ARM: exynos: Move to generic PM domain DT bindings

This patch moves Exynos PM domain code to use the new generic PM domain
look-up framework introduced in previous patches, thus also allowing
the new code to be compiled with CONFIG_ARCH_EXYNOS.

This patch was originally submitted by Tomasz Figa when he was employed
by Samsung.

Link: http://marc.info/?l=linux-pm&m=139955336002083&w=2
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Kevin Hilman <khilman@linaro.org>
Reviewed-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 1 insertions, 77 deletions

diff --git a/arch/arm/mach-exynos/pm_domains.c b/arch/arm/mach-exynos/pm_domains.c
index fd76e1b5a471..20f267121b3e 100644
--- a/arch/arm/mach-exynos/pm_domains.c
+++ b/arch/arm/mach-exynos/pm_domains.c
@@ -105,78 +105,6 @@ static int exynos_pd_power_off(struct generic_pm_domain *domain)
         return exynos_pd_power(domain, false);
 }
 
-static void exynos_add_device_to_domain(struct exynos_pm_domain *pd,
-                                         struct device *dev)
-{
-        int ret;
-
-        dev_dbg(dev, "adding to power domain %s\n", pd->pd.name);
-
-        while (1) {
-                ret = pm_genpd_add_device(&pd->pd, dev);
-                if (ret != -EAGAIN)
-                        break;
-                cond_resched();
-        }
-
-        pm_genpd_dev_need_restore(dev, true);
-}
-
-static void exynos_remove_device_from_domain(struct device *dev)
-{
-        struct generic_pm_domain *genpd = dev_to_genpd(dev);
-        int ret;
-
-        dev_dbg(dev, "removing from power domain %s\n", genpd->name);
-
-        while (1) {
-                ret = pm_genpd_remove_device(genpd, dev);
-                if (ret != -EAGAIN)
-                        break;
-                cond_resched();
-        }
-}
-
-static void exynos_read_domain_from_dt(struct device *dev)
-{
-        struct platform_device *pd_pdev;
-        struct exynos_pm_domain *pd;
-        struct device_node *node;
-
-        node = of_parse_phandle(dev->of_node, "samsung,power-domain", 0);
-        if (!node)
-                return;
-        pd_pdev = of_find_device_by_node(node);
-        if (!pd_pdev)
-                return;
-        pd = platform_get_drvdata(pd_pdev);
-        exynos_add_device_to_domain(pd, dev);
-}
-
-static int exynos_pm_notifier_call(struct notifier_block *nb,
-                                    unsigned long event, void *data)
-{
-        struct device *dev = data;
-
-        switch (event) {
-        case BUS_NOTIFY_BIND_DRIVER:
-                if (dev->of_node)
-                        exynos_read_domain_from_dt(dev);
-
-                break;
-
-        case BUS_NOTIFY_UNBOUND_DRIVER:
-                exynos_remove_device_from_domain(dev);
-
-                break;
-        }
-        return NOTIFY_DONE;
-}
-
-static struct notifier_block platform_nb = {
-        .notifier_call = exynos_pm_notifier_call,
-};
-
 static __init int exynos4_pm_init_power_domain(void)
 {
         struct platform_device *pdev;
@@ -202,7 +130,6 @@ static __init int exynos4_pm_init_power_domain(void)
                 pd->base = of_iomap(np, 0);
                 pd->pd.power_off = exynos_pd_power_off;
                 pd->pd.power_on = exynos_pd_power_on;
-                pd->pd.of_node = np;
 
                 pd->oscclk = clk_get(dev, "oscclk");
                 if (IS_ERR(pd->oscclk))
@@ -228,15 +155,12 @@ static __init int exynos4_pm_init_power_domain(void)
                         clk_put(pd->oscclk);
 
 no_clk:
-                platform_set_drvdata(pdev, pd);
-
                 on = __raw_readl(pd->base + 0x4) & INT_LOCAL_PWR_EN;
 
                 pm_genpd_init(&pd->pd, NULL, !on);
+                of_genpd_add_provider_simple(np, &pd->pd);
         }
 
-        bus_register_notifier(&platform_bus_type, &platform_nb);
-
         return 0;
 }
 arch_initcall(exynos4_pm_init_power_domain);