linux-kernel - Re: [PATCH] clk: mvebu: update cpu clock frequency

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Message-ID: <55959D48.7090505@free-electrons.com>
Date:	Thu, 02 Jul 2015 22:21:28 +0200
From:	Gregory CLEMENT <gregory.clement@...e-electrons.com>
To:	Andrew Lunn <andrew@...n.ch>
CC:	Mike Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...eaurora.org>, linux-clk@...r.kernel.org,
	linux-kernel@...r.kernel.org, Jason Cooper <jason@...edaemon.net>,
	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	Ezequiel Garcia <ezequiel.garcia@...e-electrons.com>,
	linux-arm-kernel@...ts.infradead.org,
	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	Boris BREZILLON <boris.brezillon@...e-electrons.com>,
	Lior Amsalem <alior@...vell.com>,
	Tawfik Bayouk <tawfik@...vell.com>,
	Nadav Haklai <nadavh@...vell.com>
Subject: Re: [PATCH] clk: mvebu: update cpu clock frequency

Hi Andrew,

thanks for your prompt review

On 02/07/2015 22:04, Andrew Lunn wrote:
> On Thu, Jul 02, 2015 at 09:42:38PM +0200, Gregory CLEMENT wrote:
>> Since u-boot 2015_T1.0p6 there are new requency settings available.
> 
> Hi Gregory
> 
> Missing f in f_requency.

it must have been lost in the copy and paste I will fix it.

> 
> Also, what has u-boot got to do with this? I would expect this is a
> property of the hardware. What happens is an older u-boot is used?

As you probably know, a lot of "magical" initialization is done in the
U-boot from Marvell. So maybe is it the reason why u-boot was mentioned.
However you're right I will ask more information about especially if it
is safe to have this value with an older u-boot.

Thanks,

Gregory


> 
> Thanks
> 	Andrew
> 
>>
>> Based on a patch from Nadav Haklai <nadavh@...vell.com>
>>
>> Signed-off-by: Gregory CLEMENT <gregory.clement@...e-electrons.com>
>> ---
>>  drivers/clk/mvebu/armada-38x.c | 7 ++++---
>>  1 file changed, 4 insertions(+), 3 deletions(-)
>>
>> diff --git a/drivers/clk/mvebu/armada-38x.c b/drivers/clk/mvebu/armada-38x.c
>> index 8bccf4ecdab6..c64037e2e89f 100644
>> --- a/drivers/clk/mvebu/armada-38x.c
>> +++ b/drivers/clk/mvebu/armada-38x.c
>> @@ -46,10 +46,11 @@ static u32 __init armada_38x_get_tclk_freq(void __iomem *sar)
>>  }
>>  
>>  static const u32 armada_38x_cpu_frequencies[] __initconst = {
>> -	0, 0, 0, 0,
>> -	1066 * 1000 * 1000, 0, 0, 0,
>> +	666 * 1000 * 1000, 0, 800 * 1000 * 1000, 0,
>> +	1066 * 1000 * 1000, 0, 1200 * 1000 * 1000, 0,
>>  	1332 * 1000 * 1000, 0, 0, 0,
>> -	1600 * 1000 * 1000,
>> +	1600 * 1000 * 1000, 0, 0, 0,
>> +	1866 * 1000 * 1000, 0, 0, 2000 * 1000 * 1000,
>>  };
>>  
>>  static u32 __init armada_38x_get_cpu_freq(void __iomem *sar)
>> -- 
>> 2.1.0
>>


-- 
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
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