linux-kernel - Re: [PATCH v4 19/20] clk: tegra210: add support for Tegra210 clocks

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Message-ID: <554A4D82.80307@nvidia.com>
Date:	Wed, 6 May 2015 13:21:06 -0400
From:	Rhyland Klein <rklein@...dia.com>
To:	Thierry Reding <thierry.reding@...il.com>,
	Peter De Schrijver <pdeschrijver@...dia.com>
CC:	Mike Turquette <mturquette@...aro.org>,
	Stephen Warren <swarren@...dotorg.org>,
	Stephen Boyd <sboyd@...eaurora.org>,
	Alexandre Courbot <gnurou@...il.com>,
	<linux-clk@...r.kernel.org>, <linux-tegra@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 19/20] clk: tegra210: add support for Tegra210 clocks

On 5/6/2015 10:51 AM, Thierry Reding wrote:
> * PGP Signed by an unknown key
> 
> On Mon, May 04, 2015 at 12:37:39PM -0400, Rhyland Klein wrote:
> [...]
>> diff --git a/drivers/clk/tegra/clk-tegra210.c b/drivers/clk/tegra/clk-tegra210.c
> [...]
>> +static struct div_nmp plld_nmp = {
>> +	.divm_shift = 0,
>> +	.divm_width = 8,
>> +	.divn_shift = 11,
>> +	.divn_width = 8,
>> +	.divp_shift = 20,
>> +	.divp_width = 3,
>> +};
> 
> I think we need to add the SDM shift and width fields here:
> 
> 	.sdm_shift = 0,
> 	.sdm_width = 16,
> 
> Otherwise pll_d can't take advantage of the fractional divider.
> 
Actually, sdm_shift/width aren't used. I originally added them to handle
SDM data, but eventually I switched to using a reg/mask combo. So this
isn't needed.

-rhyland


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