On Fri, Aug 12, 2011 at 05:21:15AM -0400, Wayne Tams wrote: > Hi, > > I am having a little bother interfacing with a device that requires two command > bytes for both reads and writes. I can perform a successful write using I2C > writes but I would rather use the user-space i2c_smbus_ functions from > i2c-dev.h. In the i2c-dev documentation (http://lxr.free-electrons.com/source/ > Documentation/i2c/smbus-protocol?v=2.6.35;a=arm#L225) there is a mention of a > two byte command block read but there does not appear to be any supporting > function in i2c-dev.h. Is there a patch available to add this functionality or > could there be another approach? > > Just to clarify I need my smbus read transaction to look like this: > > > > S Addr Wr [A] Comm1 [A] Comm2 [A] S Addr Rd [A] [Data] A [Data] A ... A [Data] NA P > > Thanks > > Wayne Wrong mailing list. Try linux-i2c@xxxxxxxxxxxxxxx (copied). As a general hint, eeprom drivers such as drivers/misc/eeprom/at24.c do this; you might want to have a look. Guenter -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
