From: Anson Huang <anson.hu...@nxp.com>
To reduce the suspend/resume latency, CPU's max supported frequency
should be used during low level suspend/resume phase, "opp-suspend"
property is NOT feasible since OPP defined in DT could be NOT supported
according to speed garding and market segment fuse settings. So we
can assign the cpufreq policy's suspend_freq with max available
frequency provided by cpufreq driver.
Signed-off-by: Anson Huang <anson.hu...@nxp.com>
---
drivers/cpufreq/imx-cpufreq-dt.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/cpufreq/imx-cpufreq-dt.c b/drivers/cpufreq/imx-cpufreq-dt.c
index 4f85f31..b6607e8 100644
--- a/drivers/cpufreq/imx-cpufreq-dt.c
+++ b/drivers/cpufreq/imx-cpufreq-dt.c
@@ -4,6 +4,7 @@
*/
#include <linux/cpu.h>
+#include <linux/cpufreq.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/kernel.h>
@@ -84,6 +85,16 @@ static int imx_cpufreq_dt_remove(struct platform_device
*pdev)
return 0;
}
+static int __init imx_cpufreq_dt_setup_suspend_opp(void)
+{
+ struct cpufreq_policy *policy = cpufreq_cpu_get(0);
+
+ policy->suspend_freq = cpufreq_quick_get_max(0);
+
+ return 0;
+}
+late_initcall(imx_cpufreq_dt_setup_suspend_opp);
+
static struct platform_driver imx_cpufreq_dt_driver = {
.probe = imx_cpufreq_dt_probe,
.remove = imx_cpufreq_dt_remove,
--
2.7.4
