[PATCH v4 6/6] mfd: exynos-lpass: Add runtime PM support
From: m.szyprowski@samsung.com (Marek Szyprowski)
Date: 2017-03-23 08:05:30
Also in:
linux-gpio, linux-samsung-soc, lkml
Subsystem:
multifunction devices (mfd), the rest · Maintainers:
Lee Jones, Linus Torvalds
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> Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Acked-for-MFD-by: Lee Jones [off-list ref] --- 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