X-Git-Url: http://pilppa.org/gitweb/?a=blobdiff_plain;f=drivers%2Fmacintosh%2Ftherm_windtunnel.c;h=3da0a02efd7668f6088dd28eb05f88b7c1d0b768;hb=11c2d8174ed3dc4f1971564732689b4a39129702;hp=5452da1bb1a5ab1cbf72a148fb81413f79734928;hpb=e8b495fe09bc793ae26774e7b2667f7f658d56e2;p=linux-2.6-omap-h63xx.git

diff --git a/drivers/macintosh/therm_windtunnel.c b/drivers/macintosh/therm_windtunnel.c
index 5452da1bb1a..3da0a02efd7 100644
--- a/drivers/macintosh/therm_windtunnel.c
+++ b/drivers/macintosh/therm_windtunnel.c
@@ -36,23 +36,22 @@
 #include <linux/i2c.h>
 #include <linux/slab.h>
 #include <linux/init.h>
+#include <linux/kthread.h>
+#include <linux/of_platform.h>
 
 #include <asm/prom.h>
 #include <asm/machdep.h>
 #include <asm/io.h>
 #include <asm/system.h>
 #include <asm/sections.h>
-#include <asm/of_platform.h>
 #include <asm/macio.h>
 
 #define LOG_TEMP		0			/* continously log temperature */
 
-#define I2C_DRIVERID_G4FAN	0x9001			/* fixme */
-
 static int 			do_probe( struct i2c_adapter *adapter, int addr, int kind);
 
 /* scan 0x48-0x4f (DS1775) and 0x2c-2x2f (ADM1030) */
-static unsigned short		normal_i2c[] = { 0x48, 0x49, 0x4a, 0x4b,
+static const unsigned short	normal_i2c[] = { 0x48, 0x49, 0x4a, 0x4b,
 						 0x4c, 0x4d, 0x4e, 0x4f,
 						 0x2c, 0x2d, 0x2e, 0x2f,
 						 I2C_CLIENT_END };
@@ -61,10 +60,9 @@ I2C_CLIENT_INSMOD;
 
 static struct {
 	volatile int		running;
-	struct completion	completion;
-	pid_t			poll_task;
+	struct task_struct	*poll_task;
 	
-	struct semaphore 	lock;
+	struct mutex	 	lock;
 	struct of_device	*of_dev;
 	
 	struct i2c_client	*thermostat;
@@ -223,6 +221,7 @@ static void
 setup_hardware( void )
 {
 	int val;
+	int err;
 
 	/* save registers (if we unload the module) */
 	x.r0 = read_reg( x.fan, 0x00, 1 );
@@ -265,8 +264,11 @@ setup_hardware( void )
 	x.upind = -1;
 	/* tune_fan( fan_up_table[x.upind].fan_setting ); */
 
-	device_create_file( &x.of_dev->dev, &dev_attr_cpu_temperature );
-	device_create_file( &x.of_dev->dev, &dev_attr_case_temperature );
+	err = device_create_file( &x.of_dev->dev, &dev_attr_cpu_temperature );
+	err |= device_create_file( &x.of_dev->dev, &dev_attr_case_temperature );
+	if (err)
+		printk(KERN_WARNING
+			"Failed to create temperature attribute file(s).\n");
 }
 
 static void
@@ -282,27 +284,27 @@ restore_regs( void )
 	write_reg( x.fan, 0x00, x.r0, 1 );
 }
 
-static int
-control_loop( void *dummy )
+static int control_loop(void *dummy)
 {
-	daemonize("g4fand");
-
-	down( &x.lock );
+	mutex_lock(&x.lock);
 	setup_hardware();
+	mutex_unlock(&x.lock);
 
-	while( x.running ) {
-		up( &x.lock );
-
+	for (;;) {
 		msleep_interruptible(8000);
-		
-		down( &x.lock );
+		if (kthread_should_stop())
+			break;
+
+		mutex_lock(&x.lock);
 		poll_temp();
+		mutex_unlock(&x.lock);
 	}
 
+	mutex_lock(&x.lock);
 	restore_regs();
-	up( &x.lock );
+	mutex_unlock(&x.lock);
 
-	complete_and_exit( &x.completion, 0 );
+	return 0;
 }
 
 
@@ -322,8 +324,7 @@ do_attach( struct i2c_adapter *adapter )
 		ret = i2c_probe( adapter, &addr_data, &do_probe );
 		if( x.thermostat && x.fan ) {
 			x.running = 1;
-			init_completion( &x.completion );
-			x.poll_task = kernel_thread( control_loop, NULL, SIGCHLD | CLONE_KERNEL );
+			x.poll_task = kthread_run(control_loop, NULL, "g4fand");
 		}
 	}
 	return ret;
@@ -339,7 +340,8 @@ do_detach( struct i2c_client *client )
 	else {
 		if( x.running ) {
 			x.running = 0;
-			wait_for_completion( &x.completion );
+			kthread_stop(x.poll_task);
+			x.poll_task = NULL;
 		}
 		if( client == x.thermostat )
 			x.thermostat = NULL;
@@ -357,7 +359,6 @@ static struct i2c_driver g4fan_driver = {
 	.driver = {
 		.name	= "therm_windtunnel",
 	},
-	.id		= I2C_DRIVERID_G4FAN,
 	.attach_adapter = do_attach,
 	.detach_client	= do_detach,
 };
@@ -488,7 +489,7 @@ g4fan_init( void )
 	const struct apple_thermal_info *info;
 	struct device_node *np;
 
-	init_MUTEX( &x.lock );
+	mutex_init(&x.lock);
 
 	if( !(np=of_find_node_by_name(NULL, "power-mgt")) )
 		return -ENODEV;