OMAP1 / PM: Use generic clock manipulation routines for runtime PM

Convert OMAP1 to using the new generic clock manipulation routines
and a device power domain for runtime PM instead of overriding the
platform bus type's runtime PM callbacks.  This allows us to simplify
OMAP1-specific code and to share some code with other platforms
(shmobile in particular).

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Kevin Hilman <khilman@ti.com>

diff --git a/arch/arm/mach-omap1/pm_bus.c b/arch/arm/mach-omap1/pm_bus.c
index 6588c22b8a64116dd11004001e2682aa14fe423e..fe31d933f0edee78106d52d0c82fb95ef70a3a58 100644 (file)
--- a/arch/arm/mach-omap1/pm_bus.c
+++ b/arch/arm/mach-omap1/pm_bus.c
@@ -24,75 +24,50 @@
 #ifdef CONFIG_PM_RUNTIME
 static int omap1_pm_runtime_suspend(struct device *dev)
 {
-       struct clk *iclk, *fclk;
-       int ret = 0;
+       int ret;
 
        dev_dbg(dev, "%s\n", __func__);
 
        ret = pm_generic_runtime_suspend(dev);
+       if (ret)
+               return ret;
 
-       fclk = clk_get(dev, "fck");
-       if (!IS_ERR(fclk)) {
-               clk_disable(fclk);
-               clk_put(fclk);
-       }
-
-       iclk = clk_get(dev, "ick");
-       if (!IS_ERR(iclk)) {
-               clk_disable(iclk);
-               clk_put(iclk);
+       ret = pm_runtime_clk_suspend(dev);
+       if (ret) {
+               pm_generic_runtime_resume(dev);
+               return ret;
        }
 
        return 0;
-};
+}
 
 static int omap1_pm_runtime_resume(struct device *dev)
 {
-       struct clk *iclk, *fclk;
-
        dev_dbg(dev, "%s\n", __func__);
 
-       iclk = clk_get(dev, "ick");
-       if (!IS_ERR(iclk)) {
-               clk_enable(iclk);
-               clk_put(iclk);
-       }
+       pm_runtime_clk_resume(dev);
+       return pm_generic_runtime_resume(dev);
+}
 
-       fclk = clk_get(dev, "fck");
-       if (!IS_ERR(fclk)) {
-               clk_enable(fclk);
-               clk_put(fclk);
-       }
+static struct dev_power_domain default_power_domain = {
+       .ops = {
+               .runtime_suspend = omap1_pm_runtime_suspend,
+               .runtime_resume = omap1_pm_runtime_resume,
+               USE_PLATFORM_PM_SLEEP_OPS
+       },
+};
 
-       return pm_generic_runtime_resume(dev);
+static struct pm_clk_notifier_block platform_bus_notifier = {
+       .pwr_domain = &default_power_domain,
+       .con_ids = { "ick", "fck", NULL, },
 };
 
 static int __init omap1_pm_runtime_init(void)
 {
-       const struct dev_pm_ops *pm;
-       struct dev_pm_ops *omap_pm;
-
        if (!cpu_class_is_omap1())
                return -ENODEV;
 
-       pm = platform_bus_get_pm_ops();
-       if (!pm) {
-               pr_err("%s: unable to get dev_pm_ops from platform_bus\n",
-                       __func__);
-               return -ENODEV;
-       }
-
-       omap_pm = kmemdup(pm, sizeof(struct dev_pm_ops), GFP_KERNEL);
-       if (!omap_pm) {
-               pr_err("%s: unable to alloc memory for new dev_pm_ops\n",
-                       __func__);
-               return -ENOMEM;
-       }
-
-       omap_pm->runtime_suspend = omap1_pm_runtime_suspend;
-       omap_pm->runtime_resume = omap1_pm_runtime_resume;
-
-       platform_bus_set_pm_ops(omap_pm);
+       pm_runtime_clk_add_notifier(&platform_bus_type, &platform_bus_notifier);
 
        return 0;
 }