linux-kernel - Re: [PATCHv2 4/5] clk: samsung: exynos5410: Add fixed rate clocks

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAEe5pB_7e_5YkpcuRvsaUg6vKfdu6C+XhwRYyY1uUGptxM5zkg@mail.gmail.com>
Date:	Thu, 31 Jul 2014 15:23:03 +0200
From:	Humberto Naves <hsnaves@...il.com>
To:	Tomasz Figa <tomasz.figa@...il.com>
Cc:	linux-samsung-soc <linux-samsung-soc@...r.kernel.org>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-doc@...r.kernel.org, devicetree@...r.kernel.org,
	Kukjin Kim <kgene.kim@...sung.com>,
	Tomasz Figa <t.figa@...sung.com>,
	Thomas Abraham <ta.omasab@...il.com>,
	Andreas Farber <afaerber@...e.de>,
	Randy Dunlap <rdunlap@...radead.org>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>
Subject: Re: [PATCHv2 4/5] clk: samsung: exynos5410: Add fixed rate clocks

Hi Tomasz,

I perfectly see your point.
However my question was why you did you decide to postpone
Sylwester's? Was there any specific reason?
I suppose it would break all the dtb compatibility, but besides that,
was there any other reason?

Best,
Humberto

On Thu, Jul 31, 2014 at 2:53 PM, Tomasz Figa <tomasz.figa@...il.com> wrote:
> Hi Humberto,
>
> You can find my comments inline.
>
> On 31.07.2014 13:22, Humberto Silva Naves wrote:
>> This implements the fixed rate clocks generated either inside or
>> outside the SoC. It also adds a dt-binding constant for the
>> sclk_hdmiphy clock, which shall be later used by other drivers,
>> such as the DRM.
>>
>> Since the external fixed rate clock fin_pll is now registered by
>> the clk-exynos5410 file, the bindings with the device tree file have
>> changed. It is no longer needed to define fin_pll as a fixed clock,
>> such as in:
>>
>>       fin_pll: xxti {
>>               compatible = "fixed-clock";
>>               clock-frequency = <24000000>;
>>               clock-output-names = "fin_pll";
>>               #clock-cells = <0>;
>>       };
>>
>> The above lines should be replaced by the following lines:
>>
>>       fixed-rate-clocks {
>>               oscclk {
>>                       compatible = "samsung,exynos5410-oscclk";
>>                       clock-frequency = <24000000>;
>>               };
>>       };
>>
>> This new form of binding was properly documented in the relevant
>> documentation file.
>
> In general this is backwards. This Exynos-specific clock binding was
> invented before generic fixed rate clock binding showed up and so few
> drivers still use it to maintain DT ABI compatibility. However new
> drivers are required to use the new generic binding and so does the one
> for Exynos5410.
>
> Best regards,
> Tomasz
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/