[PATCH] I2C-MPC: Restore code removed

I2C-MPC: Restore code removed

A previous patch to remove support for the OCP device model was way
to generious and moved some of the platform device model code, oops.

Signed-off-by: Kumar Gala <kumar.gala@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 94 insertions, 0 deletions

diff --git a/drivers/i2c/busses/i2c-mpc.c b/drivers/i2c/busses/i2c-mpc.c
index 9ad3e9262e8a..04adde62a003 100644
--- a/drivers/i2c/busses/i2c-mpc.c
+++ b/drivers/i2c/busses/i2c-mpc.c
@@ -382,6 +382,100 @@ static void __exit fsl_i2c_exit(void)
 module_init(fsl_i2c_init);
 module_exit(fsl_i2c_exit);
 
+static int fsl_i2c_probe(struct device *device)
+{
+        int result = 0;
+        struct mpc_i2c *i2c;
+        struct platform_device *pdev = to_platform_device(device);
+        struct fsl_i2c_platform_data *pdata;
+        struct resource *r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+        pdata = (struct fsl_i2c_platform_data *) pdev->dev.platform_data;
+
+        if (!(i2c = kmalloc(sizeof(*i2c), GFP_KERNEL))) {
+                return -ENOMEM;
+        }
+        memset(i2c, 0, sizeof(*i2c));
+
+        i2c->irq = platform_get_irq(pdev, 0);
+        i2c->flags = pdata->device_flags;
+        init_waitqueue_head(&i2c->queue);
+
+        i2c->base = ioremap((phys_addr_t)r->start, MPC_I2C_REGION);
+
+        if (!i2c->base) {
+                printk(KERN_ERR "i2c-mpc - failed to map controller\n");
+                result = -ENOMEM;
+                goto fail_map;
+        }
+
+        if (i2c->irq != 0)
+                if ((result = request_irq(i2c->irq, mpc_i2c_isr,
+                                          SA_SHIRQ, "i2c-mpc", i2c)) < 0) {
+                        printk(KERN_ERR
+                               "i2c-mpc - failed to attach interrupt\n");
+                        goto fail_irq;
+                }
+
+        mpc_i2c_setclock(i2c);
+        dev_set_drvdata(device, i2c);
+
+        i2c->adap = mpc_ops;
+        i2c_set_adapdata(&i2c->adap, i2c);
+        i2c->adap.dev.parent = &pdev->dev;
+        if ((result = i2c_add_adapter(&i2c->adap)) < 0) {
+                printk(KERN_ERR "i2c-mpc - failed to add adapter\n");
+                goto fail_add;
+        }
+
+        return result;
+
+      fail_add:
+        if (i2c->irq != 0)
+                free_irq(i2c->irq, NULL);
+      fail_irq:
+        iounmap(i2c->base);
+      fail_map:
+        kfree(i2c);
+        return result;
+};
+
+static int fsl_i2c_remove(struct device *device)
+{
+        struct mpc_i2c *i2c = dev_get_drvdata(device);
+
+        i2c_del_adapter(&i2c->adap);
+        dev_set_drvdata(device, NULL);
+
+        if (i2c->irq != 0)
+                free_irq(i2c->irq, i2c);
+
+        iounmap(i2c->base);
+        kfree(i2c);
+        return 0;
+};
+
+/* Structure for a device driver */
+static struct device_driver fsl_i2c_driver = {
+        .name = "fsl-i2c",
+        .bus = &platform_bus_type,
+        .probe = fsl_i2c_probe,
+        .remove = fsl_i2c_remove,
+};
+
+static int __init fsl_i2c_init(void)
+{
+        return driver_register(&fsl_i2c_driver);
+}
+
+static void __exit fsl_i2c_exit(void)
+{
+        driver_unregister(&fsl_i2c_driver);
+}
+
+module_init(fsl_i2c_init);
+module_exit(fsl_i2c_exit);
+
 MODULE_AUTHOR("Adrian Cox <adrian@humboldt.co.uk>");
 MODULE_DESCRIPTION
     ("I2C-Bus adapter for MPC107 bridge and MPC824x/85xx/52xx processors");