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Subject[PATCH] ARM: pxa: support 806MHz operating points for PXA31x processors A2 stepping
FromAxel Lin <>
DateWed, 16 Feb 2011 00:20:49 +0800
PXA3xx Specification Update document states that the 806MHz
operating points were added for PXA31x processors A2 stepping.

This patch adds 806MHz operating points support for PXA31x A2 stepping.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
---
I cannot find any details for PXA31x stepping B1 and B2,
thus I made this patch for PXA31x stepping A2 only.

Axel

arch/arm/mach-pxa/cpufreq-pxa3xx.c | 23 +++++++++++++++++++----
1 files changed, 19 insertions(+), 4 deletions(-)
diff --git a/arch/arm/mach-pxa/cpufreq-pxa3xx.c b/arch/arm/mach-pxa/cpufreq-pxa3xx.c
index 88fbec0..f4f0c2e 100644
--- a/arch/arm/mach-pxa/cpufreq-pxa3xx.c
+++ b/arch/arm/mach-pxa/cpufreq-pxa3xx.c
@@ -210,15 +210,30 @@ 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;
+
+ if (cpu_is_pxa300())
+ policy->cpuinfo.max_freq = 624000;
+ else if (cpu_is_pxa310())
+ policy->cpuinfo.max_freq = ((read_cpuid_id() & 0xf) == 0x2) ?
+ 806000 : 624000;
+ else if (cpu_is_pxa320())
+ policy->cpuinfo.max_freq = 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())
+ /* PXA310 A2 STEPPING supports 806Mhz operating points */
+ if ((read_cpuid_id() & 0xf) == 0x2)
+ ret = setup_freqs_table(policy,
+ ARRAY_AND_SIZE(pxa320_freqs));
+ else
+ ret = setup_freqs_table(policy,
+ ARRAY_AND_SIZE(pxa300_freqs));
+ else if (cpu_is_pxa320())
ret = setup_freqs_table(policy, ARRAY_AND_SIZE(pxa320_freqs));

if (ret) {
--
1.7.2




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