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| author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2010-01-12 12:59:05 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2010-01-12 12:59:05 +0000 |
| commit | 163849ea9b4c5d50fbd324692461983d18faadad (patch) | |
| tree | 7176a18fea53560eb4092aa103d94a266ab4e60d /Documentation/i2c/i2c-stub | |
| parent | 2138301e1687bd4f22aa2b4df4829b6ffdae19bc (diff) | |
| parent | 5ee518ecbcb5934e284ea51a19a939c891f5f7ea (diff) | |
Merge branch 'for-2.6.33' into for-2.6.34
Diffstat (limited to 'Documentation/i2c/i2c-stub')
| -rw-r--r-- | Documentation/i2c/i2c-stub | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/Documentation/i2c/i2c-stub b/Documentation/i2c/i2c-stub index 0d8be1c20c16..fa4b669c166b 100644 --- a/Documentation/i2c/i2c-stub +++ b/Documentation/i2c/i2c-stub @@ -2,9 +2,9 @@ MODULE: i2c-stub DESCRIPTION: -This module is a very simple fake I2C/SMBus driver. It implements four -types of SMBus commands: write quick, (r/w) byte, (r/w) byte data, and -(r/w) word data. +This module is a very simple fake I2C/SMBus driver. It implements five +types of SMBus commands: write quick, (r/w) byte, (r/w) byte data, (r/w) +word data, and (r/w) I2C block data. You need to provide chip addresses as a module parameter when loading this driver, which will then only react to SMBus commands to these addresses. @@ -21,8 +21,8 @@ EEPROMs, among others. The typical use-case is like this: 1. load this module - 2. use i2cset (from lm_sensors project) to pre-load some data - 3. load the target sensors chip driver module + 2. use i2cset (from the i2c-tools project) to pre-load some data + 3. load the target chip driver module 4. observe its behavior in the kernel log There's a script named i2c-stub-from-dump in the i2c-tools package which @@ -33,6 +33,12 @@ PARAMETERS: int chip_addr[10]: The SMBus addresses to emulate chips at. +unsigned long functionality: + Functionality override, to disable some commands. See I2C_FUNC_* + constants in <linux/i2c.h> for the suitable values. For example, + value 0x1f0000 would only enable the quick, byte and byte data + commands. + CAVEATS: If your target driver polls some byte or word waiting for it to change, the |