X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=drivers%2Fhwmon%2Fpc87427.c;h=3a8a0f7a7736dd48468ca3dfdd3cb839d046083e;hb=08a408161749d2406f94f4e3d47cfdbc826ad1cc;hp=affa21a5ccfd2372cc1abfcb52caa75ecbae62bb;hpb=ba224e2c4f0a706714ccb483b0c21d32f5994f67;p=safe%2Fjmp%2Flinux-2.6

diff --git a/drivers/hwmon/pc87427.c b/drivers/hwmon/pc87427.c
index affa21a..3a8a0f7 100644
--- a/drivers/hwmon/pc87427.c
+++ b/drivers/hwmon/pc87427.c
@@ -31,8 +31,14 @@
 #include <linux/err.h>
 #include <linux/mutex.h>
 #include <linux/sysfs.h>
+#include <linux/ioport.h>
+#include <linux/acpi.h>
 #include <asm/io.h>
 
+static unsigned short force_id;
+module_param(force_id, ushort, 0);
+MODULE_PARM_DESC(force_id, "Override the detected device ID");
+
 static struct platform_device *pdev;
 
 #define DRVNAME "pc87427"
@@ -41,7 +47,7 @@ static struct platform_device *pdev;
    device is using banked registers) and the register cache (needed to keep
    the data in the registers and the cache in sync at any time). */
 struct pc87427_data {
-	struct class_device *class_dev;
+	struct device *hwmon_dev;
 	struct mutex lock;
 	int address[2];
 	const char *name;
@@ -429,6 +435,12 @@ static int __devinit pc87427_probe(struct platform_device *pdev)
 	/* This will need to be revisited when we add support for
 	   temperature and voltage monitoring. */
 	res = platform_get_resource(pdev, IORESOURCE_IO, 0);
+	if (!request_region(res->start, res->end - res->start + 1, DRVNAME)) {
+		err = -EBUSY;
+		dev_err(&pdev->dev, "Failed to request region 0x%lx-0x%lx\n",
+			(unsigned long)res->start, (unsigned long)res->end);
+		goto exit_kfree;
+	}
 	data->address[0] = res->start;
 
 	mutex_init(&data->lock);
@@ -438,7 +450,7 @@ static int __devinit pc87427_probe(struct platform_device *pdev)
 
 	/* Register sysfs hooks */
 	if ((err = device_create_file(&pdev->dev, &dev_attr_name)))
-		goto exit_kfree;
+		goto exit_release_region;
 	for (i = 0; i < 8; i++) {
 		if (!(data->fan_enabled & (1 << i)))
 			continue;
@@ -447,9 +459,9 @@ static int __devinit pc87427_probe(struct platform_device *pdev)
 			goto exit_remove_files;
 	}
 
-	data->class_dev = hwmon_device_register(&pdev->dev);
-	if (IS_ERR(data->class_dev)) {
-		err = PTR_ERR(data->class_dev);
+	data->hwmon_dev = hwmon_device_register(&pdev->dev);
+	if (IS_ERR(data->hwmon_dev)) {
+		err = PTR_ERR(data->hwmon_dev);
 		dev_err(&pdev->dev, "Class registration failed (%d)\n", err);
 		goto exit_remove_files;
 	}
@@ -462,6 +474,8 @@ exit_remove_files:
 			continue;
 		sysfs_remove_group(&pdev->dev.kobj, &pc87427_group_fan[i]);
 	}
+exit_release_region:
+	release_region(res->start, res->end - res->start + 1);
 exit_kfree:
 	platform_set_drvdata(pdev, NULL);
 	kfree(data);
@@ -472,18 +486,22 @@ exit:
 static int __devexit pc87427_remove(struct platform_device *pdev)
 {
 	struct pc87427_data *data = platform_get_drvdata(pdev);
+	struct resource *res;
 	int i;
 
-	platform_set_drvdata(pdev, NULL);
-	hwmon_device_unregister(data->class_dev);
+	hwmon_device_unregister(data->hwmon_dev);
 	device_remove_file(&pdev->dev, &dev_attr_name);
 	for (i = 0; i < 8; i++) {
 		if (!(data->fan_enabled & (1 << i)))
 			continue;
 		sysfs_remove_group(&pdev->dev.kobj, &pc87427_group_fan[i]);
 	}
+	platform_set_drvdata(pdev, NULL);
 	kfree(data);
 
+	res = platform_get_resource(pdev, IORESOURCE_IO, 0);
+	release_region(res->start, res->end - res->start + 1);
+
 	return 0;
 }
 
@@ -507,6 +525,10 @@ static int __init pc87427_device_add(unsigned short address)
 	};
 	int err;
 
+	err = acpi_check_resource_conflict(&res);
+	if (err)
+		goto exit;
+
 	pdev = platform_device_alloc(DRVNAME, address);
 	if (!pdev) {
 		err = -ENOMEM;
@@ -542,7 +564,7 @@ static int __init pc87427_find(int sioaddr, unsigned short *address)
 	int i, err = 0;
 
 	/* Identify device */
-	val = superio_inb(sioaddr, SIOREG_DEVID);
+	val = force_id ? force_id : superio_inb(sioaddr, SIOREG_DEVID);
 	if (val != 0xf2) {	/* PC87427 */
 		err = -ENODEV;
 		goto exit;