From: Bintian <bintian.wang@huawei.com>
To: Arnd Bergmann <arnd@arndb.de>
Cc: <linux-arm-kernel@lists.infradead.org>,
<linux-kernel@vger.kernel.org>, <catalin.marinas@arm.com>,
<will.deacon@arm.com>, <devicetree@vger.kernel.org>,
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<mark.rutland@arm.com>, <ijc+devicetree@hellion.org.uk>,
<galak@codeaurora.org>, <khilman@linaro.org>,
<mturquette@linaro.org>, <rob.herring@linaro.org>,
<zhangfei.gao@linaro.org>, <haojian.zhuang@linaro.org>,
<xuwei5@hisilicon.com>, <jh80.chung@samsung.com>,
<olof@lixom.net>, <yanhaifeng@gmail.com>, <sboyd@codeaurora.org>,
<xuejiancheng@huawei.com>, <sledge.yanwei@huawei.com>,
<tomeu.vizoso@collabora.com>, <linux@arm.linux.org.uk>,
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<tyler.baker@linaro.org>, <xuyiping@hisilicon.com>,
<wangbinghui@hisilicon.com>, <zhenwei.wang@hisilicon.com>,
<victor.lixin@hisilicon.com>, <puck.chen@hisilicon.com>,
<dan.zhao@hisilicon.com>, <huxinwei@huawei.com>,
<z.liuxinliang@huawei.com>, <heyunlei@huawei.com>,
<kong.kongxinwei@hisilicon.com>, <btw@mail.itp.ac.cn>,
<w.f@huawei.com>, <liguozhu@hisilicon.com>
Subject: Re: [PATCH v2 4/6] clk: hi6220: Clock driver support for Hisilicon hi6220 SoC
Date: Mon, 13 Apr 2015 21:57:46 +0800 [thread overview]
Message-ID: <552BCB5A.8010705@huawei.com> (raw)
In-Reply-To: <2254597.TWaxeZsKvK@wuerfel>
Hello Arnd,
Thanks for your code review.
On 2015/4/13 21:30, Arnd Bergmann wrote:
> On Monday 13 April 2015 17:17:38 Bintian Wang wrote:
>> +#define HI6220_CFG_CSI2PHY 8
>> +#define HI6220_ISP_SCLK_GATE 9
>> +#define HI6220_ISP_SCLK_GATE1 10
>> +#define HI6220_ADE_CORE_GATE 11
>> +#define HI6220_CODEC_VPU_GATE 12
>> +#define HI6220_MED_SYSPLL 13
>> +
>> +/* mux clocks */
>> +#define HI6220_1440_1200 20
>> +#define HI6220_1000_1200 21
>> +#define HI6220_1000_1440 22
>> +
>> +/* divider clocks */
>> +#define HI6220_CODEC_JPEG 30
>> +#define HI6220_ISP_SCLK_SRC 31
>> +#define HI6220_ISP_SCLK1 32
>>
>
> The numbers seem rather arbitrary, and you have both holes as well as duplicate
> numbers here. I would suggest you do one of two things instead:
I just worry about some special clocks may be added later so keep some
holes for them;
The duplicate numbers means clocks belong to different system control
domains.
>
> a) have a separate header file per clock driver and make all the
> numbers unique and consecutive within that header
>
> b) use the same numbers as the hardware registers so you can put the
> numbers directly into the dts and don't need a header to create
> an artificial ABI between the clock driver and the boot loader.
This header file will be used by device tree (I like using the clock
name instead "magic number" in dts :) ), so how about keep them in one
header file and let dts just include one header file (not four files),
but remove the holes?
Thank you Arnd.
BR,
Bintian
>
> Arnd
>
> .
