watchdog: ebc-c384_wdt: Utilize the ISA bus driver

The WinSystems EBC-C384 watchdog timer is controlled via ISA bus
communication. As such, the ISA bus driver is more appropriate than the
platform driver for the WinSystems EBC-C384 watchdog timer driver.

Cc: Wim Van Sebroeck <wim@iguana.be>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2 files changed, 11 insertions, 34 deletions

diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index fb947655badd..0aefe2510e42 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -738,7 +738,7 @@ config ALIM7101_WDT
 
 config EBC_C384_WDT
         tristate "WinSystems EBC-C384 Watchdog Timer"
-        depends on X86
+        depends on X86 && ISA
         select WATCHDOG_CORE
         help
           Enables watchdog timer support for the watchdog timer on the
diff --git a/drivers/watchdog/ebc-c384_wdt.c b/drivers/watchdog/ebc-c384_wdt.c
index 77fda0b4b90e..4b849b8e37c2 100644
--- a/drivers/watchdog/ebc-c384_wdt.c
+++ b/drivers/watchdog/ebc-c384_wdt.c
@@ -16,10 +16,10 @@
 #include <linux/errno.h>
 #include <linux/io.h>
 #include <linux/ioport.h>
+#include <linux/isa.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/moduleparam.h>
-#include <linux/platform_device.h>
 #include <linux/types.h>
 #include <linux/watchdog.h>
 
@@ -95,9 +95,8 @@ static const struct watchdog_info ebc_c384_wdt_info = {
         .identity = MODULE_NAME
 };
 
-static int __init ebc_c384_wdt_probe(struct platform_device *pdev)
+static int ebc_c384_wdt_probe(struct device *dev, unsigned int id)
 {
-        struct device *dev = &pdev->dev;
         struct watchdog_device *wdd;
 
         if (!devm_request_region(dev, BASE_ADDR, ADDR_EXTENT, dev_name(dev))) {
@@ -122,61 +121,39 @@ static int __init ebc_c384_wdt_probe(struct platform_device *pdev)
                 dev_warn(dev, "Invalid timeout (%u seconds), using default (%u seconds)\n",
                         timeout, WATCHDOG_TIMEOUT);
 
-        platform_set_drvdata(pdev, wdd);
+        dev_set_drvdata(dev, wdd);
 
         return watchdog_register_device(wdd);
 }
 
-static int ebc_c384_wdt_remove(struct platform_device *pdev)
+static int ebc_c384_wdt_remove(struct device *dev, unsigned int id)
 {
-        struct watchdog_device *wdd = platform_get_drvdata(pdev);
+        struct watchdog_device *wdd = dev_get_drvdata(dev);
 
         watchdog_unregister_device(wdd);
 
         return 0;
 }
 
-static struct platform_driver ebc_c384_wdt_driver = {
+static struct isa_driver ebc_c384_wdt_driver = {
+        .probe = ebc_c384_wdt_probe,
         .driver = {
                 .name = MODULE_NAME
         },
         .remove = ebc_c384_wdt_remove
 };
 
-static struct platform_device *ebc_c384_wdt_device;
-
 static int __init ebc_c384_wdt_init(void)
 {
-        int err;
-
         if (!dmi_match(DMI_BOARD_NAME, "EBC-C384 SBC"))
                 return -ENODEV;
 
-        ebc_c384_wdt_device = platform_device_alloc(MODULE_NAME, -1);
-        if (!ebc_c384_wdt_device)
-                return -ENOMEM;
-
-        err = platform_device_add(ebc_c384_wdt_device);
-        if (err)
-                goto err_platform_device;
-
-        err = platform_driver_probe(&ebc_c384_wdt_driver, ebc_c384_wdt_probe);
-        if (err)
-                goto err_platform_driver;
-
-        return 0;
-
-err_platform_driver:
-        platform_device_del(ebc_c384_wdt_device);
-err_platform_device:
-        platform_device_put(ebc_c384_wdt_device);
-        return err;
+        return isa_register_driver(&ebc_c384_wdt_driver, 1);
 }
 
 static void __exit ebc_c384_wdt_exit(void)
 {
-        platform_device_unregister(ebc_c384_wdt_device);
-        platform_driver_unregister(&ebc_c384_wdt_driver);
+        isa_unregister_driver(&ebc_c384_wdt_driver);
 }
 
 module_init(ebc_c384_wdt_init);
@@ -185,4 +162,4 @@ module_exit(ebc_c384_wdt_exit);
 MODULE_AUTHOR("William Breathitt Gray <vilhelm.gray@gmail.com>");
 MODULE_DESCRIPTION("WinSystems EBC-C384 watchdog timer driver");
 MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("platform:" MODULE_NAME);
+MODULE_ALIAS("isa:" MODULE_NAME);