On 5/4/23 08:46, Krzysztof Kozlowski wrote:
On 03/05/2023 15:39, Michal Simek wrote:The Microchip usb5744 is a SS/HS USB 3.0 hub controller with 4 ports. The binding describes USB related aspects of the USB5744 hub, it as well cover the option of connecting the controller as an i2c slave. When i2c interface is connected hub needs to be initialized first. Hub itself has fixed i2c address 0x2D but hardcoding address is not good idea because address can be shifted by i2c address translator in the middle. Signed-off-by: Piyush Mehta <piyush.mehta@xxxxxxx> Signed-off-by: Michal Simek <michal.simek@xxxxxxx> --- It looks like that usb8041 has also an optional i2c interface which is not covered. But it is mentioned at commit 40e58a8a7ca6 ("dt-bindings: usb: Add binding for TI USB8041 hub controller"). i2c-bus name property was suggested by Rob at https://lore.kernel.org/all/CAL_JsqJedhX6typpUKbnzV7CLK6UZVjq3CyG9iY_j5DLPqvVdw@xxxxxxxxxxxxxx/ and https://lore.kernel.org/all/CAL_JsqJZBbu+UXqUNdZwg-uv0PAsNg55026PTwhKr5wQtxCjVQ@xxxxxxxxxxxxxx/ the question is if adding address like this is acceptable. But it must be specified.Why? phandle points it explicitly.
Ok it means just list usb hub on i2c with label and point to it. Works for me. Thanks, Michal