>
WARNING: multiple messages have this Message-ID (diff)
From: Bintian <bintian.wang-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
To: Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>
Cc: linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
catalin.marinas-5wv7dgnIgG8@public.gmane.org,
will.deacon-5wv7dgnIgG8@public.gmane.org,
devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org,
pawel.moll-5wv7dgnIgG8@public.gmane.org,
mark.rutland-5wv7dgnIgG8@public.gmane.org,
ijc+devicetree-KcIKpvwj1kUDXYZnReoRVg@public.gmane.org,
galak-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org,
khilman-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org,
mturquette-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org,
rob.herring-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org,
zhangfei.gao-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org,
haojian.zhuang-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org,
xuwei5-C8/M+/jPZTeaMJb+Lgu22Q@public.gmane.org,
jh80.chung-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org,
olof-nZhT3qVonbNeoWH0uzbU5w@public.gmane.org,
yanhaifeng-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org,
sboyd-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org,
xuejiancheng-hv44wF8Li93QT0dZR+AlfA@public.gmane.org,
sledge.yanwei-hv44wF8Li93QT0dZR+AlfA@public.gmane.org,
tomeu.vizoso-ZGY8ohtN/8qB+jHODAdFcQ@public.gmane.org,
linux-lFZ/pmaqli7XmaaqVzeoHQ@public.gmane.org,
guodong.xu-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org,
jorge.ramirez-ortiz-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org,
tyler.baker-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org,
xuyiping-C8/M+/jPZTeaMJb+Lgu22Q@public.gmane.org,
wangbinghui-C8/M+/jPZTeaMJb+Lgu22Q@public.gmane.org,
zhenwei.wang-C8/M+/jPZTeaMJb+Lgu22Q@public.gmane.org,
victor.lixin-C8/M+/jPZTeaMJb+Lgu22Q@public.gmane.org,
puck.chen-C8/M+/jPZTeaMJb+Lgu22Q@public.gmane.org,
dan.zhao@hisilicon.c
Subject: Re: [PATCH v2 4/6] clk: hi6220: Clock driver support for Hisilicon hi6220 SoC
Date: Mon, 13 Apr 2015 21:57:46 +0800 [thread overview]
Message-ID: <552BCB5A.8010705@huawei.com> (raw)
In-Reply-To: <2254597.TWaxeZsKvK@wuerfel>
Hello Arnd,
Thanks for your code review.
On 2015/4/13 21:30, Arnd Bergmann wrote:
> On Monday 13 April 2015 17:17:38 Bintian Wang wrote:
>> +#define HI6220_CFG_CSI2PHY 8
>> +#define HI6220_ISP_SCLK_GATE 9
>> +#define HI6220_ISP_SCLK_GATE1 10
>> +#define HI6220_ADE_CORE_GATE 11
>> +#define HI6220_CODEC_VPU_GATE 12
>> +#define HI6220_MED_SYSPLL 13
>> +
>> +/* mux clocks */
>> +#define HI6220_1440_1200 20
>> +#define HI6220_1000_1200 21
>> +#define HI6220_1000_1440 22
>> +
>> +/* divider clocks */
>> +#define HI6220_CODEC_JPEG 30
>> +#define HI6220_ISP_SCLK_SRC 31
>> +#define HI6220_ISP_SCLK1 32
>>
>
> The numbers seem rather arbitrary, and you have both holes as well as duplicate
> numbers here. I would suggest you do one of two things instead:
I just worry about some special clocks may be added later so keep some
holes for them;
The duplicate numbers means clocks belong to different system control
domains.
>
> a) have a separate header file per clock driver and make all the
> numbers unique and consecutive within that header
>
> b) use the same numbers as the hardware registers so you can put the
> numbers directly into the dts and don't need a header to create
> an artificial ABI between the clock driver and the boot loader.
This header file will be used by device tree (I like using the clock
name instead "magic number" in dts :) ), so how about keep them in one
header file and let dts just include one header file (not four files),
but remove the holes?
Thank you Arnd.
BR,
Bintian
>
> Arnd
>
> .
>
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WARNING: multiple messages have this Message-ID (diff)
From: bintian.wang@huawei.com (Bintian)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 4/6] clk: hi6220: Clock driver support for Hisilicon hi6220 SoC
Date: Mon, 13 Apr 2015 21:57:46 +0800 [thread overview]
Message-ID: <552BCB5A.8010705@huawei.com> (raw)
In-Reply-To: <2254597.TWaxeZsKvK@wuerfel>
Hello Arnd,
Thanks for your code review.
On 2015/4/13 21:30, Arnd Bergmann wrote:
> On Monday 13 April 2015 17:17:38 Bintian Wang wrote:
>> +#define HI6220_CFG_CSI2PHY 8
>> +#define HI6220_ISP_SCLK_GATE 9
>> +#define HI6220_ISP_SCLK_GATE1 10
>> +#define HI6220_ADE_CORE_GATE 11
>> +#define HI6220_CODEC_VPU_GATE 12
>> +#define HI6220_MED_SYSPLL 13
>> +
>> +/* mux clocks */
>> +#define HI6220_1440_1200 20
>> +#define HI6220_1000_1200 21
>> +#define HI6220_1000_1440 22
>> +
>> +/* divider clocks */
>> +#define HI6220_CODEC_JPEG 30
>> +#define HI6220_ISP_SCLK_SRC 31
>> +#define HI6220_ISP_SCLK1 32
>>
>
> The numbers seem rather arbitrary, and you have both holes as well as duplicate
> numbers here. I would suggest you do one of two things instead:
I just worry about some special clocks may be added later so keep some
holes for them;
The duplicate numbers means clocks belong to different system control
domains.
>
> a) have a separate header file per clock driver and make all the
> numbers unique and consecutive within that header
>
> b) use the same numbers as the hardware registers so you can put the
> numbers directly into the dts and don't need a header to create
> an artificial ABI between the clock driver and the boot loader.
