linux-kernel - Re: [PATCH v2 3/5] clk: aspeed: Add platform driver and register PLLs

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Date:   Thu, 28 Sep 2017 14:29:22 +1000
From:   Joel Stanley <joel@....id.au>
To:     Andrew Jeffery <andrew@...id.au>
Cc:     Lee Jones <lee.jones@...aro.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...eaurora.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-clk@...r.kernel.org,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Jeremy Kerr <jk@...abs.org>,
        Rick Altherr <raltherr@...gle.com>,
        Ryan Chen <ryan_chen@...eedtech.com>,
        Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCH v2 3/5] clk: aspeed: Add platform driver and register PLLs

On Wed, Sep 27, 2017 at 5:34 PM, Andrew Jeffery <andrew@...id.au> wrote:
> On Wed, 2017-09-27 at 16:13 +1000, Joel Stanley wrote:
>> > > +                     div_table,
>> >
>> > This doesn't seem to be correct. There's the problem of 0b000 and 0b001 mapping
>> > the same value of 2 for the AST2500, whose table then increments in steps of 1.
>> > The AST2400 mapping on the otherhand is multiples of 2 starting at 2, with no
>> > inconsistency for 0b000 vs 0b001.
>>
>> Yep, we do use a different table for ast2400 vs ast2500. See
>> ast2400_div_table vs ast2500_div_table.
>
> Yep, but for the AST2500 this is a different table again to what you've
> already defined (for the AST2500). However, for the AST2400 the table
> looks the same as the other AST2400 tables.

You're right. I didn't realise you were pointing out something strange
about eclk.

I added another table for eclk, and the correct one is selected by the
platform data.

I'll send out v4 today if no more reviews come in.