Commit graph

2 commits

Author SHA1 Message Date
Neil Armstrong
adbff64af7 board: amlogic: vim3: add support for dynamic PCIe enable
The VIM3 on-board  MCU can mux the PCIe/USB3.0 shared differential
lines using a FUSB340TMX USB 3.1 SuperSpeed Data Switch between
an USB3.0 Type A connector and a M.2 Key M slot.
The PHY driving these differential lines is shared between
the USB3.0 controller and the PCIe Controller, thus only
a single controller can use it.

This adds this dynamic switching right before booting Linux
and the configuration steps in the boards documentation.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Kevin Hilman <khilman@baylibre.com>
Tested-by: Kevin Hilman <khilman@baylibre.com>
[narmstrong: fixed warning by replacing min() by min_t()]
2020-10-05 17:59:45 +02:00
Neil Armstrong
5aeecbcf81 board: amlogic: add a vim3 specific board support
The VIM3 will need a specific code to enable PCIe if enabled in the MCU,
thus add a specific board support for VIM3 & VIM3L.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Kevin Hilman <khilman@baylibre.com>
Tested-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
2020-10-05 17:59:45 +02:00