[PATCH v2 8/8] mfd: exynos-lpass: Add runtime PM support

Marek Szyprowski
2017-01-26T08:33:54Z

Convert exisitng lpass-suspend/resume callbacks into runtime PM callbacks.
This way Exynos LPASS driver will be ready for use with power domains
enabled. LPASS will be runtime resumed/suspended as a result of its child
devices runtime PM transitions.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
---
drivers/mfd/exynos-lpass.c | 14 +++++++++++---
1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/drivers/mfd/exynos-lpass.c b/drivers/mfd/exynos-lpass.c
index 9dbbedad916f..6d735e22acda 100644
--- a/drivers/mfd/exynos-lpass.c
+++ b/drivers/mfd/exynos-lpass.c
@@ -22,6 +22,7 @@
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/types.h>

@@ -132,6 +133,8 @@ static int exynos_lpass_probe(struct platform_device *pdev)
}

platform_set_drvdata(pdev, lpass);
+ pm_runtime_set_active(dev);
+ pm_runtime_enable(dev);
exynos_lpass_enable(lpass);

return of_platform_populate(dev->of_node, NULL, NULL, dev);
@@ -141,7 +144,9 @@ static int exynos_lpass_remove(struct platform_device *pdev)
{
struct exynos_lpass *lpass = platform_get_drvdata(pdev);

- exynos_lpass_disable(lpass);
+ pm_runtime_disable(&pdev->dev);
+ if (!pm_runtime_status_suspended(&pdev->dev))
+ exynos_lpass_disable(lpass);
regmap_exit(lpass->top);

return 0;
@@ -165,8 +170,11 @@ static int __maybe_unused exynos_lpass_resume(struct device *dev)
return 0;
}

-static SIMPLE_DEV_PM_OPS(lpass_pm_ops, exynos_lpass_suspend,
- exynos_lpass_resume);
+static const struct dev_pm_ops lpass_pm_ops = {
+ SET_RUNTIME_PM_OPS(exynos_lpass_suspend, exynos_lpass_resume, NULL)
+ SET_LATE_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+ pm_runtime_force_resume)
+};

static const struct of_device_id exynos_lpass_of_match[] = {
{ .compatible = "samsung,exynos5433-lpass" },
--
1.9.1