I2C controller on most of the omap devices has both master and slave capability but the i2c framework has been missing support for registering a bus in slave mode for long. Recently the i2c slave support has been added to i2c framework, the following patch adds the required support for omap_i2c driver to register a controller as a slave device and be deriven by an external/internal master. The slave interface requires us to add following mandatory events 1. I2C_SLAVE_WRITE_REQUESTED 2. I2C_SLAVE_READ_REQUESTED 3. I2C_SLAVE_WRITE_RECEIVED 4. I2C_SLAVE_READ_PROCESSED and 5. I2C_SLAVE_STOP The omap i2c controller (at least on dra7x devices) doesn't have start/stop (STT/STP) support for slave mode so event #5 is not implemented in the driver. Refer to Documentation/i2c/slave-interface for more info on i2c-slave-interface and Documentation/i2c/slave-eeprom-backend for sample backend driver. Tested on: DRA75x EVM Rev G3 and DRA72x EVM Rev B1 connected over i2c3 using DCAN2 lines [JP3] Ravikumar Kattekola (1): drivers: i2c: omap: Add slave support drivers/i2c/busses/i2c-omap.c | 144 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 144 insertions(+) -- 2.8.2.396.g5fe494c -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
