diff mbox series

[v4,4/4] cpufreq: qcom-hw: provide online/offline operations

Message ID 20220326155153.7377-5-dmitry.baryshkov@linaro.org
State Accepted
Commit a1eb080a04477a55c66d70fb3401b059d6dcc3a9
Headers show
Series cpufreq: qcom-hw: Fixes for cpu hotplug support | expand

Commit Message

Dmitry Baryshkov March 26, 2022, 3:51 p.m. UTC 
Provide lightweight online and offline operations. This saves us from
parsing and tearing down the OPP tables each time the CPU is put online
or offline.

Tested-by: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>
Reviewed-by: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/cpufreq/qcom-cpufreq-hw.c | 28 ++++++++++++++++++++++++++--
 1 file changed, 26 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/drivers/cpufreq/qcom-cpufreq-hw.c b/drivers/cpufreq/qcom-cpufreq-hw.c
index db67daed99a3..b0282898168e 100644
--- a/drivers/cpufreq/qcom-cpufreq-hw.c
+++ b/drivers/cpufreq/qcom-cpufreq-hw.c
@@ -423,10 +423,26 @@  static int qcom_cpufreq_hw_lmh_init(struct cpufreq_policy *policy, int index)
 	return 0;
 }
 
-static void qcom_cpufreq_hw_lmh_exit(struct qcom_cpufreq_data *data)
+static int qcom_cpufreq_hw_cpu_online(struct cpufreq_policy *policy)
 {
+	struct qcom_cpufreq_data *data = policy->driver_data;
+	struct platform_device *pdev = cpufreq_get_driver_data();
+	int ret;
+
+	ret = irq_set_affinity_hint(data->throttle_irq, policy->cpus);
+	if (ret)
+		dev_err(&pdev->dev, "Failed to set CPU affinity of %s[%d]\n",
+			data->irq_name, data->throttle_irq);
+
+	return ret;
+}
+
+static int qcom_cpufreq_hw_cpu_offline(struct cpufreq_policy *policy)
+{
+	struct qcom_cpufreq_data *data = policy->driver_data;
+
 	if (data->throttle_irq <= 0)
-		return;
+		return 0;
 
 	mutex_lock(&data->throttle_lock);
 	data->cancel_throttle = true;
@@ -434,6 +450,12 @@  static void qcom_cpufreq_hw_lmh_exit(struct qcom_cpufreq_data *data)
 
 	cancel_delayed_work_sync(&data->throttle_work);
 	irq_set_affinity_hint(data->throttle_irq, NULL);
+
+	return 0;
+}
+
+static void qcom_cpufreq_hw_lmh_exit(struct qcom_cpufreq_data *data)
+{
 	free_irq(data->throttle_irq, data);
 }
 
@@ -590,6 +612,8 @@  static struct cpufreq_driver cpufreq_qcom_hw_driver = {
 	.get		= qcom_cpufreq_hw_get,
 	.init		= qcom_cpufreq_hw_cpu_init,
 	.exit		= qcom_cpufreq_hw_cpu_exit,
+	.online		= qcom_cpufreq_hw_cpu_online,
+	.offline	= qcom_cpufreq_hw_cpu_offline,
 	.register_em	= cpufreq_register_em_with_opp,
 	.fast_switch    = qcom_cpufreq_hw_fast_switch,
 	.name		= "qcom-cpufreq-hw",