linux-kernel - [PATCH v2 2/3] i2c: convert i2c-isch to platform

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Message-ID: <4B7C0E5D.3070909@compulab.co.il>
Date:	Wed, 17 Feb 2010 17:42:21 +0200
From:	Denis Turischev <denis@...pulab.co.il>
To:	LKML <linux-kernel@...r.kernel.org>
CC:	Samuel Ortiz <sameo@...ux.intel.com>,
	David Brownell <dbrownell@...rs.sourceforge.net>,
	Jean Delvare <khali@...ux-fr.org>, linux-i2c@...r.kernel.org,
	Mike Rapoport <mike@...pulab.co.il>
Subject: [PATCH v2 2/3] i2c: convert i2c-isch to platform_device

acpi_check_region will be implemented in mfd-core, therefore v2 version avoids
this check

Signed-off-by: Denis Turischev <denis@...pulab.co.il>

--- linux-2.6.33-rc7.orig/drivers/i2c/busses/i2c-isch.c	2010-02-07 00:17:12.000000000 +0200
+++ linux-2.6.33-rc7/drivers/i2c/busses/i2c-isch.c	2010-02-17 17:08:53.000000000 +0200
@@ -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 @@
  	.algo		= &smbus_algorithm,
  };

-static 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 @@
  	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@...el.com>");
@@ -337,3 +322,4 @@

  module_init(i2c_sch_init);
  module_exit(i2c_sch_exit);
+MODULE_ALIAS("platform:isch_smbus");
--
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