Add suspend frequency support and if needed set it to
the frequency obtained from the suspend opp (can be defined
using opp-v2 bindings and is optional).
Cc: Viresh Kumar <viresh.ku...@linaro.org>
Cc: Thomas Abraham <thomas...@samsung.com>
Cc: Javier Martinez Canillas <jav...@osg.samsung.com>
Cc: Krzysztof Kozlowski <k.kozlow...@samsung.com>
Cc: Marek Szyprowski <m.szyprow...@samsung.com>
Cc: Tobias Jakobi <tjak...@math.uni-bielefeld.de>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnier...@samsung.com>
---
drivers/cpufreq/cpufreq-dt.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/cpufreq/cpufreq-dt.c b/drivers/cpufreq/cpufreq-dt.c
index c3583cd..e08ae40 100644
--- a/drivers/cpufreq/cpufreq-dt.c
+++ b/drivers/cpufreq/cpufreq-dt.c
@@ -196,6 +196,7 @@ static int cpufreq_init(struct cpufreq_policy *policy)
struct device *cpu_dev;
struct regulator *cpu_reg;
struct clk *cpu_clk;
+ struct dev_pm_opp *suspend_opp;
unsigned long min_uV = ~0, max_uV = 0;
unsigned int transition_latency;
bool need_update = false;
@@ -329,6 +330,13 @@ static int cpufreq_init(struct cpufreq_policy *policy)
policy->driver_data = priv;
policy->clk = cpu_clk;
+
+ rcu_read_lock();
+ suspend_opp = dev_pm_opp_get_suspend_opp(cpu_dev);
+ if (suspend_opp)
+ policy->suspend_freq = dev_pm_opp_get_freq(suspend_opp) / 1000;
+ rcu_read_unlock();
+
ret = cpufreq_table_validate_and_show(policy, freq_table);
if (ret) {
dev_err(cpu_dev, "%s: invalid frequency table: %d\n", __func__,
@@ -419,6 +427,9 @@ static struct cpufreq_driver dt_cpufreq_driver = {
.ready = cpufreq_ready,
.name = "cpufreq-dt",
.attr = cpufreq_dt_attr,
+#ifdef CONFIG_PM
+ .suspend = cpufreq_generic_suspend,
+#endif
};
static int dt_cpufreq_probe(struct platform_device *pdev)
--
1.9.1
--
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