[PATCH] pcmcia: merge suspend into device model

Merge the suspend and resume methods for 16-bit PCMCIA cards into the
device model -- for both runtime power management and suspend to ram/disk.

Bugfix in ds.c by Richard Purdie
Signed-Off-By: Richard Purdie <rpurdie@rpsys.net>

Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>

1 files changed, 84 insertions, 10 deletions

diff --git a/drivers/pcmcia/ds.c b/drivers/pcmcia/ds.c
index a802c65c353..5223395b246 100644
--- a/drivers/pcmcia/ds.c
+++ b/drivers/pcmcia/ds.c
@@ -920,6 +920,78 @@ static struct device_attribute pcmcia_dev_attrs[] = {
         __ATTR_NULL,
 };
 
+/* PM support, also needed for reset */
+
+static int pcmcia_dev_suspend(struct device * dev, pm_message_t state)
+{
+        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
+        struct pcmcia_driver *p_drv = NULL;
+
+        if (dev->driver)
+                p_drv = to_pcmcia_drv(dev->driver);
+
+        if (p_drv && p_drv->suspend)
+                return p_drv->suspend(p_dev);
+
+        return 0;
+}
+
+
+static int pcmcia_dev_resume(struct device * dev)
+{
+        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
+        struct pcmcia_driver *p_drv = NULL;
+
+        if (dev->driver)
+                p_drv = to_pcmcia_drv(dev->driver);
+
+        if (p_drv && p_drv->resume)
+                return p_drv->resume(p_dev);
+
+        return 0;
+}
+
+
+static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
+{
+        struct pcmcia_socket *skt = _data;
+        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
+
+        if (p_dev->socket != skt)
+                return 0;
+
+        return dpm_runtime_suspend(dev, PMSG_SUSPEND);
+}
+
+static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
+{
+        struct pcmcia_socket *skt = _data;
+        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
+
+        if (p_dev->socket != skt)
+                return 0;
+
+        dpm_runtime_resume(dev);
+
+        return 0;
+}
+
+static int pcmcia_bus_resume(struct pcmcia_socket *skt)
+{
+        bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
+        return 0;
+}
+
+static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
+{
+        if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
+                             pcmcia_bus_suspend_callback)) {
+                pcmcia_bus_resume(skt);
+                return -EIO;
+        }
+        return 0;
+}
+
 
 /*======================================================================
 
@@ -951,16 +1023,6 @@ static int send_event_callback(struct device *dev, void * _data)
         if (p_dev->state & (CLIENT_UNBOUND|CLIENT_STALE))
                 return 0;
 
-        if ((data->event == CS_EVENT_PM_SUSPEND) ||
-            (data->event == CS_EVENT_RESET_PHYSICAL)) {
-                if (p_drv->suspend)
-                        return p_drv->suspend(p_dev);
-        } else if ((data->event == CS_EVENT_PM_RESUME) ||
-                   (data->event == CS_EVENT_CARD_RESET)) {
-                if (p_drv->resume)
-                        return p_drv->resume(p_dev);
-        }
-
         if (p_drv->event)
                 return p_drv->event(data->event, data->priority,
                                     &p_dev->event_callback_args);
@@ -1012,6 +1074,13 @@ static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
                 ret = send_event(skt, event, priority);
                 break;
 
+        case CS_EVENT_PM_SUSPEND:
+        case CS_EVENT_PM_RESUME:
+        case CS_EVENT_RESET_PHYSICAL:
+        case CS_EVENT_CARD_RESET:
+                handle_event(skt, event);
+                break;
+
         default:
                 handle_event(skt, event);
                 send_event(skt, event, priority);
@@ -1166,10 +1235,13 @@ int pcmcia_deregister_client(struct pcmcia_device *p_dev)
 } /* deregister_client */
 EXPORT_SYMBOL(pcmcia_deregister_client);
 
+
 static struct pcmcia_callback pcmcia_bus_callback = {
         .owner = THIS_MODULE,
         .event = ds_event,
         .requery = pcmcia_bus_rescan,
+        .suspend = pcmcia_bus_suspend,
+        .resume = pcmcia_bus_resume,
 };
 
 static int __devinit pcmcia_bus_add_socket(struct class_device *class_dev,
@@ -1238,6 +1310,8 @@ struct bus_type pcmcia_bus_type = {
         .uevent = pcmcia_bus_uevent,
         .match = pcmcia_bus_match,
         .dev_attrs = pcmcia_dev_attrs,
+        .suspend = pcmcia_dev_suspend,
+        .resume = pcmcia_dev_resume,
 };