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authorViresh Kumar <viresh.kumar@linaro.org>2019-02-12 10:06:47 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2019-02-13 01:48:45 +0300
commit263abfe74b5f1058887b14e7668b0d737e040e42 (patch)
tree58c4a95ac56cf963091bc30fae7e1a56eb924843 /drivers/cpufreq
parent91a12e91dc39137906d929a4ff6f9c32c59697fa (diff)
downloadlinux-263abfe74b5f1058887b14e7668b0d737e040e42.tar.xz
cpufreq: dt: Implement online/offline() callbacks
Implement the light-weight tear down and bring up helpers to reduce the amount of work to do on CPU offline/online operation. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpufreq')
-rw-r--r--drivers/cpufreq/cpufreq-dt.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/cpufreq/cpufreq-dt.c b/drivers/cpufreq/cpufreq-dt.c
index 7ba392911cd0..1aefaa1b0ca2 100644
--- a/drivers/cpufreq/cpufreq-dt.c
+++ b/drivers/cpufreq/cpufreq-dt.c
@@ -295,6 +295,21 @@ out_put_clk:
return ret;
}
+static int cpufreq_online(struct cpufreq_policy *policy)
+{
+ /* We did light-weight tear down earlier, nothing to do here */
+ return 0;
+}
+
+static int cpufreq_offline(struct cpufreq_policy *policy)
+{
+ /*
+ * Preserve policy->driver_data and don't free resources on light-weight
+ * tear down.
+ */
+ return 0;
+}
+
static int cpufreq_exit(struct cpufreq_policy *policy)
{
struct private_data *priv = policy->driver_data;
@@ -319,6 +334,8 @@ static struct cpufreq_driver dt_cpufreq_driver = {
.get = cpufreq_generic_get,
.init = cpufreq_init,
.exit = cpufreq_exit,
+ .online = cpufreq_online,
+ .offline = cpufreq_offline,
.name = "cpufreq-dt",
.attr = cpufreq_dt_attr,
.suspend = cpufreq_generic_suspend,