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openSUSE:13.1:Update
i2c-tools
i2c-tools-r6110-i2cdetect-clarify-probing.diff
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File i2c-tools-r6110-i2cdetect-clarify-probing.diff of Package i2c-tools
Subject: i2cdetect: Clarify the SMBus commands used for probing by default Upstream: yes, r6110 Clarify the SMBus commands used for probing by default. --- tools/i2cdetect.8 | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) --- i2c-tools-3.1.0.orig/tools/i2cdetect.8 +++ i2c-tools-3.1.0/tools/i2cdetect.8 @@ -28,6 +28,12 @@ should correspond to one of the busses l The optional parameters \fIfirst\fR and \fIlast\fR restrict the scanning range (default: from 0x03 to 0x77). .PP +As there is no standard I2C detection command, i2cdetect uses arbitrary +SMBus commands (namely SMBus quick write and SMBus receive byte) to probe +for devices. By default, the command used is the one believed to be the +safest for each address. See options \fI-q\fR and \fI-r\fR to change this +behavior. +.PP i2cdetect can also be used to query the functionalities of an I2C bus (see option \fB-F\fP.) @@ -57,14 +63,12 @@ scripts. Force scanning of non-regular addresses. Not recommended. .TP .B "\-q" -Use SMBus "quick write" commands for probing (by default, the command -used is the one believed to be the safest for each address). +Use SMBus "quick write" command for probing. Not recommended. This is known to corrupt the Atmel AT24RF08 EEPROM found on many IBM Thinkpad laptops. .TP .B "\-r" -Use SMBus "read byte" commands for probing (by default, the command -used is the one believed to be the safest for each address). +Use SMBus "receive byte" command for probing. Not recommended. This is known to lock SMBus on various write-only chips (most notably clock chips at address 0x69). .TP
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