Christian Marangi 9c55a47acf phy: airoha: Add support for Airoha AN7581 USB PHY ...

Add support for Airoha AN7581 USB PHY driver. AN7581 supports up to 2
USB port with USB 2.0 mode always supported and USB 3.0 mode available
only if the Serdes port is correctly configured for USB 3.0.

The second USB port on the SoC can be both used for USB 3.0 operation or
PCIe. (toggled by the SCU SSR register and configured by the USB PHY
driver)

If the USB 3.0 mode is not configured, the modes needs to be also
disabled in the xHCI node or the driver will report unsable clock and
fail probe.

Also USB 3.0 PHY instance are provided only if the airoha,serdes-port
and airoha,scu property is defined in DT, if it's not then USB 3.0 PHY
is assumed not supported.

For USB 2.0 Slew Rate calibration, airoha,usb2-monitor-clk-sel is
mandatory and is used to select the monitor clock for calibration.

Normally it's 1 for USB port 1 and 2 for USB port 2.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>

2025-11-07 17:21:45 -03:00

764 KiB

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