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Koen Kooi
4e18d70247
This patchset is managed in https://github.com/beagleboard/kernel/tree/beagleboard-3.2 by Robert Nelson and myself. Tested on beagleboard-xM/Angstrom Signed-off-by: Koen Kooi <koen@dominion.thruhere.net> Signed-off-by: Denys Dmytriyenko <denys@ti.com>
49 lines
1.8 KiB
Diff
49 lines
1.8 KiB
Diff
From 0661a55786b8ee53e388e1608eb56e4661273c6b Mon Sep 17 00:00:00 2001
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From: Colin Cross <ccross@google.com>
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Date: Mon, 6 Jun 2011 21:05:29 -0500
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Subject: [PATCH 04/11] cpufreq: OMAP: notify even with bad boot frequency
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Sometimes, bootloaders starts up with a frequency which is not
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in the OPP table. At cpu_init, policy->cur contains the frequency
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we pick at boot. It is possible that system might have fixed
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it's boot frequency later on as part of power initialization.
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After this condition, the first call to omap_target results in the
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following:
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omap_getspeed(actual device frequency) != policy->cur(frequency that
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cpufreq thinks that the system is at), and it is possible that
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freqs.old == freqs.new (because the governor requested a scale down).
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We exit without triggering the notifiers in the current code, which
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does'nt let code which depends on cpufreq_notify_transition to have
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accurate information as to what the system frequency is.
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Instead, we do a normal transition if policy->cur is wrong, then,
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freqs.old will be the actual cpu frequency, freqs.new will be the
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actual new cpu frequency and all required notifiers have the accurate
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information.
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Acked-by: Nishanth Menon <nm@ti.com>
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Signed-off-by: Colin Cross <ccross@google.com>
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Signed-off-by: Kevin Hilman <khilman@ti.com>
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---
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drivers/cpufreq/omap-cpufreq.c | 2 +-
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1 files changed, 1 insertions(+), 1 deletions(-)
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diff --git a/drivers/cpufreq/omap-cpufreq.c b/drivers/cpufreq/omap-cpufreq.c
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index 3f5a816..0a5d95c 100644
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--- a/drivers/cpufreq/omap-cpufreq.c
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+++ b/drivers/cpufreq/omap-cpufreq.c
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@@ -97,7 +97,7 @@ static int omap_target(struct cpufreq_policy *policy,
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freqs.new = clk_round_rate(mpu_clk, target_freq * 1000) / 1000;
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freqs.cpu = policy->cpu;
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- if (freqs.old == freqs.new)
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+ if (freqs.old == freqs.new && policy->cur == freqs.new)
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return ret;
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/* notifiers */
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--
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1.7.7.4
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