1 files changed, 20 insertions, 18 deletions

diff --git a/drivers/i2c/busses/i2c-ali1535.c b/drivers/i2c/busses/i2c-ali1535.c
index f14372ac2fc5..9cead9b9458e 100644
--- a/drivers/i2c/busses/i2c-ali1535.c
+++ b/drivers/i2c/busses/i2c-ali1535.c
@@ -1,6 +1,4 @@
 /*
-    i2c-ali1535.c - Part of lm_sensors, Linux kernel modules for hardware
-                    monitoring
     Copyright (c) 2000  Frodo Looijaard <frodol@dds.nl>, 
                         Philip Edelbrock <phil@netroedge.com>, 
                         Mark D. Studebaker <mdsxyz123@yahoo.com>,
@@ -61,6 +59,7 @@
 #include <linux/ioport.h>
 #include <linux/i2c.h>
 #include <linux/init.h>
+#include <linux/acpi.h>
 #include <asm/io.h>
 
 
@@ -159,6 +158,11 @@ static int ali1535_setup(struct pci_dev *dev)
                 goto exit;
         }
 
+        retval = acpi_check_region(ali1535_smba, ALI1535_SMB_IOSIZE,
+                                   ali1535_driver.name);
+        if (retval)
+                goto exit;
+
         if (!request_region(ali1535_smba, ALI1535_SMB_IOSIZE,
                             ali1535_driver.name)) {
                 dev_err(&dev->dev, "ALI1535_smb region 0x%x already in use!\n",
@@ -259,7 +263,7 @@ static int ali1535_transaction(struct i2c_adapter *adap)
                         dev_err(&adap->dev,
                                 "SMBus reset failed! (0x%02x) - controller or "
                                 "device on bus is probably hung\n", temp);
-                        return -1;
+                        return -EBUSY;
                 }
         } else {
                 /* check and clear done bit */
@@ -281,12 +285,12 @@ static int ali1535_transaction(struct i2c_adapter *adap)
 
         /* If the SMBus is still busy, we give up */
         if (timeout >= MAX_TIMEOUT) {
-                result = -1;
+                result = -ETIMEDOUT;
                 dev_err(&adap->dev, "SMBus Timeout!\n");
         }
 
         if (temp & ALI1535_STS_FAIL) {
-                result = -1;
+                result = -EIO;
                 dev_dbg(&adap->dev, "Error: Failed bus transaction\n");
         }
 
@@ -295,7 +299,7 @@ static int ali1535_transaction(struct i2c_adapter *adap)
          * do a printk.  This means that bus collisions go unreported.
          */
         if (temp & ALI1535_STS_BUSERR) {
-                result = -1;
+                result = -ENXIO;
                 dev_dbg(&adap->dev,
                         "Error: no response or bus collision ADD=%02x\n",
                         inb_p(SMBHSTADD));
@@ -303,13 +307,13 @@ static int ali1535_transaction(struct i2c_adapter *adap)
 
         /* haven't ever seen this */
         if (temp & ALI1535_STS_DEV) {
-                result = -1;
+                result = -EIO;
                 dev_err(&adap->dev, "Error: device error\n");
         }
 
         /* check to see if the "command complete" indication is set */
         if (!(temp & ALI1535_STS_DONE)) {
-                result = -1;
+                result = -ETIMEDOUT;
                 dev_err(&adap->dev, "Error: command never completed\n");
         }
 
@@ -332,7 +336,7 @@ static int ali1535_transaction(struct i2c_adapter *adap)
         return result;
 }
 
-/* Return -1 on error. */
+/* Return negative errno on error. */
 static s32 ali1535_access(struct i2c_adapter *adap, u16 addr,
                           unsigned short flags, char read_write, u8 command,
                           int size, union i2c_smbus_data *data)
@@ -357,10 +361,6 @@ static s32 ali1535_access(struct i2c_adapter *adap, u16 addr,
         outb_p(0xFF, SMBHSTSTS);
 
         switch (size) {
-        case I2C_SMBUS_PROC_CALL:
-                dev_err(&adap->dev, "I2C_SMBUS_PROC_CALL not supported!\n");
-                result = -1;
-                goto EXIT;
         case I2C_SMBUS_QUICK:
                 outb_p(((addr & 0x7f) << 1) | (read_write & 0x01),
                        SMBHSTADD);
@@ -418,13 +418,15 @@ static s32 ali1535_access(struct i2c_adapter *adap, u16 addr,
                                 outb_p(data->block[i], SMBBLKDAT);
                 }
                 break;
+        default:
+                dev_warn(&adap->dev, "Unsupported transaction %d\n", size);
+                result = -EOPNOTSUPP;
+                goto EXIT;
         }
 
-        if (ali1535_transaction(adap)) {
-                /* Error in transaction */
-                result = -1;
+        result = ali1535_transaction(adap);
+        if (result)
                 goto EXIT;
-        }
 
         if ((read_write == I2C_SMBUS_WRITE) || (size == ALI1535_QUICK)) {
                 result = 0;
@@ -475,7 +477,7 @@ static const struct i2c_algorithm smbus_algorithm = {
 static struct i2c_adapter ali1535_adapter = {
         .owner          = THIS_MODULE,
         .id             = I2C_HW_SMBUS_ALI1535,
-        .class          = I2C_CLASS_HWMON,
+        .class          = I2C_CLASS_HWMON | I2C_CLASS_SPD,
         .algo           = &smbus_algorithm,
 };