+static int i2c_probe_address(struct i2c_adapter *adapter, int addr, int kind,
+ int (*found_proc) (struct i2c_adapter *, int, int))
+{
+ int err;
+
+ /* Make sure the address is valid */
+ if (addr < 0x03 || addr > 0x77) {
+ dev_warn(&adapter->dev, "Invalid probe address 0x%02x\n",
+ addr);
+ return -EINVAL;
+ }
+
+ /* Skip if already in use */
+ if (i2c_check_addr(adapter, addr))
+ return 0;
+
+ /* Make sure there is something at this address, unless forced */
+ if (kind < 0) {
+ if (i2c_smbus_xfer(adapter, addr, 0, 0, 0,
+ I2C_SMBUS_QUICK, NULL) < 0)
+ return 0;
+
+ /* prevent 24RF08 corruption */
+ if ((addr & ~0x0f) == 0x50)
+ i2c_smbus_xfer(adapter, addr, 0, 0, 0,
+ I2C_SMBUS_QUICK, NULL);
+ }
+
+ /* Finally call the custom detection function */
+ err = found_proc(adapter, addr, kind);
+
+ /* -ENODEV can be returned if there is a chip at the given address
+ but it isn't supported by this chip driver. We catch it here as
+ this isn't an error. */
+ return (err == -ENODEV) ? 0 : err;
+}
+