mtd: nand: ams-delta: convert to platform driver

In its current form, the driver may interfere with different hardware on
different boards if built into the kernel, hence is not suitable for
inclusion into a defconfig, inteded to be usable with multiple OMAP1 cpu and
machine types.

Convert it to a platform driver, that should be free from this issue.

Created and tested against linux-2.6.37-rc5 on Amstrad Delta.

Signed-off-by: Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

2 files changed, 32 insertions, 5 deletions

diff --git a/arch/arm/mach-omap1/board-ams-delta.c b/arch/arm/mach-omap1/board-ams-delta.c
index 1d4163b9f0b7..81282f5e8b2d 100644
--- a/arch/arm/mach-omap1/board-ams-delta.c
+++ b/arch/arm/mach-omap1/board-ams-delta.c
@@ -181,6 +181,11 @@ static struct omap_board_config_kernel ams_delta_config[] = {
         { OMAP_TAG_LCD,         &ams_delta_lcd_config },
 };
 
+static struct platform_device ams_delta_nand_device = {
+        .name   = "ams-delta-nand",
+        .id     = -1
+};
+
 static struct resource ams_delta_kp_resources[] = {
         [0] = {
                 .start  = INT_KEYBOARD,
@@ -263,6 +268,7 @@ static struct omap1_cam_platform_data ams_delta_camera_platform_data = {
 };
 
 static struct platform_device *ams_delta_devices[] __initdata = {
+        &ams_delta_nand_device,
         &ams_delta_kp_device,
         &ams_delta_lcd_device,
         &ams_delta_led_device,
diff --git a/drivers/mtd/nand/ams-delta.c b/drivers/mtd/nand/ams-delta.c
index 2548e1065bf8..7d49f6a6b726 100644
--- a/drivers/mtd/nand/ams-delta.c
+++ b/drivers/mtd/nand/ams-delta.c
@@ -4,6 +4,7 @@
  *  Copyright (C) 2006 Jonathan McDowell <noodles@earth.li>
  *
  *  Derived from drivers/mtd/toto.c
+ *  Converted to platform driver by Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
@@ -151,7 +152,7 @@ static int ams_delta_nand_ready(struct mtd_info *mtd)
 /*
  * Main initialization routine
  */
-static int __init ams_delta_init(void)
+static int __devinit ams_delta_init(struct platform_device *pdev)
 {
         struct nand_chip *this;
         int err = 0;
@@ -219,20 +220,40 @@ static int __init ams_delta_init(void)
         return err;
 }
 
-module_init(ams_delta_init);
-
 /*
  * Clean up routine
  */
-static void __exit ams_delta_cleanup(void)
+static int __devexit ams_delta_cleanup(struct platform_device *pdev)
 {
         /* Release resources, unregister device */
         nand_release(ams_delta_mtd);
 
         /* Free the MTD device structure */
         kfree(ams_delta_mtd);
+
+        return 0;
+}
+
+static struct platform_driver ams_delta_nand_driver = {
+        .probe          = ams_delta_init,
+        .remove         = __devexit_p(ams_delta_cleanup),
+        .driver         = {
+                .name   = "ams-delta-nand",
+                .owner  = THIS_MODULE,
+        },
+};
+
+static int __init ams_delta_nand_init(void)
+{
+        return platform_driver_register(&ams_delta_nand_driver);
+}
+module_init(ams_delta_nand_init);
+
+static void __exit ams_delta_nand_exit(void)
+{
+        platform_driver_unregister(&ams_delta_nand_driver);
 }
-module_exit(ams_delta_cleanup);
+module_exit(ams_delta_nand_exit);
 
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Jonathan McDowell <noodles@earth.li>");