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From 272d76bcb22b9509ccc1b59d3a62e3930d902d17 Mon Sep 17 00:00:00 2001
From: Nishanth Menon <nm@ti.com>
Date: Fri, 13 May 2011 05:43:49 -0700
Subject: [PATCH 5/6] OMAP2+: cpufreq: use cpufreq_frequency_table_target
Use cpufreq_frequency_table_target for finding the proper target
instead of seeing if the frequency requested is divisible alone.
if we have a frequency table, we should restrict ourselves to
selecting the "approved" frequencies alone and only in the case
where the frequency table is not available should we attempt at
closest roundable clock frequency.
Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
---
arch/arm/mach-omap2/omap2plus-cpufreq.c | 38 ++++++++++++++++++++++--------
1 files changed, 28 insertions(+), 10 deletions(-)
diff --git a/arch/arm/mach-omap2/omap2plus-cpufreq.c b/arch/arm/mach-omap2/omap2plus-cpufreq.c
index 854f4b3..d0b4f97 100644
--- a/arch/arm/mach-omap2/omap2plus-cpufreq.c
+++ b/arch/arm/mach-omap2/omap2plus-cpufreq.c
@@ -77,24 +77,42 @@ static int omap_target(struct cpufreq_policy *policy,
unsigned int target_freq,
unsigned int relation)
{
- int i, ret = 0;
+ unsigned int i;
+ int ret = 0;
struct cpufreq_freqs freqs;
/* Changes not allowed until all CPUs are online */
if (is_smp() && (num_online_cpus() < NR_CPUS))
return ret;
- /*
- * Ensure desired rate is within allowed range. Some govenors
- * (ondemand) will just pass target_freq=0 to get the minimum.
- */
- if (target_freq < policy->min)
- target_freq = policy->min;
- if (target_freq > policy->max)
- target_freq = policy->max;
+ if (freq_table) {
+ ret = cpufreq_frequency_table_target(policy, freq_table,
+ target_freq, relation, &i);
+ if (ret) {
+ pr_debug("%s: cpu%d: no freq match for %d(ret=%d)\n",
+ __func__, policy->cpu, target_freq, ret);
+ return ret;
+ }
+ freqs.new = freq_table[i].frequency;
+ } else {
+ /*
+ * Ensure desired rate is within allowed range. Some govenors
+ * (ondemand) will just pass target_freq=0 to get the minimum.
+ */
+ if (target_freq < policy->min)
+ target_freq = policy->min;
+ if (target_freq > policy->max)
+ target_freq = policy->max;
+
+ freqs.new = clk_round_rate(mpu_clk, target_freq * 1000) / 1000;
+ }
+ if (!freqs.new) {
+ pr_err("%s: cpu%d: no match for freq %d\n", __func__,
+ policy->cpu, target_freq);
+ return -EINVAL;
+ }
freqs.old = omap_getspeed(policy->cpu);
- freqs.new = clk_round_rate(mpu_clk, target_freq * 1000) / 1000;
freqs.cpu = policy->cpu;
if (freqs.old == freqs.new)
--
1.6.6.1
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