Messages in this thread Patch in this message |  | | | Subject | [PATCH] ARM: pxa: support 806MHz operating points for PXA31x processors A2 stepping | | From | Axel Lin <> | | Date | Wed, 16 Feb 2011 00:20:49 +0800 |
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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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