Commit Graph

10 Commits

Author SHA1 Message Date
Viresh Kumar b43a7ffbf3 cpufreq: Notify all policy->cpus in cpufreq_notify_transition()
policy->cpus contains all online cpus that have single shared clock line. And
their frequencies are always updated together.

Many SMP system's cpufreq drivers take care of this in individual drivers but
the best place for this code is in cpufreq core.

This patch modifies cpufreq_notify_transition() to notify frequency change for
all cpus in policy->cpus and hence updates all users of this API.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-04-02 15:24:00 +02:00
Axel Lin 133de12119 [CPUFREQ] s5pv210: make needlessly global symbols static
The following symbols are needlessly defined global:
  s5pv210_verify_speed
  s5pv210_getspeed

Make them static.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Dave Jones <davej@redhat.com>
2011-07-13 18:30:00 -04:00
Huisung Kang fe7f1bcbff [CPUFREQ] S5PV210: Add reboot notifier to prevent system hang
When system reboot, the CPUFREQ level should be 800MHz to prevent
system lockup.

Signed-off-by: Huisung Kang <hs1218.kang@samsung.com>
Signed-off-by: Jonghwan Choi <jhbird.choi@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Dave Jones <davej@redhat.com>
2011-07-13 18:29:59 -04:00
Todd Poynor 74df8e69e9 [CPUFREQ] S5PV210: Adjust udelay prior to voltage scaling down
Voltage scaling accesses the MAX8998 regulators over bit-banged I2C
with lots of udelays.  In the case of decreasing CPU speed, the
number of loops per us for udelay needs to be adjusted prior to
decreasing voltage to avoid delaying for up to 10X too long.

Signed-off-by: Todd Poynor <toddpoynor@google.com>
Signed-off-by: Jonghwan Choi <jhbird.choi@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Dave Jones <davej@redhat.com>
2011-07-13 18:29:58 -04:00
Arve Hjønnevåg 5b02b7794b [CPUFREQ] S5PV210: Lock a mutex while changing the cpu frequency
Without this lock the call to change the frequency for suspend could
switch to a new frequency while another thread was still changing the
cpu voltage.

Signed-off-by: Arve Hjønnevåg <arve@android.com>
Signed-off-by: Jonghwan Choi <jhbird.choi@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Dave Jones <davej@redhat.com>
2011-07-13 18:29:58 -04:00
Huisung Kang 405e6d6df7 [CPUFREQ] S5PV210: Add pm_notifier to prevent system unstable
Minimum 800MHz is needed to enter/exit suspend mode due to voltage mismatch.

Signed-off-by: Huisung Kang <hs1218.kang@samsung.com>
Signed-off-by: Jonghwan Choi <jhbird.choi@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Dave Jones <davej@redhat.com>
2011-07-13 18:29:57 -04:00
Jonghwan Choi e8b4c1986e [CPUFREQ] S5PV210: Add arm/int voltage control support
Signed-off-by: Jonghwan Choi <jhbird.choi@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Dave Jones <davej@redhat.com>
2011-07-13 18:29:56 -04:00
Huisung Kang 90d5d0a119 [CPUFREQ] S5PV210: Add additional symantics for "relation" in cpufreq with pm
Relation has an additional symantics other than standard.
s5pv310_target funtion have below additional relation.
- DISABLE_FURTHER_CPUFREQ : disable further access to target
- ENABLE_FURTHER_CPUFRER : enable access to target

Signed-off-by: Huisung Kang <hs1218.kang@samsung.com>
Signed-off-by: Jonghwan Choi <jhbird.choi@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Dave Jones <davej@redhat.com>
2011-07-13 18:29:56 -04:00
Julia Lawall 4911ca1031 [CPUFREQ] s5pv210-cpufreq.c: Add missing clk_put
The successive calls to clk_get each call clk_put in the case of failure,
but this is not done for subsequent error handling code.  The calls to
clk_get are moved to the end of the function, and appropriate gotos are
added.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@r exists@
expression e1,e2;
statement S;
@@

e1 = clk_get@p1(...);
... when != e1 = e2
    when != clk_put(e1)
    when any
if (...) { ... when != clk_put(e1)
               when != if (...) { ... clk_put(e1) ... }
* return@p3 ...;
 } else S
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Dave Jones <davej@redhat.com>
2011-07-13 18:29:54 -04:00
Kukjin Kim f7d770790f [CPUFREQ] Move ARM Samsung cpufreq drivers to drivers/cpufreq/
According to discussion of the ARM arch subsystem migration,
ARM cpufreq drivers move to drivers/cpufreq. So this patch
adds Kconfig.arm for ARM like x86 and adds Samsung S5PV210
and EXYNOS4210 cpufreq driver compile in there.
As a note, otherw will be moved.

Cc: Dave Jones <davej@redhat.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Dave Jones <davej@redhat.com>
2011-07-13 18:29:51 -04:00