quick doc for the 1535.

git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@1237 7894878c-1315-0410-8ee3-d5d059ff63e0

doc/busses/i2c-ali1535

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+Kernel driver `i2c-ali5x3.o'
+
+Status: Beta.
+        Block reads/writes untested (not used by any current chip driver).
+
+Supported adapters:
+  * Acer Labs, Inc. ALI 1535
+    Datasheet: Available at the Acer Labs website (password may be required)
+
+
+
+Module Parameters
+-----------------
+
+none.
+
+
+Description
+-----------
+
+    This is the driver for the SMB Host controller on
+    Acer Labs Inc. (ALI) M1535 South Bridge.
+
+    The M1535 is a South bridge for portable systems.
+    It is very similar to the M15x3 South bridges also produced
+    by Acer Labs Inc.  Some of the registers within the part
+    have moved and some have been redefined slightly. Additionally,
+    the sequencing of the SMBus transactions has been modified
+    to be more consistent with the sequencing recommended by
+    the manufacturer and observed through testing.  These
+    changes are reflected in this driver and can be identified
+    by comparing this driver to the i2c-ali15x3 driver.
+    For an overview of these chips see http://www.acerlabs.com
+
+    The SMB controller is part of the 7101 device, which is an
+    ACPI-compliant Power Management Unit (PMU).
+
+    The whole 7101 device has to be enabled for the SMB to work.
+    You can't just enable the SMB alone.
+    The SMB and the ACPI have separate I/O spaces.
+    We make sure that the SMB is enabled. We leave the ACPI alone.
+
+    This driver controls the SMB Host only.
+
+    This driver does not use interrupts.
+
+Stability
+---------
+Beta.
+
+
+Supported Devices
+-----------------
+Acer Labs Inc. (ALI) M1535 South Bridge.
+
+Features
+--------
+This driver controls the SMB Host only.
+The SMB Slave controller on the M15X3 is not enabled.
+This driver does not use interrupts.
+
+