Re: [PATCH v2] HID: mcp2221: add usb to i2c-smbus host bridge driver

[rishi gupta]

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?
>