[PATCH u-boot-marvell] arm64: dts: armada-3720-espressobin: fix COMPHY nodes

[Andre Heider]

On 19/08/2020 11:57, Marek Behún wrote:
> This commit fixes initialization of COMPHY on EspressoBin.
> 
> Commit 22f418935be4 ("phy: marvell: a3700: Use comphy_mux on Armada
> 37xx.") introduced usage of comphy_mux on Armada 37xx comphy driver.
> The lanes are defined in comphy_a3700.c as described in functional
> specification, that is:
>    lane 0 is SGMII1 or USB3
>    lane 1 is PCIe or SGMII0
>    lane 2 is SATA or USB3
> 
> But the DTS for EspressoBin configures PCIe on lane 0 and USB3 on
> lane 1, which is wrong in the sense of the specification and doesn't
> work with the comphy_mux code, which is 2 years now (the aardvark driver
> causes synchronous abort in U-Boot).
> 
> It worked till the above mentioned commit, because the code for powering
> up PCIe PHY doesn't work with lane number at all, and the code for
> powering up USB3 PHY works differently only if USB3 is on lane 2, ie.
> the check goes like:
>    if (lane == 2)
>      something
>    else
>      something else
> so it does not differentiate between lanes 0 and 1.
> 
> In the future I shall post patches that remove the comphy_a3700 driver
> and add comphy driver which uses calls to ATF, like Linux' driver does.
> This will have the advantage of same DTS bindings as Linux', but till
> this is done, we need this patch.
> 
> Signed-off-by: Marek Behún <marek.behun at nic.cz>
> Tested-by: Pali Rohár <pali at kernel.org>
> Cc: Stefan Roese <sr at denx.de>

Tested-by: Andre Heider <a.heider at gmail.com>

Nice, thank you!

I remember getting these data aborts more than a year ago...

Andre