[PATCHv2 6/6] thermal: exynos: Add runtime power management for tmu

[Anand Moon <linux.amoon@gmail.com>]

Add runtime power management for exynos thermal driver.

Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: Anand Moon <linux.amoon@gmail.com>
---
v1: new patch in this series.
---
 drivers/thermal/samsung/exynos_tmu.c | 29 ++++++++++++++++++++++++++--
 1 file changed, 27 insertions(+), 2 deletions(-)

diff --git a/drivers/thermal/samsung/exynos_tmu.c b/drivers/thermal/samsung/exynos_tmu.c
index f8a527f19383..be9b98caf2ba 100644
--- a/drivers/thermal/samsung/exynos_tmu.c
+++ b/drivers/thermal/samsung/exynos_tmu.c
@@ -20,6 +20,7 @@
 #include <linux/of_irq.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/consumer.h>
+#include <linux/pm_runtime.h>
 
 #include <dt-bindings/thermal/thermal_exynos.h>
 
@@ -1106,6 +1107,15 @@ static int exynos_tmu_probe(struct platform_device *pdev)
 		goto err_thermal;
 	}
 
+	pm_runtime_set_active(&pdev->dev);
+	pm_runtime_set_autosuspend_delay(&pdev->dev, 1000);
+	pm_runtime_use_autosuspend(&pdev->dev);
+	pm_runtime_enable(&pdev->dev);
+
+	ret = pm_runtime_resume_and_get(&pdev->dev);
+	if (ret < 0)
+		goto disable_runtime_pm;
+
 	ret = devm_request_irq(&pdev->dev, data->irq, exynos_tmu_irq,
 		IRQF_TRIGGER_RISING | IRQF_SHARED, dev_name(&pdev->dev), data);
 	if (ret) {
@@ -1113,11 +1123,16 @@ static int exynos_tmu_probe(struct platform_device *pdev)
 		goto err_thermal;
 	}
 
+	pm_runtime_put(&pdev->dev);
+
 	exynos_tmu_control(pdev, true);
 	return 0;
 
 err_thermal:
 	thermal_zone_of_sensor_unregister(&pdev->dev, data->tzd);
+disable_runtime_pm:
+	pm_runtime_put_noidle(&pdev->dev);
+	pm_runtime_disable(&pdev->dev);
 err_clk_sec:
 	clk_disable_unprepare(data->clk_sec);
 err_sclk:
@@ -1143,6 +1158,9 @@ static int exynos_tmu_remove(struct platform_device *pdev)
 	clk_disable_unprepare(data->clk);
 	clk_disable_unprepare(data->clk_sec);
 
+	pm_runtime_put_noidle(&pdev->dev);
+	pm_runtime_disable(&pdev->dev);
+
 	if (!IS_ERR(data->regulator))
 		regulator_disable(data->regulator);
 
@@ -1151,18 +1169,25 @@ static int exynos_tmu_remove(struct platform_device *pdev)
 
 static int __maybe_unused exynos_tmu_suspend(struct device *dev)
 {
-	exynos_tmu_control(to_platform_device(dev), false);
+	struct platform_device *pdev = to_platform_device(dev);
 
-	return 0;
+	exynos_tmu_control(pdev, false);
+
+	return pm_runtime_force_suspend(&pdev->dev);
 }
 
 static int __maybe_unused exynos_tmu_resume(struct device *dev)
 {
 	struct platform_device *pdev = to_platform_device(dev);
+	int ret;
 
 	exynos_tmu_initialize(pdev);
 	exynos_tmu_control(pdev, true);
 
+	ret = pm_runtime_force_resume(&pdev->dev);
+	if (ret)
+		return ret;
+
 	return 0;
 }
 
-- 
2.36.1