[Intel-wired-lan] [PATCH 2/2] ice: add qsfp transceiver reset and presence pin control

[Marek Pazdan]

On Mon, 7 Apr 2025 22:30:54 +0200 Andrew Lunn wrote:

> As the name get/set-phy-tunable suggests, these are for PHY
> properties, like downshift, fast link down, energy detected power
> down.
> 
> What PHY are you using here?

Thanks for review.
It's PHY E810-C in this case. According to spreadsheet: E810_Datasheet_Rev2.4.pdf
(Chapter 17.3.3 E810 SDP[0:7] (GPIO) Connection), it's SDP0 and SDP2 GPIOs 
are being connected to QSFP Reset and Presence pins correspondingly.
I assume you may suggest this use case is not directly PHY related. In first approach
I tried to use reset operation which has following flag in enum ethtool_reset_flags:
ETH_RESET_PHY           = 1 << 6,       /* Transceiver/PHY */
but this doesn't allow for reset asserting and later deasserting so I took 'get/set-phy-tunable'.