diff options
| author | Todd Poynor <toddpoynor@google.com> | 2011-06-24 16:04:17 +0900 |
|---|---|---|
| committer | Dave Jones <davej@redhat.com> | 2011-07-13 18:29:58 -0400 |
| commit | 74df8e69e901e624fe0b439f914aa7be66201154 (patch) | |
| tree | 5fd252e9207c3bc9483f9bf85679919c2ecfc892 /drivers/cpufreq/s5pv210-cpufreq.c | |
| parent | 5b02b7794b555e299c5e9298c6b223b538888ec8 (diff) | |
| download | lwn-74df8e69e901e624fe0b439f914aa7be66201154.tar.gz lwn-74df8e69e901e624fe0b439f914aa7be66201154.zip | |
[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>
Diffstat (limited to 'drivers/cpufreq/s5pv210-cpufreq.c')
| -rw-r--r-- | drivers/cpufreq/s5pv210-cpufreq.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/cpufreq/s5pv210-cpufreq.c b/drivers/cpufreq/s5pv210-cpufreq.c index 7fba356d2729..155242cfc714 100644 --- a/drivers/cpufreq/s5pv210-cpufreq.c +++ b/drivers/cpufreq/s5pv210-cpufreq.c @@ -467,6 +467,8 @@ static int s5pv210_target(struct cpufreq_policy *policy, } } + cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE); + if (freqs.new < freqs.old) { regulator_set_voltage(int_regulator, int_volt, int_volt_max); @@ -475,8 +477,6 @@ static int s5pv210_target(struct cpufreq_policy *policy, arm_volt, arm_volt_max); } - cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE); - printk(KERN_DEBUG "Perf changed[L%d]\n", index); exit: |