diff --git a/doc/chips/SUMMARY b/doc/chips/SUMMARY
index 2e446559..d8e6023a 100644
--- a/doc/chips/SUMMARY
+++ b/doc/chips/SUMMARY
@@ -207,12 +207,14 @@ smartbatt
 	smartbatt	1	1	-	-	yes	no
 
 smsc47m1
+	(all are reported as a "smsc47m1")
 	smsc47b27x	-	-	2	2	no	yes (LPC)
 	smsc47m10x	-	-	2	2	no	yes (LPC)
 	smsc47m13x	-	-	2	2	no	yes (LPC)
 	smsc47m14x	-	-	2	2	no	yes (LPC)
 	smsc47m15x	-	-	2	2	no	yes (LPC)
 	smsc47m192	-	-	2	2	no	yes (LPC)
+	smsc47m997	-	-	2	2	no	yes (LPC)
 
 thmc50
 	adm1022		3	2	-	1 dac	yes	no
diff --git a/doc/chips/smsc47m1 b/doc/chips/smsc47m1
index 70e99753..17767068 100644
--- a/doc/chips/smsc47m1
+++ b/doc/chips/smsc47m1
@@ -14,6 +14,10 @@ Supported chips:
 	http://www.smsc.com/main/datasheets/47m14x.pdf
 	http://www.smsc.com/main/tools/discontinued/47m15x.pdf
 	http://www.smsc.com/main/datasheets/47m192.pdf
+  * SMSC LPC47M997
+    Addresses scanned: none, address read from Super I/O config space
+    Prefix: 'smsc47m1'
+    Datasheet: none
 
 Authors: Mark D. Studebaker <mdsxyz123@yahoo.com>
 	 With assistance from Bruce Allen <ballen@uwm.edu> and his
@@ -39,6 +43,9 @@ The 47M15x and 47M192 chips contain a full 'hardware monitoring block'
 in addition to the fan monitoring and control. The hardware monitoring
 block is not supported by the driver.
 
+No documentation is available for the 47M997, but it has the same device
+ID as the 47M15x and 47M192 chips and seems to be compatible therewith.
+
 Fan rotation speeds are reported in RPM (rotations per minute). An alarm is
 triggered if the rotation speed has dropped below a programmable limit. Fan 
 readings can be divided by a programmable divider (1, 2, 4 or 8) to give
diff --git a/kernel/chips/smsc47m1.c b/kernel/chips/smsc47m1.c
index 5eef6bda..c2ebbbc7 100644
--- a/kernel/chips/smsc47m1.c
+++ b/kernel/chips/smsc47m1.c
@@ -85,6 +85,8 @@ superio_exit(void)
  * LPC47B27x (device id 0x51) have fan control.
  * The 47M15x and 47M192 chips "with hardware monitoring block"
  * can do much more besides (device id 0x60).
+ * The LPC47M997 is undocumented, but seems to be compatible with
+ * the LPC47M192, and has the same device id.
  */
 #define SMSC_DEVID_MATCH(id) ((id) == 0x51 || (id) == 0x59 || (id) == 0x5F || (id) == 0x60)
 
diff --git a/prog/detect/sensors-detect b/prog/detect/sensors-detect
index ba9fe6e3..daae0076 100755
--- a/prog/detect/sensors-detect
+++ b/prog/detect/sensors-detect
@@ -1463,7 +1463,7 @@ use subs qw(mtp008_detect lm78_detect lm78_isa_detect lm78_alias_detect
        i2c_detect => sub { m5879_detect @_},
      },
      {
-       name => "SMSC LPC47M15x or LPC47M192",
+       name => "SMSC LPC47M15x, LPC47M192 or LPC47M997",
        driver => "to-be-written",
        i2c_addrs => [0x2c..0x2d],
        i2c_detect => sub { smsc47m192_detect @_ },
@@ -1721,7 +1721,7 @@ use subs qw(mtp008_detect lm78_detect lm78_isa_detect lm78_alias_detect
 	logdev => 0x0a,
       },
       {
-	name => "SMSC 47M15x/192 Super IO Fan Sensors",
+	name => "SMSC 47M15x/192/997 Super IO Fan Sensors",
 	driver => "smsc47m1",
 	devid => 0x60,
 	logdev => 0x0a,