1 files changed, 18 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/omap_device.c b/arch/arm/mach-omap2/omap_device.c
index 5cc92874be7e..f99f68e1e85b 100644
--- a/arch/arm/mach-omap2/omap_device.c
+++ b/arch/arm/mach-omap2/omap_device.c
@@ -129,6 +129,7 @@ static int omap_device_build_from_dt(struct platform_device *pdev)
         struct device_node *node = pdev->dev.of_node;
         const char *oh_name;
         int oh_cnt, i, ret = 0;
+        bool device_active = false;
 
         oh_cnt = of_property_count_strings(node, "ti,hwmods");
         if (oh_cnt <= 0) {
@@ -152,6 +153,8 @@ static int omap_device_build_from_dt(struct platform_device *pdev)
                         goto odbfd_exit1;
                 }
                 hwmods[i] = oh;
+                if (oh->flags & HWMOD_INIT_NO_IDLE)
+                        device_active = true;
         }
 
         od = omap_device_alloc(pdev, hwmods, oh_cnt);
@@ -172,6 +175,11 @@ static int omap_device_build_from_dt(struct platform_device *pdev)
 
         pdev->dev.pm_domain = &omap_device_pm_domain;
 
+        if (device_active) {
+                omap_device_enable(pdev);
+                pm_runtime_set_active(&pdev->dev);
+        }
+
 odbfd_exit1:
         kfree(hwmods);
 odbfd_exit:
@@ -842,6 +850,7 @@ static int __init omap_device_late_idle(struct device *dev, void *data)
 {
         struct platform_device *pdev = to_platform_device(dev);
         struct omap_device *od = to_omap_device(pdev);
+        int i;
 
         if (!od)
                 return 0;
@@ -850,6 +859,15 @@ static int __init omap_device_late_idle(struct device *dev, void *data)
          * If omap_device state is enabled, but has no driver bound,
          * idle it.
          */
+
+        /*
+         * Some devices (like memory controllers) are always kept
+         * enabled, and should not be idled even with no drivers.
+         */
+        for (i = 0; i < od->hwmods_cnt; i++)
+                if (od->hwmods[i]->flags & HWMOD_INIT_NO_IDLE)
+                        return 0;
+
         if (od->_driver_status != BUS_NOTIFY_BOUND_DRIVER) {
                 if (od->_state == OMAP_DEVICE_STATE_ENABLED) {
                         dev_warn(dev, "%s: enabled but no driver.  Idling\n",