[U-Boot] [PATCH v2 1/3] net: phy: mscc: add support for VSC8584 PHY

[Joe Hershberger]

On Wed, Oct 31, 2018 at 5:23 AM Quentin Schulz
<quentin.schulz at bootlin.com> wrote:
>
> The VSC8584 PHY is a 4-port PHY that is 10/100/1000BASE-T, 100BASE-FX,
> 1000BASE-X and triple-speed copper SFP capable, can communicate with the
> MAC via SGMII, QSGMII or 1000BASE-X, supports downshifting and can set
> the blinking pattern of each of its 4 LEDs, supports hardware offloading
> of MACsec and supports SyncE as well as HP Auto-MDIX detection.
>
> This adds support for 10/100/1000BASE-T and SGMII/QSGMII link with the
> MAC.
>
> The VSC8584 has also an internal Intel 8051 microcontroller whose
> firmware needs to be patched when the PHY is reset. If the 8051's
> firmware has the expected CRC, its patching can be skipped. The
> microcontroller can be accessed from any port of the PHY, though the CRC
> function can only be done through the PHY that is the base PHY of the
> package (internal address 0) due to a limitation of the firmware.
>
> The GPIO register bank is a set of registers that are common to all PHYs
> in the package. So any modification in any register of this bank affects
> all PHYs of the package.
>
> The revA of the VSC8584 PHY (which is not and will not be publicly
> released) should NOT patch the firmware of the microcontroller or it'll
> make things worse, the easiest way is just to not support it.
>
> Signed-off-by: Quentin Schulz <quentin.schulz at bootlin.com>

Acked-by: Joe Hershberger <joe.hershberger at ni.com>