On 30.07.2022 19:06, Martin Blumenstingl wrote:

Hi Heiner,

On Sat, Jul 30, 2022 at 5:59 PM Heiner Kallweit [off-list ref] wrote:

quoted

Meson GXL and Rockchip ethernet PHY drivers have quite something in common.
They share a number of non-standard registers, using the same bits
and same bank handling. This makes me think they they may be using
the same IP. However they have different quirk handling. But this
doesn't rule out that actually they would need the same quirk handling.

You made me curious and I found the following public Microchip
LAN83C185 datasheet: [0]
Page 27 has a "SMI REGISTER MAPPING" which matches the definitions in
meson-gxl.c.
Also on page 33 the interrupt source bits are a 100% match with the
INTSRC_* marcos in meson-gxl.c

Great, thanks for investigating!

Whether this means that:
- Amlogic SoCs embed a LAN83C185
- LAN83C185 is based on the same IP core (possibly not even designed
by Amlogic or SMSC)
- the SMI interface design is something that one hardware engineer
brought from one company to another
- ...something else
is something I can't tell


Best regards,
Martin


[0] https://ww1.microchip.com/downloads/en/DeviceDoc/LAN83C185-Data-Sheet-DS00002808A.pdf