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authorJens Axboe <jaxboe@fusionio.com>2010-11-16 10:09:42 +0100
committerJens Axboe <jaxboe@fusionio.com>2010-11-16 10:09:42 +0100
commita02056349cdea2252cd2b21643ebf025e83a29f2 (patch)
treeb7c889d6cbe8e7188d07d99a5c9da858c53a5b6c /Documentation/hwmon/pcf8591
parent34db1d595ef6f183fbc1e42cda45a3dfa0035258 (diff)
parente53beacd23d9cb47590da6a7a7f6d417b941a994 (diff)
downloadblackbird-op-linux-a02056349cdea2252cd2b21643ebf025e83a29f2.tar.gz
blackbird-op-linux-a02056349cdea2252cd2b21643ebf025e83a29f2.zip
Merge branch 'v2.6.37-rc2' into for-2.6.38/core
Diffstat (limited to 'Documentation/hwmon/pcf8591')
-rw-r--r--Documentation/hwmon/pcf859118
1 files changed, 8 insertions, 10 deletions
diff --git a/Documentation/hwmon/pcf8591 b/Documentation/hwmon/pcf8591
index e76a7892f68e..ac020b3bb7b3 100644
--- a/Documentation/hwmon/pcf8591
+++ b/Documentation/hwmon/pcf8591
@@ -4,7 +4,7 @@ Kernel driver pcf8591
Supported chips:
* Philips/NXP PCF8591
Prefix: 'pcf8591'
- Addresses scanned: I2C 0x48 - 0x4f
+ Addresses scanned: none
Datasheet: Publicly available at the NXP website
http://www.nxp.com/pip/PCF8591_6.html
@@ -58,18 +58,16 @@ Module parameters
Accessing PCF8591 via /sys interface
-------------------------------------
-! Be careful !
-The PCF8591 is plainly impossible to detect! Stupid chip.
-So every chip with address in the interval [0x48..0x4f] is
-detected as PCF8591. If you have other chips in this address
-range, the workaround is to load this module after the one
-for your others chips.
+The PCF8591 is plainly impossible to detect! Thus the driver won't even
+try. You have to explicitly instantiate the device at the relevant
+address (in the interval [0x48..0x4f]) either through platform data, or
+using the sysfs interface. See Documentation/i2c/instantiating-devices
+for details.
-On detection (i.e. insmod, modprobe et al.), directories are being
-created for each detected PCF8591:
+Directories are being created for each instantiated PCF8591:
/sys/bus/i2c/devices/<0>-<1>/
-where <0> is the bus the chip was detected on (e. g. i2c-0)
+where <0> is the bus the chip is connected to (e. g. i2c-0)
and <1> the chip address ([48..4f])
Inside these directories, there are such files:
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