linux-kernel - Re: [PATCH v8 0/7] arm64,hi6220: Enable Hisilicon Hi6220 SoC

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Message-ID: <7hwpzrdm5i.fsf@deeprootsystems.com>
Date:	Fri, 29 May 2015 16:00:41 -0700
From:	Kevin Hilman <khilman@...nel.org>
To:	Bintian Wang <bintian.wang@...wei.com>
Cc:	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, <catalin.marinas@....com>,
	<will.deacon@....com>, <devicetree@...r.kernel.org>,
	<robh+dt@...nel.org>, <pawel.moll@....com>, <mark.rutland@....com>,
	<ijc+devicetree@...lion.org.uk>, <galak@...eaurora.org>,
	<mturquette@...aro.org>, <rob.herring@...aro.org>,
	<zhangfei.gao@...aro.org>, <haojian.zhuang@...aro.org>,
	<xuwei5@...ilicon.com>, <jh80.chung@...sung.com>, <olof@...om.net>,
	<yanhaifeng@...il.com>, <sboyd@...eaurora.org>,
	<xuejiancheng@...wei.com>, <sledge.yanwei@...wei.com>,
	<tomeu.vizoso@...labora.com>, <linux@....linux.org.uk>,
	<guodong.xu@...aro.org>, <jorge.ramirez-ortiz@...aro.org>,
	<tyler.baker@...aro.org>, <pebolle@...cali.nl>, <arnd@...db.de>,
	<marc.zyngier@....com>, <xuyiping@...ilicon.com>,
	<wangbinghui@...ilicon.com>, <zhenwei.wang@...ilicon.com>,
	<victor.lixin@...ilicon.com>, <puck.chen@...ilicon.com>,
	<dan.zhao@...ilicon.com>, <huxinwei@...wei.com>,
	<z.liuxinliang@...wei.com>, <heyunlei@...wei.com>,
	<kong.kongxinwei@...ilicon.com>, <wangbintian@...il.com>,
	<w.f@...wei.com>, <liguozhu@...ilicon.com>,
	peter.griffin@...aro.org
Subject: Re: [PATCH v8 0/7] arm64,hi6220: Enable Hisilicon Hi6220 SoC

Hi Bintian,

Bintian Wang <bintian.wang@...wei.com> writes:

> From: Bintian Wang <wangbintian@...il.com>
>
> Hi6220 is one mobile solution of Hisilicon, this patchset contains
> initial support for Hi6220 SoC and HiKey development board, which
> supports octal ARM Cortex A53 cores. Initial support is minimal and
> includes just the arch configuration, clock driver, device tree
> configuration.
>
> PSCI is enabled in device tree and there is no problem to boot all the
> octal cores, and the CPU hotplug is also working now, you can download
> and compile the latest firmware based on the following link to run this
> patch set:
> https://github.com/96boards/documentation/wiki/UEFI
>
> Changes v6~v8:
> This three versions only modified the clock drivers based on the
> Stephen's review advices.
> * clk-hi6220.c:
>   ** Split the clock header file from clock driver
>   ** Delete setting the parents clock of UART1 to HI6220_150M in clock
>      driver, we can do that using assigned-clock in dts when enable
>      UART1 in the future.
> * clkdivider-hi6220.c: 
>   ** Reuse some functions exported by clk-divider.c
>   ** Remove "pr_err" and CLK_IS_BASIC flag
>   ** Fix some programing style problems
> * hisilicon/clk.h: remove the "__init" markings on some funcition
>   prototypes.

It's not clear what kernel this series is meant to apply to.  It doesn't
apply cleanly to v4.1-rc2 (the version stated for v5) or the current -rc
(v4.1-rc5) it also doesn't apply cleanly to linus/master or linux-next.

If the series doesn't apply to Linus tree, please state clearly in the
changelog what tree it should apply to as well as any dependncies.

Also, this version is missing patch 1 from the v6 series, which adds the
Kconfig/defconfig changes. Without that patch, nothing in this series is
even compiled (clk driver or DTS files.)

So my recommendation, since the clock driver is very close to being
merged:

Please create a v9 series with *only* the patches that are not already
queued up on the clk tree[1].  That should be patches 1-3 and 7 of this
series, plus patch 1 from v6.

That series should apply cleanly to v4.1-rc1 (or a newer -rc if there
are dependencies.)  In the changelog to that series, state the version
that it applies to, and also state that it depends on the clk-next
branch where the clock maintainers have queued up the driver[1].

Then all that's left is to collect an ack from a DT maintainer, and
these can be queued up via the arm-soc tree.

FWIW, I've boot tested patches 1-3 and 7 of this series, plus patch 1
from v6 combined with the clk-next-hi6220 branch[1] on my board (which
uses ATF + mainline u-boot) and all 8 A53 cores are coming up, so feel
free to add:

Tested-by: Kevin Hilman <khilman@...aro.org>

to your v9 series.

Thanks,

Kevin

[1] git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux.git clk-next-hi6220
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