Merge branch 'wip-2.6.34' into old-private-masterarchived-private-master

1 files changed, 41 insertions, 3 deletions

diff --git a/drivers/i2c/busses/i2c-parport.c b/drivers/i2c/busses/i2c-parport.c
index 0d8998610c74..846583ed4763 100644
--- a/drivers/i2c/busses/i2c-parport.c
+++ b/drivers/i2c/busses/i2c-parport.c
@@ -1,7 +1,7 @@
 /* ------------------------------------------------------------------------ *
  * i2c-parport.c I2C bus over parallel port                                 *
  * ------------------------------------------------------------------------ *
-   Copyright (C) 2003-2007 Jean Delvare <khali@linux-fr.org>
+   Copyright (C) 2003-2010 Jean Delvare <khali@linux-fr.org>
    
    Based on older i2c-philips-par.c driver
    Copyright (C) 1995-2000 Simon G. Vogl
@@ -27,9 +27,12 @@
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/init.h>
+#include <linux/delay.h>
 #include <linux/parport.h>
 #include <linux/i2c.h>
 #include <linux/i2c-algo-bit.h>
+#include <linux/i2c-smbus.h>
+#include <linux/slab.h>
 #include "i2c-parport.h"
 
 /* ----- Device list ------------------------------------------------------ */
@@ -38,6 +41,8 @@ struct i2c_par {
         struct pardevice *pdev;
         struct i2c_adapter adapter;
         struct i2c_algo_bit_data algo_data;
+        struct i2c_smbus_alert_setup alert_data;
+        struct i2c_client *ara;
         struct i2c_par *next;
 };
 
@@ -143,6 +148,19 @@ static struct i2c_algo_bit_data parport_algo_data = {
 
 /* ----- I2c and parallel port call-back functions and structures --------- */
 
+void i2c_parport_irq(void *data)
+{
+        struct i2c_par *adapter = data;
+        struct i2c_client *ara = adapter->ara;
+
+        if (ara) {
+                dev_dbg(&ara->dev, "SMBus alert received\n");
+                i2c_handle_smbus_alert(ara);
+        } else
+                dev_dbg(&adapter->adapter.dev,
+                        "SMBus alert received but no ARA client!\n");
+}
+
 static void i2c_parport_attach (struct parport *port)
 {
         struct i2c_par *adapter;
@@ -154,8 +172,9 @@ static void i2c_parport_attach (struct parport *port)
         }
 
         pr_debug("i2c-parport: attaching to %s\n", port->name);
+        parport_disable_irq(port);
         adapter->pdev = parport_register_device(port, "i2c-parport",
-                NULL, NULL, NULL, PARPORT_FLAG_EXCL, NULL);
+                NULL, NULL, i2c_parport_irq, PARPORT_FLAG_EXCL, adapter);
         if (!adapter->pdev) {
                 printk(KERN_ERR "i2c-parport: Unable to register with parport\n");
                 goto ERROR0;
@@ -185,14 +204,29 @@ static void i2c_parport_attach (struct parport *port)
         parport_setsda(port, 1);
         parport_setscl(port, 1);
         /* Other init if needed (power on...) */
-        if (adapter_parm[type].init.val)
+        if (adapter_parm[type].init.val) {
                 line_set(port, 1, &adapter_parm[type].init);
+                /* Give powered devices some time to settle */
+                msleep(100);
+        }
 
         if (i2c_bit_add_bus(&adapter->adapter) < 0) {
                 printk(KERN_ERR "i2c-parport: Unable to register with I2C\n");
                 goto ERROR1;
         }
 
+        /* Setup SMBus alert if supported */
+        if (adapter_parm[type].smbus_alert) {
+                adapter->alert_data.alert_edge_triggered = 1;
+                adapter->ara = i2c_setup_smbus_alert(&adapter->adapter,
+                                                     &adapter->alert_data);
+                if (adapter->ara)
+                        parport_enable_irq(port);
+                else
+                        printk(KERN_WARNING "i2c-parport: Failed to register "
+                               "ARA client\n");
+        }
+
         /* Add the new adapter to the list */
         adapter->next = adapter_list;
         adapter_list = adapter;
@@ -213,6 +247,10 @@ static void i2c_parport_detach (struct parport *port)
         for (prev = NULL, adapter = adapter_list; adapter;
              prev = adapter, adapter = adapter->next) {
                 if (adapter->pdev->port == port) {
+                        if (adapter->ara) {
+                                parport_disable_irq(port);
+                                i2c_unregister_device(adapter->ara);
+                        }
                         i2c_del_adapter(&adapter->adapter);
 
                         /* Un-init if needed (power off...) */