[MTD] sharpsl_nand: switch to driver model usage.

Start cleanup of sharpsl_nand driver. Convert it to platform driver.
Corresponding device is temprorary registered in sharpsl.c but will be
later moved to corresponding board files.

Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com>

1 files changed, 56 insertions, 7 deletions

diff --git a/drivers/mtd/nand/sharpsl.c b/drivers/mtd/nand/sharpsl.c
index 30a518e211bd..0a99188a7730 100644
--- a/drivers/mtd/nand/sharpsl.c
+++ b/drivers/mtd/nand/sharpsl.c
@@ -20,12 +20,13 @@
 #include <linux/mtd/nand_ecc.h>
 #include <linux/mtd/partitions.h>
 #include <linux/interrupt.h>
+#include <linux/platform_device.h>
+
 #include <asm/io.h>
 #include <mach/hardware.h>
 #include <asm/mach-types.h>
 
 static void __iomem *sharpsl_io_base;
-static int sharpsl_phys_base = 0x0C000000;
 
 /* register offset */
 #define ECCLPLB         sharpsl_io_base+0x00    /* line parity 7 - 0 bit */
@@ -150,10 +151,11 @@ const char *part_probes[] = { "cmdlinepart", NULL };
 /*
  * Main initialization routine
  */
-static int __init sharpsl_nand_init(void)
+static int __devinit sharpsl_nand_probe(struct platform_device *pdev)
 {
         struct nand_chip *this;
         struct mtd_partition *sharpsl_partition_info;
+        struct resource *r;
         int err = 0;
 
         /* Allocate memory for MTD device structure and private data */
@@ -163,8 +165,15 @@ static int __init sharpsl_nand_init(void)
                 return -ENOMEM;
         }
 
+        r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+        if (!r) {
+                dev_err(&pdev->dev, "no io memory resource defined!\n");
+                err = -ENODEV;
+                goto err_get_res;
+        }
+
         /* map physical address */
-        sharpsl_io_base = ioremap(sharpsl_phys_base, 0x1000);
+        sharpsl_io_base = ioremap(r->start, resource_size(r));
         if (!sharpsl_io_base) {
                 printk("ioremap to access Sharp SL NAND chip failed\n");
                 kfree(sharpsl_mtd);
@@ -242,14 +251,16 @@ static int __init sharpsl_nand_init(void)
 
         /* Return happy */
         return 0;
-}
 
-module_init(sharpsl_nand_init);
+err_get_res:
+        kfree(sharpsl_mtd);
+        return err;
+}
 
 /*
  * Clean up routine
  */
-static void __exit sharpsl_nand_cleanup(void)
+static int __devexit sharpsl_nand_remove(struct platform_device *pdev)
 {
         /* Release resources, unregister device */
         nand_release(sharpsl_mtd);
@@ -258,9 +269,47 @@ static void __exit sharpsl_nand_cleanup(void)
 
         /* Free the MTD device structure */
         kfree(sharpsl_mtd);
+
+        return 0;
+}
+
+static struct platform_driver sharpsl_nand_driver = {
+        .driver = {
+                .name   = "sharpsl-nand",
+                .owner  = THIS_MODULE,
+        },
+        .probe          = sharpsl_nand_probe,
+        .remove         = __devexit_p(sharpsl_nand_remove),
+};
+
+static struct resource sharpsl_nand_resources[] = {
+        {
+                .start  = 0x0C000000,
+                .end    = 0x0C000FFF,
+                .flags  = IORESOURCE_MEM,
+        },
+};
+
+static struct platform_device sharpsl_nand_device = {
+        .name           = "sharpsl-nand",
+        .id             = -1,
+        .resource       = sharpsl_nand_resources,
+        .num_resources  = ARRAY_SIZE(sharpsl_nand_resources),
+};
+
+static int __init sharpsl_nand_init(void)
+{
+        platform_device_register(&sharpsl_nand_device);
+        return platform_driver_register(&sharpsl_nand_driver);
 }
+module_init(sharpsl_nand_init);
 
-module_exit(sharpsl_nand_cleanup);
+static void __exit sharpsl_nand_exit(void)
+{
+        platform_driver_unregister(&sharpsl_nand_driver);
+        platform_device_unregister(&sharpsl_nand_device);
+}
+module_exit(sharpsl_nand_exit);
 
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Richard Purdie <rpurdie@rpsys.net>");