Message-ID: <54382F69.3060607@broadcom.com>
Date: Fri, 10 Oct 2014 12:11:37 -0700
From: Scott Branden <sbranden@broadcom.com>
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To: Arnd Bergmann <arnd@arndb.de>
CC: Christian Daudt <bcm@fixthebug.org>, Matt Porter <mporter@linaro.org>,
        Russell King <linux@arm.linux.org.uk>,
        <bcm-kernel-feedback-list@broadcom.com>,
        Mike Turquette <mturquette@linaro.org>, Alex Elder <elder@linaro.org>,
        Rob Herring <robh+dt@kernel.org>, Pawel Moll <pawel.moll@arm.com>,
        Mark Rutland <mark.rutland@arm.com>,
        Ian Campbell <ijc+devicetree@hellion.org.uk>,
        "Kumar Gala" <galak@codeaurora.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        "David S. Miller" <davem@davemloft.net>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Joe Perches <joe@perches.com>,
        "Mauro Carvalho Chehab" <m.chehab@samsung.com>,
        Antti Palosaari <crope@iki.fi>, JD Zheng <jdzheng@broadcom.com>,
        Ray Jui <rjui@broadcom.com>, <linux-arm-kernel@lists.infradead.org>,
        <linux-kernel@vger.kernel.org>, <devicetree@vger.kernel.org>,
        Jonathan Richardson <jonathar@broadcom.com>
Subject: Re: [PATCH V4 5/7] ARM: dts: Enable Broadcom Cygnus SoC
References: <1412894671-5921-6-git-send-email-sbranden@broadcom.com> <6003834.vKPhBNUdsz@wuerfel>
In-Reply-To: <6003834.vKPhBNUdsz@wuerfel>
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Sender: linux-kernel-owner@vger.kernel.org

On 14-10-10 03:08 AM, Arnd Bergmann wrote:
> On Thursday 09 October 2014 15:44:29 Scott Branden wrote:
>> +
>> +               lcpll: lcpll@0301d02c {
>> +                       #clock-cells = <0>;
>> +                       compatible = "brcm,cygnus-lcpll-clk";
>> +                       reg = <0x0301d02c 0x1c>;
>> +                       clocks = <&osc>;
>> +               };
>> +
>> +               genpll: genpll@0301d000 {
>> +                       #clock-cells = <0>;
>> +                       compatible = "brcm,cygnus-genpll-clk";
>> +                       reg = <0x0301d000 0x2c>,
>> +                                 <0x180AA024 0x4>,
>> +                                 <0x0301C020 0x4>;
>> +                       clocks = <&osc>;
>> +               };
>> +
>
> To be honest, I'm not too happy about the way you specify a single
> register for each clock as a global 'reg' property.
I'm not happy with this either.  Will rework.
>
> Presumably each of these registers is part of an IP block that does
> multiple things, so it would be better to start out with a binding
> for each IP block. How many of these blocks are used for clocks, and
> what do they do?
Clocks are a little scattered in the chip and don't make a lot of sense 
for easy software programming.  Will look at how to change bindings so 
they are flexible to work on other generations.
>
> 	Arnd
>

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