[PATCH v2] i2c-ali1535: enable SPARC support

["corentin.labbe" <corentin.labbe-Um+J1D3rkBVWj0EZb7rXcA@public.gmane.org>]

hello

I have a sun blade 100 and I want to get the sensors working with
lm_sensors, but in current state, it doesn't work.

After some research, I have found that all SMBUS driver and the i2c_ali1535 particularly can't work.
It assumes that ioport address are 16bits wide (address stored with an unsigned short).
But on SPARC arch, ioports are mapped in memory and so are stored with an unsigned long.

So I write this patch for i2c_ali1535 for supporting SPARC architecture.
With this patch, the driver i2c_ali1535 loads and works successfully.
# sensors
adm1023-i2c-0-18
Adapter: SMBus ALI1535 adapter at 0x1fe02000620
temp1:       +31.0 C  (low  = -55.0 C, high = +127.0 C)
temp2:       +61.6 C  (low  = -55.0 C, high = +127.0 C)

I sent this patch for review at sparclinux-u79uwXL29TY76Z2rM5mHXA@public.gmane.org and one person confirm me that it works on his sun-blade 100.

Bests regards,

Signed-off-by: LABBE Corentin <corentin.labbe-Um+J1D3rkBVWj0EZb7rXcA@public.gmane.org>
---
--- linux/drivers/i2c/busses/i2c-ali1535.c.orig	2011-06-15 18:02:56.000000000 +0200
+++ linux/drivers/i2c/busses/i2c-ali1535.c	2011-06-15 18:05:26.000000000 +0200
@@ -132,7 +132,7 @@
 #define	ALI1535_SMBIO_EN	0x04	/* SMB I/O Space enable		*/

 static struct pci_driver ali1535_driver;
-static unsigned short ali1535_smba;
+static unsigned long ali1535_smba;

 /* Detect whether a ALI1535 can be found, and initialize it, where necessary.
    Note the differences between kernels with the old PCI BIOS interface and
@@ -142,6 +142,7 @@ static int __devinit ali1535_setup(struc
 {
 	int retval = -ENODEV;
 	unsigned char temp;
+	unsigned short offset;

 	/* Check the following things:
 		- SMB I/O address is initialized
@@ -149,15 +150,27 @@ static int __devinit ali1535_setup(struc
 		- We can use the addresses
 	*/

+	if (pci_enable_device(dev)) {
+		dev_err(&dev->dev, "ALI1535_smb cant enable device");
+		goto exit;
+	}
+
 	/* Determine the address of the SMBus area */
-	pci_read_config_word(dev, SMBBA, &ali1535_smba);
-	ali1535_smba &= (0xffff & ~(ALI1535_SMB_IOSIZE - 1));
-	if (ali1535_smba == 0) {
+	pci_read_config_word(dev, SMBBA, &offset);
+	dev_dbg(&dev->dev, "ALI1535_smb is at offset 0x%04x", offset);
+	offset &= (0xffff & ~(ALI1535_SMB_IOSIZE - 1));
+	if (offset == 0) {
 		dev_warn(&dev->dev,
 			"ALI1535_smb region uninitialized - upgrade BIOS?\n");
 		goto exit;
 	}

+	ali1535_smba = pci_resource_start(dev, 0) + offset;
+	if ((pci_resource_flags(dev, 0) & IORESOURCE_IO) == 0) {
+		dev_err(&dev->dev, "ALI1535_smb bar 0 is not IORESOURCE_IO");
+		goto exit;
+	}
+
 	retval = acpi_check_region(ali1535_smba, ALI1535_SMB_IOSIZE,
 				   ali1535_driver.name);
 	if (retval)
@@ -165,7 +178,7 @@ static int __devinit ali1535_setup(struc

 	if (!request_region(ali1535_smba, ALI1535_SMB_IOSIZE,
 			    ali1535_driver.name)) {
-		dev_err(&dev->dev, "ALI1535_smb region 0x%x already in use!\n",
+		dev_err(&dev->dev, "ALI1535_smb region 0x%lx already in use!\n",
 			ali1535_smba);
 		goto exit;
 	}
@@ -196,7 +209,7 @@ static int __devinit ali1535_setup(struc
 	*/
 	pci_read_config_byte(dev, SMBREV, &temp);
 	dev_dbg(&dev->dev, "SMBREV = 0x%X\n", temp);
-	dev_dbg(&dev->dev, "ALI1535_smba = 0x%X\n", ali1535_smba);
+	dev_dbg(&dev->dev, "ALI1535_smba = 0x%0lx\n", ali1535_smba);

 	retval = 0;
 exit:
@@ -499,7 +512,7 @@ static int __devinit ali1535_probe(struc
 	ali1535_adapter.dev.parent = &dev->dev;

 	snprintf(ali1535_adapter.name, sizeof(ali1535_adapter.name),
-		"SMBus ALI1535 adapter at %04x", ali1535_smba);
+		"SMBus ALI1535 adapter at %0lx", ali1535_smba);
 	return i2c_add_adapter(&ali1535_adapter);
 }