On Wed, Feb 03, 2016 at 03:52:09PM +0800, Guodong Xu wrote:

> As of v4.4, already upstreamed:

> - clk, psci, basic dts, uart, cpufreq, cpuidle, mailbox, emmc, wifi driver
> fix, and tsensor (thermal)

Of these only the clock, PSCI and the UART appear to be included in the
DTS.  If a feature is not enabled in the DTS most people would not
understand it as being supported upstream for the board since there is
no way for someone to actually use any of these features if they use
mainline.

> - hikey can boot using vanilla v4.4 kernel and defconfig.

It can boot to serial console with a ramdisk, nothing else.  There is a
serious discrepency between the features you are reporting as supported
upstream and the features that are actually supported upstream, the set
supported upstream is has not changed substantially since merge.

> v4.5-rc1:

> USB: driver, 37dd9d6 usb: dwc2: add support of hi6220.

Again, this does not appear in the DT and is therefore unusable for
anyone using mainline.

> Slated for v4.6 merge-window:

> hisi-reset driver: in linux-next ( http://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/tree/drivers/reset/hisilicon?h=next-20160129
> )

This seems to already be in Linus' tree so unless some major problem is
discovered it should be in v4.5.

> DTS: in maintainer's git repo: <https://github.com/hisilicon/linux-hisi>
>
> - Including: gpio, pinctrl, i2c

This does not appear to be part of the kernel development process, it
does not appear in -next and I can't see any prior cases where a pull
request from this tree has made it into -next.  I don't see that there
is any reasonable expectation that anything there will make it into
mainline.

Like I said above there is a big difference between what you are
reporting as upstream and the features that are practically usable
upstream.  This is creating a lot of frustration on the part of
potential users who want to work on mainline, both with the lack of
features itself and with the fact that lists of supported features are
typically substantially inaccurate which makes people feel they are
being mislead.