linux-kernel - RE: [PATCH 1/1] clk:aspeed:Fix AST2600 hpll calculate formula

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Date:   Wed, 1 Sep 2021 05:59:31 +0000
From:   Ryan Chen <ryan_chen@...eedtech.com>
To:     Stephen Boyd <sboyd@...nel.org>, Andrew Jeffery <andrew@...id.au>,
        Joel Stanley <joel@....id.au>,
        Michael Turquette <mturquette@...libre.com>,
        BMC-SW <BMC-SW@...eedtech.com>,
        "linux-clk@...r.kernel.org" <linux-clk@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 1/1] clk:aspeed:Fix AST2600 hpll calculate formula

> -----Original Message-----
> From: Stephen Boyd <sboyd@...nel.org>
> Sent: Sunday, August 29, 2021 12:37 PM
> To: Andrew Jeffery <andrew@...id.au>; Joel Stanley <joel@....id.au>; Michael
> Turquette <mturquette@...libre.com>; BMC-SW
> <BMC-SW@...eedtech.com>; linux-clk@...r.kernel.org;
> linux-kernel@...r.kernel.org; Ryan Chen <ryan_chen@...eedtech.com>
> Subject: Re: [PATCH 1/1] clk:aspeed:Fix AST2600 hpll calculate formula
> 
> Quoting Ryan Chen (2021-08-18 01:05:18)
> > AST2600 HPLL calculate formula [SCU200] HPLL Numerator(M): have fixed
> > value depend on SCU strap.
> > M = SCU500[10] ? 0x5F : SCU500[8] ? 0xBF : SCU200[12:0]
> >
> > if SCU500[10] = 1, M=0x5F.
> > else if SCU500[10]=0 & SCU500[8]=1, M=0xBF.
> > others (SCU510[10]=0 and SCU510[8]=0)
> > depend on SCU200[12:0] (default 0x8F) register setting.
> >
> > HPLL Denumerator (N) =  SCU200[18:13] (default 0x2)
> > HPLL Divider (P)         =      SCU200[22:19] (default 0x0)
> >
> > Signed-off-by: Ryan Chen <ryan_chen@...eedtech.com>
> 
> Any Fixes tag? Joel, can you review?

Hello Joel,

Should I apply to this tag? d3d04f6c330a