Hi Pawel, We are discussing if Cadence/TI/NXP could use the same USB PHY driver (drivers/phy/cadence/phy-cadence-sierra.c), I find I can't get Alan Douglas <adoug...@cadence.com>, would you please forward related people? The question is like below, thanks.
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 > > > > > > 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
