net: dsa: sja1105: add a PHY interface type compatibility matrix

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On the SJA1105, all ports support the parallel "xMII" protocols (MII,
RMII, RGMII) except for port 4 on SJA1105R/S which supports only SGMII.
This was relatively easy to model, by special-casing the SGMII port.

On the SJA1110, certain ports can be pinmuxed between SGMII and xMII, or
between SGMII and an internal 100base-TX PHY. This creates problems,
because the driver's assumption so far was that if a port supports
SGMII, it uses SGMII.

We allow the device tree to tell us how the port pinmuxing is done, and
check that against a PHY interface type compatibility matrix for
plausibility.

The other big change is that instead of doing SGMII configuration based
on what the port supports, we do it based on what is the configured
phy_mode of the port.

The 2500base-x support added in this patch is not complete.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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This commit is contained in:

Vladimir Oltean 2021-05-31 01:59:36 +03:00 • committed by Jakub Kicinski

parent bf4edf4afb

commit 91a050782c

3 changed files with 55 additions and 29 deletions

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5

drivers/net/dsa/sja1105/sja1105.h

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59

drivers/net/dsa/sja1105/sja1105_main.c

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20

drivers/net/dsa/sja1105/sja1105_spi.c

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