> > > > This is indeed a different driver. IMO it would be better to keep the > > driver closer to its linux version. The reason for that is that it is > > quite new and will be adapted when platforms starts supporting it. If > > we start with something too far from the original, it will hard to update. > > Already I see that the registers initialized are not all the same as > > in the linux driver and not all the values are the same either, nor > > are the register names > > > > TI's J7 platforms is using this PHY driver for USB3/PCIe support, and > > the linux driver has already seen quite a few modifications to get it > > to work > (https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgit.ti. > > com%2Fti-linux-kernel%2Fti-linux-kernel%2Fblobs%2Fhistory%2Fti-linux- > > 4.19.y%2Fdrivers%2Fphy%2Fcadence%2Fphy-cadence- > > sierra.c&data=02%7C01%7Csherry.sun%40nxp.com%7C84f9122d7eb64 > > 9820bae08d72b997681%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0 > > %7C637025810458595586&sdata=6JpD7VcFudhzXSVP0WaGVEp7Fwrue > > A%2B4V6eeOfif19w%3D&reserved=0) > > Adding support for it on top of this current version will be rather > > difficult. > > > > Thanks for your advice. > Actually I am not familiar with this phy driver in linux, so also +peter, who > worked on > this USB driver under linux, maybe he can give some suggestions. >
Add Alan from Cadence Alan, we find the suggested value at this driver (drivers/phy/cadence/phy-cadence-sierra.c) is so different with "USB 3.0 PHY User Guide for 28FDSOI" CH 3.1.1 Bring-up Sequence. Does this driver support this 28nm PHY? If it supports, why the initialized value is so different? The UG suggested value can be used at NXP platform. Peter _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