This header file will be used by device tree (I like using the clock
name instead "magic number" in dts :) ), so how about keep them in one
header file and let dts just include one header file (not four files),
but remove the holes?
Thank you Arnd.
BR,
Bintian
>
> Arnd
>
> .
>
next prev parent reply other threads:[~2015-04-13 14:02 UTC|newest]
Thread overview: 69+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-13 9:17 [PATCH v2 0/6] arm64,hi6220: Enable Hisilicon Hi6220 SoC Bintian Wang
2015-04-13 9:17 ` Bintian Wang
2015-04-13 9:17 ` Bintian Wang
2015-04-13 9:17 ` [PATCH v2 1/6] arm64: Enable Hisilicon ARMv8 SoC family in Kconfig and defconfig Bintian Wang
2015-04-13 9:17 ` Bintian Wang
2015-04-13 9:17 ` Bintian Wang
2015-04-20 21:10 ` Kevin Hilman
2015-04-20 21:10 ` Kevin Hilman
2015-04-20 21:10 ` Kevin Hilman
2015-04-21 0:39 ` Bintian
2015-04-21 0:39 ` Bintian
2015-04-21 0:39 ` Bintian
2015-04-13 9:17 ` [PATCH v2 2/6] arm64: hi6220: Document devicetree bindings for Hisilicon hi6220 SoC Bintian Wang
2015-04-13 9:17 ` Bintian Wang
2015-04-13 9:17 ` Bintian Wang
2015-04-13 9:17 ` [PATCH v2 3/6] clk: hi6220: Document devicetree bindings for hi6220 clock Bintian Wang
2015-04-13 9:17 ` Bintian Wang
2015-04-13 9:17 ` Bintian Wang
2015-04-13 15:32 ` Arnd Bergmann
2015-04-13 15:32 ` Arnd Bergmann
2015-04-13 15:32 ` Arnd Bergmann
2015-04-14 3:35 ` Bintian
2015-04-14 3:35 ` Bintian
2015-04-14 3:35 ` Bintian
2015-04-14 10:19 ` Arnd Bergmann
2015-04-14 10:19 ` Arnd Bergmann
2015-04-14 10:19 ` Arnd Bergmann
2015-04-14 12:37 ` Bintian
2015-04-14 12:37 ` Bintian
2015-04-14 12:37 ` Bintian
2015-04-14 13:20 ` Arnd Bergmann
2015-04-14 13:20 ` Arnd Bergmann
2015-04-14 13:20 ` Arnd Bergmann
2015-04-14 14:37 ` Brent Wang
2015-04-14 14:37 ` Brent Wang
2015-04-14 14:37 ` Brent Wang
2015-04-13 9:17 ` [PATCH v2 4/6] clk: hi6220: Clock driver support for Hisilicon hi6220 SoC Bintian Wang
2015-04-13 9:17 ` Bintian Wang
2015-04-13 9:17 ` Bintian Wang
2015-04-13 11:56 ` Paul Bolle
2015-04-13 11:56 ` Paul Bolle
2015-04-13 11:56 ` Paul Bolle
2015-04-13 13:17 ` Bintian
2015-04-13 13:17 ` Bintian
2015-04-13 13:17 ` Bintian
2015-04-13 14:15 ` Paul Bolle
2015-04-13 14:15 ` Paul Bolle
2015-04-13 14:15 ` Paul Bolle
2015-04-13 13:30 ` Arnd Bergmann
2015-04-13 13:30 ` Arnd Bergmann
2015-04-13 13:30 ` Arnd Bergmann
2015-04-13 13:57 ` Bintian [this message]
2015-04-13 13:57 ` Bintian
2015-04-13 13:57 ` Bintian
2015-04-13 15:34 ` Arnd Bergmann
2015-04-13 15:34 ` Arnd Bergmann
2015-04-13 15:34 ` Arnd Bergmann
2015-04-14 8:53 ` YiPing Xu
2015-04-14 8:53 ` YiPing Xu
2015-04-14 8:53 ` YiPing Xu
2015-04-13 9:17 ` [PATCH v2 5/6] arm64: Kconfig: Add clock support to ARCH_HISI Bintian Wang
2015-04-13 9:17 ` Bintian Wang
2015-04-13 9:17 ` Bintian Wang
2015-04-13 9:17 ` [PATCH v2 6/6] arm64: dts: Add dts files for Hisilicon Hi6220 SoC Bintian Wang
2015-04-13 9:17 ` Bintian Wang
2015-04-13 9:17 ` Bintian Wang
2015-04-14 14:44 ` Arnd Bergmann
2015-04-14 14:44 ` Arnd Bergmann
2015-04-14 14:44 ` Arnd Bergmann
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