lkml.org 
[lkml]   [2011]   [Feb]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Subject[PXA] A question about PXA310 cpufreq for 806Mhz
From
Date
hi,

I have a device equipped with 806Mhz PXA310 cpu.
After bootup, the system shows it is running with 624Mhz.

# cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq
624000
# cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
624000

# cat /proc/cpuinfo
Processor : XScale-V3 based processor rev 2 (v5l)
BogoMIPS : 623.00
Features : swp half thumb fastmult edsp iwmmxt
CPU implementer : 0x69
CPU architecture: 5TE
CPU variant : 0x0
CPU part : 0x689
CPU revision : 2

Hardware : Getac PS236 Handheld Platform
Revision : 0000
Serial : 0000000000000000
I fix it by below patch and it looks ok on my device.
I'm not sure if this is a proper way to fix it, I appreciate to see your comments.

It is strange that I cannot find 806Mhz PXA31x CPU
in the datasheet Section 6.1 PXA3XX Processor Differences.
But in Section 6.7, Table 55: PXA31x Core PLL, Turbo and Run Mode Output Frequencies,
I do see 806Mhz support on the table.

Regards,
Axel

diff --git a/arch/arm/mach-pxa/cpufreq-pxa3xx.c b/arch/arm/mach-pxa/cpufreq-pxa3xx.c
index 88fbec0..abf7d7a 100644
--- a/arch/arm/mach-pxa/cpufreq-pxa3xx.c
+++ b/arch/arm/mach-pxa/cpufreq-pxa3xx.c
@@ -210,15 +210,14 @@ static int pxa3xx_cpufreq_init(struct cpufreq_policy *policy)

/* set default policy and cpuinfo */
policy->cpuinfo.min_freq = 104000;
- policy->cpuinfo.max_freq = (cpu_is_pxa320()) ? 806000 : 624000;
+ policy->cpuinfo.max_freq = (cpu_is_pxa300()) ? 624000 : 806000;
policy->cpuinfo.transition_latency = 1000; /* FIXME: 1 ms, assumed */
policy->max = pxa3xx_get_clk_frequency_khz(0);
policy->cur = policy->min = policy->max;

- if (cpu_is_pxa300() || cpu_is_pxa310())
+ if (cpu_is_pxa300())
ret = setup_freqs_table(policy, ARRAY_AND_SIZE(pxa300_freqs));
-
- if (cpu_is_pxa320())
+ else if (cpu_is_pxa310() || cpu_is_pxa320())
ret = setup_freqs_table(policy, ARRAY_AND_SIZE(pxa320_freqs));

if (ret) {




\
 
 \ /
  Last update: 2011-02-10 10:23    [from the cache]
©2003-2011 Jasper Spaans