Dear Sebastian Hesselbarth, On Fri, 16 Aug 2013 21:41:33 +0200, Sebastian Hesselbarth wrote: > This is a RFC adding initial support for the Marvell Armada 1500 > (88DE3100) found on various consumer devices (Chromecast, GoogleTV). > > Actually, it is a two-fold RFC also raising discussions on mach-mvebu > cleanup roadmap to allow other SoCs to hop into it. While mach-mvebu > originally was created to add support for Armada 370/XP and merge > existing Marvell Orion familiy into it, I am not so sure about > Armada 1500 fits that well (the mbus has gone!).
After talking a bit with engineers within Marvell that work on this SoC, I'm inclined to think that using mach-mvebu for this family of SoC is not a good idea. The reasons are: * This family of SoC is architecturally completely different from the family of Orion SoC: they use completely different hardware blocks (i.e none of the plat-orion stuff would apply, and none of the Orion device drivers would be useful), they don't use the MBus mechanism, etc. They are really a different family of SoC, almost as if they were coming from a different SoC company. * The SMP and power management code, as well as all the "glue" platform code that typically sits in mach-<foo> is going to be substantially, if not completely different from the one in mach-mvebu. I already believe doing all the "glue" platform code in mach-mvebu for all of Kirkwood, Dove, 370/XP, Orion5x and MV78xx0 is going to be a challenge, so I'd suggest to not add to this challenge a completely separate family of SOCs. The codename used for those Armada 1500 SOCs is "Berlin", so a name like mach-berlin, or mach-mvberlin (if we want to keep 'mv' to identify the founder) seems like a good name. Also, to help us understand the organization of the family of SOCs, I asked a few informations to Marvell, and here is what I could collect: """ BGxname CPU core codename L2 cache controller internal name BG2 PJ4B Armada1500 Tauros3 MV88DE3100 BG2-CT Cortex-A9 N/A PL310 N/A BG3 Cortex-A15 N/A CA15 integrated N/A """ As was told that the Armada X or MV88DEx names are not used during development, and what Marvell is really using are the BGxx names. Best regards, Thomas -- Thomas Petazzoni, Free Electrons Kernel, drivers, real-time and embedded Linux development, consulting, training and support. http://free-electrons.com -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
