to handle two separate cases:

 - The case where the clock is enabled, which is the new dynamic
   frequency change code, implemented in clk_cpu_on_set_rate(). This
   part will be used for cpufreq activities.

 - The case where the clock is disabled, which is the existing
   frequency change code, moved in clk_cpu_off_set_rate(). This part
   is already used to set the clock frequency of the secondary CPUs
   before starting them.

In order to implement the dynamic frequency change function, we need
to access the PMU DFS registers, which are outside the currently
mapped "Clock Complex" registers, so a new area of registers is now
mapped. This affects the Device Tree binding, but we are careful to do
it in a backward-compatible way (by allowing the second pair of
registers to be non-existent, and in this case, ensuring
clk_cpu_on_set_rate() returns an error).

Note that technically speaking, the clk_cpu_on_set_rate() does not do
the entire procedure needed to change the frequency dynamically, as it
involves touching a number of PMSU registers. This is done through a
clock notifier registered by the PMSU driver in followup commits.

Cc: 
Signed-off-by: Thomas Petazzoni 
Link: https://lkml.kernel.org/r/1404920715-19834-4-git-send-email-thomas.petazzoni@free-electrons.com
Signed-off-by: Jason Cooper

clk: mvebu: Staticize of_cpu_clk_setup

2013-12-20T01:47:32+00:00

'of_cpu_clk_setup' is used only in this file. Make it static.

Signed-off-by: Sachin Kamat 
Acked-by: Gregory CLEMENT 
Signed-off-by: Mike Turquette

clk: mvebu: add missing iounmap

2013-08-23T18:44:03+00:00

Add missing iounmap to setup error path.

Signed-off-by: Jisheng Zhang 
Signed-off-by: Mike Turquette

clk: mvebu: Use common of_clk_init() function

2013-04-03T19:55:31+00:00

The use common of_clk_init() function simplifies the clock initialization
and adds handling of the DT "fixed-clock".

Signed-off-by: Jean-Francois Moine 
Signed-off-by: Mike Turquette 
[mturquette@linaro.org: fixed $SUBJECT to reflect correct file path]

clk: mvebu/clk-cpu.c: fix memory leakage

2013-01-23T01:06:52+00:00

the variable cpuclk and clk_name should be properly freed when error happens.

Signed-off-by: Cong Ding 
Acked-by: Jason Cooper 
Acked-by: Gregory CLEMENT 
Acked-by: Mike Turquette 
Signed-off-by: Jason Cooper

clk: mvebu: add armada-370-xp CPU specific clocks

2012-11-20T13:35:42+00:00

Add Armada 370/XP specific CPU clocks

Signed-off-by: Gregory CLEMENT 
Signed-off-by: Thomas Petazzoni 
Tested-by: Gregory CLEMENT