Re: [PATCH 0/4] Add HUSB311 Type-C controller

On Wed, Mar 11, 2026 at 10:32 PM Dragan Simic [off-list ref] wrote:

Hello Alexey,

On Wednesday, March 11, 2026 17:20 CET, Alexey Charkov [off-list ref] wrote:

quoted

HUSB311 is a drop-in replacement for RT1711H, used in Rockchip RK3576 EVB1
board and some other boards closely following the reference schematic.

The existing RT1711H driver seems to work fine with HUSB311, and there is
no public documentation available for HUSB311 to identify any meaningful
differences, so this series wires up the existing driver to treat
HUSB311 in the same way it treats RT1711H.

I'm a bit surprised that you haven't managed to find any HUSB311 datasheets,
because they are seemingly rather easy to obtain.  I've got a couple of
HUSB311 datasheet versions with the register descriptions and whatnot, would
you like me to send them over?

Hi Dragan,

The only ones I could find were those I linked in the commit messages
for the bindings and the driver change:
Link: https://www.hynetek.com/uploadfiles/site/219/news/0863c0c7-f535-4f09-bacd-0440d2c21088.pdf
Link: https://dl.xkwy2018.com/downloads/RK3588S/03_Product%20Line%20Branch_Tablet/02_Key%20Device%20Specifications/HUSB311%20introduction%2020210526.pdf

They are notably abridged in their register description (which is the
most relevant part as far as drivers are concerned), only covering the
common TCPCI registers and not any vendor defined extensions. It even
references registers in the 0x90 range on page 17 but doesn't describe
them.

Compare that for instance to the RT1711H datasheet:
Link: https://www.richtek.com/assets/product_file/RT1711H/DS1711H-04.pdf

It does look like 's/RT1711H/HUSB311/' apart from that omitted
vendor-defined range.

If you happen to see a version of a HUSB311 datasheet that includes a
description of the 0x90-0xaf register range I would definitely be
eager to have a look.

Best regards,
Alexey