It is both I2C and SMBus. Title of the product itself is "USB 2.0 to I^2C/UART Protocol Converter with GPIO" https://www.microchip.com/wwwproducts/en/MCP2221A If I am mistaken in something, please help me with specific thing so that I can dive more from that perspective. On Wed, Jan 22, 2020 at 6:43 PM Wolfram Sang <wsa@xxxxxxxxxxxxx> wrote: > > On Tue, Jan 21, 2020 at 10:14:20AM +0530, Rishi Gupta wrote: > > MCP2221 is a USB HID to I2C/SMbus host bridge device. This > > commit implements i2c and smbus host adapter support. 7-bit > > address and i2c multi-message transaction is also supported. > > > > Signed-off-by: Rishi Gupta <gupt21@xxxxxxxxx> > > My main concern is there are quite some limitations in mcp_i2c_xfer(). > Looking at them, I think we should just drop it. This seems to be an > SMBus controller, not I2C. Or? >
