ieee1394: eth1394: some conditions are unlikely

[powerpc.git] / drivers / i2c / i2c-core.c

diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index 3e31f1d..21fe140 100644 (file)
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -32,6 +32,7 @@
 #include <linux/seq_file.h>
 #include <linux/platform_device.h>
 #include <linux/mutex.h>
+#include <linux/completion.h>
 #include <asm/uaccess.h>
 
 
@@ -40,49 +41,72 @@ static LIST_HEAD(drivers);
 static DEFINE_MUTEX(core_lists);
 static DEFINE_IDR(i2c_adapter_idr);
 
+
+/* ------------------------------------------------------------------------- */
+
 /* match always succeeds, as we want the probe() to tell if we really accept this match */
 static int i2c_device_match(struct device *dev, struct device_driver *drv)
 {
        return 1;
 }
 
-static int i2c_bus_suspend(struct device * dev, pm_message_t state)
+static int i2c_device_probe(struct device *dev)
 {
-       int rc = 0;
+       return -ENODEV;
+}
 
-       if (dev->driver && dev->driver->suspend)
-               rc = dev->driver->suspend(dev, state);
-       return rc;
+static int i2c_device_remove(struct device *dev)
+{
+       return 0;
 }
 
-static int i2c_bus_resume(struct device * dev)
+static void i2c_device_shutdown(struct device *dev)
 {
-       int rc = 0;
-       
-       if (dev->driver && dev->driver->resume)
-               rc = dev->driver->resume(dev);
-       return rc;
+       struct i2c_driver *driver;
+
+       if (!dev->driver)
+               return;
+       driver = to_i2c_driver(dev->driver);
+       if (driver->shutdown)
+               driver->shutdown(to_i2c_client(dev));
 }
 
-static int i2c_device_probe(struct device *dev)
+static int i2c_device_suspend(struct device * dev, pm_message_t mesg)
 {
-       return -ENODEV;
+       struct i2c_driver *driver;
+
+       if (!dev->driver)
+               return 0;
+       driver = to_i2c_driver(dev->driver);
+       if (!driver->suspend)
+               return 0;
+       return driver->suspend(to_i2c_client(dev), mesg);
 }
 
-static int i2c_device_remove(struct device *dev)
+static int i2c_device_resume(struct device * dev)
 {
-       return 0;
+       struct i2c_driver *driver;
+
+       if (!dev->driver)
+               return 0;
+       driver = to_i2c_driver(dev->driver);
+       if (!driver->resume)
+               return 0;
+       return driver->resume(to_i2c_client(dev));
 }
 
 struct bus_type i2c_bus_type = {
-       .name =         "i2c",
-       .match =        i2c_device_match,
-       .probe =        i2c_device_probe,
-       .remove =       i2c_device_remove,
-       .suspend =      i2c_bus_suspend,
-       .resume =       i2c_bus_resume,
+       .name           = "i2c",
+       .match          = i2c_device_match,
+       .probe          = i2c_device_probe,
+       .remove         = i2c_device_remove,
+       .shutdown       = i2c_device_shutdown,
+       .suspend        = i2c_device_suspend,
+       .resume         = i2c_device_resume,
 };
 
+/* ------------------------------------------------------------------------- */
+
 void i2c_adapter_dev_release(struct device *dev)
 {
        struct i2c_adapter *adap = dev_to_i2c_adapter(dev);
@@ -95,16 +119,32 @@ struct device_driver i2c_adapter_driver = {
        .bus = &i2c_bus_type,
 };
 
+/* ------------------------------------------------------------------------- */
+
+/* I2C bus adapters -- one roots each I2C or SMBUS segment */
+
 static void i2c_adapter_class_dev_release(struct class_device *dev)
 {
        struct i2c_adapter *adap = class_dev_to_i2c_adapter(dev);
        complete(&adap->class_dev_released);
 }
 
+static ssize_t i2c_adapter_show_name(struct class_device *cdev, char *buf)
+{
+       struct i2c_adapter *adap = class_dev_to_i2c_adapter(cdev);
+       return sprintf(buf, "%s\n", adap->name);
+}
+
+static struct class_device_attribute i2c_adapter_attrs[] = {
+       __ATTR(name, S_IRUGO, i2c_adapter_show_name, NULL),
+       { },
+};
+
 struct class i2c_adapter_class = {
-       .owner =        THIS_MODULE,
-       .name =         "i2c-adapter",
-       .release =      &i2c_adapter_class_dev_release,
+       .owner                  = THIS_MODULE,
+       .name                   = "i2c-adapter",
+       .class_dev_attrs        = i2c_adapter_attrs,
+       .release                = &i2c_adapter_class_dev_release,
 };
 
 static ssize_t show_adapter_name(struct device *dev, struct device_attribute *attr, char *buf)
@@ -175,8 +215,11 @@ int i2c_add_adapter(struct i2c_adapter *adap)
         * If the parent pointer is not set up,
         * we add this adapter to the host bus.
         */
-       if (adap->dev.parent == NULL)
+       if (adap->dev.parent == NULL) {
                adap->dev.parent = &platform_bus;
+               pr_debug("I2C adapter driver [%s] forgot to specify "
+                        "physical device\n", adap->name);
+       }
        sprintf(adap->dev.bus_id, "i2c-%d", adap->nr);
        adap->dev.driver = &i2c_adapter_driver;
        adap->dev.release = &i2c_adapter_dev_release;