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authorR.Marek@sh.cvut.cz <R.Marek@sh.cvut.cz>2005-05-26 08:42:19 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2005-06-22 00:52:02 -0400
commit7f15b66468b7003d5241e352a007e73be5519b20 (patch)
treec9333e14baae06a831c8515d9e1e24808826053e /Documentation/i2c/chips/smsc47b397
parent2bf34a1ca9d570dd4fab4d95c4de82d873ecf718 (diff)
[PATCH] I2C: documentation update 2/3
This patch adds missing documentation for system health monitoring chips. I would like to thank all people, who helped me with this project. Signed-off-by: Rudolf Marek <r.marek@sh.cvut.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'Documentation/i2c/chips/smsc47b397')
-rw-r--r--Documentation/i2c/chips/smsc47b39722
1 files changed, 17 insertions, 5 deletions
diff --git a/Documentation/i2c/chips/smsc47b397 b/Documentation/i2c/chips/smsc47b397
index 4737bb6109da..da9d80c96432 100644
--- a/Documentation/i2c/chips/smsc47b397
+++ b/Documentation/i2c/chips/smsc47b397
@@ -1,7 +1,19 @@
1Kernel driver smsc47b397
2========================
3
4Supported chips:
5 * SMSC LPC47B397-NC
6 Prefix: 'smsc47b397'
7 Addresses scanned: none, address read from Super I/O config space
8 Datasheet: In this file
9
10Authors: Mark M. Hoffman <mhoffman@lightlink.com>
11 Utilitek Systems, Inc.
12
1November 23, 2004 13November 23, 2004
2 14
3The following specification describes the SMSC LPC47B397-NC sensor chip 15The following specification describes the SMSC LPC47B397-NC sensor chip
4(for which there is no public datasheet available). This document was 16(for which there is no public datasheet available). This document was
5provided by Craig Kelly (In-Store Broadcast Network) and edited/corrected 17provided by Craig Kelly (In-Store Broadcast Network) and edited/corrected
6by Mark M. Hoffman <mhoffman@lightlink.com>. 18by Mark M. Hoffman <mhoffman@lightlink.com>.
7 19
@@ -10,10 +22,10 @@ by Mark M. Hoffman <mhoffman@lightlink.com>.
10Methods for detecting the HP SIO and reading the thermal data on a dc7100. 22Methods for detecting the HP SIO and reading the thermal data on a dc7100.
11 23
12The thermal information on the dc7100 is contained in the SIO Hardware Monitor 24The thermal information on the dc7100 is contained in the SIO Hardware Monitor
13(HWM). The information is accessed through an index/data pair. The index/data 25(HWM). The information is accessed through an index/data pair. The index/data
14pair is located at the HWM Base Address + 0 and the HWM Base Address + 1. The 26pair is located at the HWM Base Address + 0 and the HWM Base Address + 1. The
15HWM Base address can be obtained from Logical Device 8, registers 0x60 (MSB) 27HWM Base address can be obtained from Logical Device 8, registers 0x60 (MSB)
16and 0x61 (LSB). Currently we are using 0x480 for the HWM Base Address and 28and 0x61 (LSB). Currently we are using 0x480 for the HWM Base Address and
170x480 and 0x481 for the index/data pair. 290x480 and 0x481 for the index/data pair.
18 30
19Reading temperature information. 31Reading temperature information.
@@ -50,7 +62,7 @@ Reading the tach LSB locks the tach MSB.
50The LSB Must be read first. 62The LSB Must be read first.
51 63
52How to convert the tach reading to RPM. 64How to convert the tach reading to RPM.
53The tach reading (TCount) is given by: (Tach MSB * 256) + (Tach LSB) 65The tach reading (TCount) is given by: (Tach MSB * 256) + (Tach LSB)
54The SIO counts the number of 90kHz (11.111us) pulses per revolution. 66The SIO counts the number of 90kHz (11.111us) pulses per revolution.
55RPM = 60/(TCount * 11.111us) 67RPM = 60/(TCount * 11.111us)
56 68