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| author | Tomeu Vizoso <tomeu.vizoso@collabora.com> | 2015-03-17 10:36:14 +0100 |
|---|---|---|
| committer | MyungJoo Ham <myungjoo.ham@samsung.com> | 2015-03-31 13:17:13 +0900 |
| commit | c70eea739f5e765b5d6aadf9621cbdeb024dfbd6 (patch) | |
| tree | 1393dcd85f821cb1916bf8ea35b1d08de9df1916 /drivers/devfreq | |
| parent | 11573e9132ae40239195fe5162d48caf2b7d85bb (diff) | |
| download | linux-rpi3-c70eea739f5e765b5d6aadf9621cbdeb024dfbd6.tar.gz linux-rpi3-c70eea739f5e765b5d6aadf9621cbdeb024dfbd6.tar.bz2 linux-rpi3-c70eea739f5e765b5d6aadf9621cbdeb024dfbd6.zip | |
PM / devfreq: tegra: Use clock rate constraints
Now that we have per-user clocks and the possibility to set constraints
in a clock, set a floor constraint on the EMC clock.
Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Acked-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Diffstat (limited to 'drivers/devfreq')
| -rw-r--r-- | drivers/devfreq/tegra-devfreq.c | 15 |
1 files changed, 5 insertions, 10 deletions
diff --git a/drivers/devfreq/tegra-devfreq.c b/drivers/devfreq/tegra-devfreq.c index d2f4d5ecaefd..ea6158bb76fa 100644 --- a/drivers/devfreq/tegra-devfreq.c +++ b/drivers/devfreq/tegra-devfreq.c @@ -497,10 +497,8 @@ static int tegra_devfreq_target(struct device *dev, unsigned long *freq, rate = dev_pm_opp_get_freq(opp); rcu_read_unlock(); - /* TODO: Once we have per-user clk constraints, set a floor */ - clk_set_rate(tegra->emc_clock, rate); - - /* TODO: Set voltage as well */ + clk_set_min_rate(tegra->emc_clock, rate); + clk_set_rate(tegra->emc_clock, 0); return 0; } @@ -619,7 +617,6 @@ static int tegra_devfreq_probe(struct platform_device *pdev) struct tegra_devfreq *tegra; struct tegra_devfreq_device *dev; struct resource *res; - unsigned long max_freq; unsigned int i; int irq; int err; @@ -658,6 +655,8 @@ static int tegra_devfreq_probe(struct platform_device *pdev) return err; } + clk_set_rate(tegra->emc_clock, ULONG_MAX); + tegra->rate_change_nb.notifier_call = tegra_actmon_rate_notify_cb; err = clk_notifier_register(tegra->emc_clock, &tegra->rate_change_nb); if (err) { @@ -677,11 +676,7 @@ static int tegra_devfreq_probe(struct platform_device *pdev) reset_control_deassert(tegra->reset); - max_freq = clk_round_rate(tegra->emc_clock, ULONG_MAX); - tegra->max_freq = max_freq / KHZ; - - clk_set_rate(tegra->emc_clock, max_freq); - + tegra->max_freq = clk_round_rate(tegra->emc_clock, ULONG_MAX) / KHZ; tegra->cur_freq = clk_get_rate(tegra->emc_clock) / KHZ; actmon_writel(tegra, ACTMON_SAMPLING_PERIOD - 1, |