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| author | Jean Delvare <khali@linux-fr.org> | 2009-12-06 17:06:29 +0100 |
|---|---|---|
| committer | Jean Delvare <khali@linux-fr.org> | 2009-12-06 17:06:29 +0100 |
| commit | 38f41f282f1f88b4038f019de51cb95984e569d5 (patch) | |
| tree | d885feffa6639bfb8824c4e7a68135ceed436fe4 /Documentation/i2c | |
| parent | 4710317891e4824ce1510a6b5066abbd3e917750 (diff) | |
| download | lwn-38f41f282f1f88b4038f019de51cb95984e569d5.tar.gz lwn-38f41f282f1f88b4038f019de51cb95984e569d5.zip | |
i2c-stub: Allow user to disable some commands
Add a module parameter to override the functionality bitfield. This
lets the user disable some commands. This can be used to force a chip
driver to take different code paths.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'Documentation/i2c')
| -rw-r--r-- | Documentation/i2c/i2c-stub | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/i2c/i2c-stub b/Documentation/i2c/i2c-stub index d9c383b30925..326d1ee81e0e 100644 --- a/Documentation/i2c/i2c-stub +++ b/Documentation/i2c/i2c-stub @@ -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 |