linux-kernel - Re: [PATCH v2 1/3] ARM: dts: berlin2q: add the Marvell Armada 1500 pro

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Message-ID: <20140314113202.GB3106@piout.net>
Date:	Fri, 14 Mar 2014 12:32:02 +0100
From:	Alexandre Belloni <alexandre.belloni@...e-electrons.com>
To:	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
Cc:	Antoine Ténart 
	<antoine.tenart@...e-electrons.com>, zmxu@...vell.com,
	jszhang@...vell.com, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/3] ARM: dts: berlin2q: add the Marvell Armada 1500
 pro

On 14/03/2014 at 10:31:55 +0100, Sebastian Hesselbarth wrote :
> On 03/13/2014 03:06 PM, Antoine Ténart wrote:
> >+		local-timer@...600 {
> >+			compatible = "arm,cortex-a9-twd-timer";
> >+			reg = <0xad0600 0x20>;
> >+			clocks = <&sysclk>;
> 
> If I understand Jisheng correctly, this should be cpuclk/3. When
> removing the clocks {} container above, please also take care of
> it.
> 

You understood correctly

> You can do
> 
> cpuclk: cpu-clock {
> 	compatible = "fixed-clock";
> 	#clock-cells = <0>;
> 	clock-frequency = <1200000000>; /* <- put correct freq here */
> };
> 
> sysclk: system-clock {
> 	compatible = "fixed-factor-clock";
> 	#clock-cells = <0>;
> 	clocks = <&cpuclk>;
> 	clock-multi = <1>;
> 	clock-div = <3>;
> };
> 
> Hopefully, we'll have proper clock drivers soon so we can just replace
> referenced "fixed-*" clocks.
> 

I'm working on that, do you have some code that you can share right now ?

-- 
Alexandre Belloni, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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