ARM: EXYNOS: register devices in 'need_restore' state for pm_domains

Commit ca1d72f033 ('PM / Domains: Make it possible to add devices to
inactive domains') introduced possibility to add devices to inactive
power domains and added pm_genpd_dev_need_restore() function which lets
platform core to notify power domain core that the specified device must
be restored (with its runtime_resume() callback) before first use.

This patch adds the pm_genpd_dev_need_restore() call what brings back
the suspend/resume behaviour for the client devices known from the
previous power domain driver (removed by commit 91cfbd4ee0 - 'ARM:
EXYNOS: Hook up power domains to generic power domain infrastructure').
Client device drivers relay on that suspend/resume behaviour, thus this
patch fixes runtime pm operation for client devices.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

diff --git a/arch/arm/mach-exynos/pm_domains.c b/arch/arm/mach-exynos/pm_domains.c
index 0a952a5..373c3c0 100644 (file)
--- a/arch/arm/mach-exynos/pm_domains.c
+++ b/arch/arm/mach-exynos/pm_domains.c
@@ -119,7 +119,9 @@ static __init void exynos_pm_add_dev_to_genpd(struct platform_device *pdev,
                                                struct exynos_pm_domain *pd)
 {
        if (pdev->dev.bus) {
-               if (pm_genpd_add_device(&pd->pd, &pdev->dev))
+               if (!pm_genpd_add_device(&pd->pd, &pdev->dev))
+                       pm_genpd_dev_need_restore(&pdev->dev, true);
+               else
                        pr_info("%s: error in adding %s device to %s power"
                                "domain\n", __func__, dev_name(&pdev->dev),
                                pd->name);