i2c: convert i2c-isch to platform_device

Convert i2c-isch to platform_device for the lpc mfd core to add it at probe
time.

Signed-off-by: Denis Turischev <denis@compulab.co.il>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

2 files changed, 28 insertions, 42 deletions

diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
index 4cc3807bd31c..f22eff1da87e 100644
--- a/drivers/i2c/busses/Kconfig
+++ b/drivers/i2c/busses/Kconfig
@@ -105,7 +105,7 @@ config I2C_I801
 
 config I2C_ISCH
         tristate "Intel SCH SMBus 1.0"
-        depends on PCI
+        select LPC_SCH
         help
           Say Y here if you want to use SMBus controller on the Intel SCH
           based systems.
diff --git a/drivers/i2c/busses/i2c-isch.c b/drivers/i2c/busses/i2c-isch.c
index 69c22f79f231..ddc258edb34f 100644
--- a/drivers/i2c/busses/i2c-isch.c
+++ b/drivers/i2c/busses/i2c-isch.c
@@ -27,7 +27,7 @@
 */
 
 #include <linux/module.h>
-#include <linux/pci.h>
+#include <linux/platform_device.h>
 #include <linux/kernel.h>
 #include <linux/delay.h>
 #include <linux/stddef.h>
@@ -46,12 +46,6 @@
 #define SMBHSTDAT1      (7 + sch_smba)
 #define SMBBLKDAT       (0x20 + sch_smba)
 
-/* count for request_region */
-#define SMBIOSIZE       64
-
-/* PCI Address Constants */
-#define SMBBA_SCH       0x40
-
 /* Other settings */
 #define MAX_TIMEOUT     500
 
@@ -63,7 +57,6 @@
 #define SCH_BLOCK_DATA          0x05
 
 static unsigned short sch_smba;
-static struct pci_driver sch_driver;
 static struct i2c_adapter sch_adapter;
 
 /*
@@ -256,37 +249,23 @@ static struct i2c_adapter sch_adapter = {
         .algo           = &smbus_algorithm,
 };
 
-static const struct pci_device_id sch_ids[] = {
-        { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SCH_LPC) },
-        { 0, }
-};
-
-MODULE_DEVICE_TABLE(pci, sch_ids);
-
-static int __devinit sch_probe(struct pci_dev *dev,
-                                const struct pci_device_id *id)
+static int __devinit smbus_sch_probe(struct platform_device *dev)
 {
+        struct resource *res;
         int retval;
-        unsigned int smba;
 
-        pci_read_config_dword(dev, SMBBA_SCH, &smba);
-        if (!(smba & (1 << 31))) {
-                dev_err(&dev->dev, "SMBus I/O space disabled!\n");
-                return -ENODEV;
-        }
+        res = platform_get_resource(dev, IORESOURCE_IO, 0);
+        if (!res)
+                return -EBUSY;
 
-        sch_smba = (unsigned short)smba;
-        if (sch_smba == 0) {
-                dev_err(&dev->dev, "SMBus base address uninitialized!\n");
-                return -ENODEV;
-        }
-        if (acpi_check_region(sch_smba, SMBIOSIZE, sch_driver.name))
-                return -ENODEV;
-        if (!request_region(sch_smba, SMBIOSIZE, sch_driver.name)) {
+        if (!request_region(res->start, resource_size(res), dev->name)) {
                 dev_err(&dev->dev, "SMBus region 0x%x already in use!\n",
                         sch_smba);
                 return -EBUSY;
         }
+
+        sch_smba = res->start;
+
         dev_dbg(&dev->dev, "SMBA = 0x%X\n", sch_smba);
 
         /* set up the sysfs linkage to our parent device */
@@ -298,37 +277,43 @@ static int __devinit sch_probe(struct pci_dev *dev,
         retval = i2c_add_adapter(&sch_adapter);
         if (retval) {
                 dev_err(&dev->dev, "Couldn't register adapter!\n");
-                release_region(sch_smba, SMBIOSIZE);
+                release_region(res->start, resource_size(res));
                 sch_smba = 0;
         }
 
         return retval;
 }
 
-static void __devexit sch_remove(struct pci_dev *dev)
+static int __devexit smbus_sch_remove(struct platform_device *pdev)
 {
+        struct resource *res;
         if (sch_smba) {
                 i2c_del_adapter(&sch_adapter);
-                release_region(sch_smba, SMBIOSIZE);
+                res = platform_get_resource(pdev, IORESOURCE_IO, 0);
+                release_region(res->start, resource_size(res));
                 sch_smba = 0;
         }
+
+        return 0;
 }
 
-static struct pci_driver sch_driver = {
-        .name           = "isch_smbus",
-        .id_table       = sch_ids,
-        .probe          = sch_probe,
-        .remove         = __devexit_p(sch_remove),
+static struct platform_driver smbus_sch_driver = {
+        .driver = {
+                .name = "isch_smbus",
+                .owner = THIS_MODULE,
+        },
+        .probe          = smbus_sch_probe,
+        .remove         = __devexit_p(smbus_sch_remove),
 };
 
 static int __init i2c_sch_init(void)
 {
-        return pci_register_driver(&sch_driver);
+        return platform_driver_register(&smbus_sch_driver);
 }
 
 static void __exit i2c_sch_exit(void)
 {
-        pci_unregister_driver(&sch_driver);
+        platform_driver_unregister(&smbus_sch_driver);
 }
 
 MODULE_AUTHOR("Jacob Pan <jacob.jun.pan@intel.com>");
@@ -337,3 +322,4 @@ MODULE_LICENSE("GPL");
 
 module_init(i2c_sch_init);
 module_exit(i2c_sch_exit);
+MODULE_ALIAS("platform:isch_smbus");