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driver: thermal: msm_lmh_dcvs: Match the hardware frequency to OPP

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The hardware frequency that LMH DCVSh hardware has requested may not
match an actual frequency of CPU. The OSM hardware will aggregate and
match this request to a nearest frequency mentioned in the clock plan.
The current lmh dcvs driver exposes this request without matching to
a frequency value in the OPP table.

In order to reflect the final mitigated frequency, match the mitigation
frequency request from LMH DCVSh to a nearest CPU frequency floor
in OPP table.

Change-Id: Iffc380898eac33f6c30c3808eb38d7bb499f5769
Signed-off-by: Ram Chandrasekar <rkumbako@codeaurora.org>
This commit is contained in:
Ram Chandrasekar 2016-09-06 19:25:18 -06:00
parent b8af6bb420
commit d14331f95b
1 changed files with 17 additions and 1 deletions
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18
drivers/thermal/msm_lmh_dcvs.c
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@ -107,13 +107,29 @@ static void msm_lmh_dcvs_get_max_freq(uint32_t cpu, uint32_t *max_freq)
static uint32_t msm_lmh_mitigation_notify(struct msm_lmh_dcvs_hw *hw)
{
uint32_t max_limit = 0, val = 0;
struct device *cpu_dev = NULL;
unsigned long freq_val;
val = readl_relaxed(hw->osm_hw_reg);
dcvsh_get_frequency(val, max_limit);
cpu_dev = get_cpu_device(cpumask_first(&hw->core_map));
if (!cpu_dev) {
pr_err("Error in get CPU%d device\n",
cpumask_first(&hw->core_map));
goto notify_exit;
}
freq_val = max_limit;
rcu_read_lock();
dev_pm_opp_find_freq_floor(cpu_dev, &freq_val);
rcu_read_unlock();
max_limit = freq_val;
sched_update_cpu_freq_min_max(&hw->core_map, 0, max_limit);
trace_lmh_dcvs_freq(cpumask_first(&hw->core_map), max_limit);
hw->hw_freq_limit = max_limit;
notify_exit:
hw->hw_freq_limit = max_limit;
return max_limit;
}