Re: [PATCH 2/3] cpufreq: pmac64: re-estimate G5 cpufreq transition latency
From: Viresh Kumar <viresh.kumar@linaro.org>
Date: 2013-07-24 05:34:50
Also in:
linux-pm
On 24 July 2013 01:54, Aaro Koskinen [off-list ref] wrote:
The patch also enables to use ondemand governor on the latter.
How? I can't see anything obvious here. :(
quoted hunk ↗ jump to hunk
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi> --- drivers/cpufreq/pmac64-cpufreq.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)diff --git a/drivers/cpufreq/pmac64-cpufreq.c b/drivers/cpufreq/pmac64-cpufreq.c index 674807d..f9e399b 100644 --- a/drivers/cpufreq/pmac64-cpufreq.c +++ b/drivers/cpufreq/pmac64-cpufreq.c@@ -85,7 +85,8 @@ static int (*g5_query_freq)(void); static DEFINE_MUTEX(g5_switch_mutex); -static unsigned long transition_latency; +/* A conservative estimate, based on Xserve G5 and iMac G5 (iSight). */ +static const unsigned long transition_latency = 10 * NSEC_PER_MSEC; #ifdef CONFIG_PMAC_SMU@@ -499,7 +500,6 @@ static int __init g5_neo2_cpufreq_init(struct device_node *cpus) g5_cpu_freqs[1].frequency = max_freq/2; /* Set callbacks */ - transition_latency = 12000; g5_switch_freq = g5_scom_switch_freq; g5_query_freq = g5_scom_query_freq; freq_method = "SCOM";@@ -675,7 +675,6 @@ static int __init g5_pm72_cpufreq_init(struct device_node *cpus) g5_cpu_freqs[1].frequency = min_freq; /* Set callbacks */ - transition_latency = CPUFREQ_ETERNAL; g5_switch_volt = g5_pfunc_switch_volt; g5_switch_freq = g5_pfunc_switch_freq; g5_query_freq = g5_pfunc_query_freq; --1.8.3.2