linux-kernel - RE: [PATCHv2] clk:aspeed:Fix AST2600 hpll calculate formula

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Message-ID: <HK0PR06MB338054B6C48B751A9E5FE5D0F2DB9@HK0PR06MB3380.apcprd06.prod.outlook.com>
Date:   Wed, 15 Sep 2021 03:11:30 +0000
From:   Ryan Chen <ryan_chen@...eedtech.com>
To:     Joel Stanley <joel@....id.au>
CC:     Stephen Boyd <sboyd@...nel.org>,
        "Claudiu.Beznea@...rochip.com" <Claudiu.Beznea@...rochip.com>,
        "andrew@...id.au" <andrew@...id.au>,
        "linux-clk@...r.kernel.org" <linux-clk@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "mturquette@...libre.com" <mturquette@...libre.com>
Subject: RE: [PATCHv2] clk:aspeed:Fix AST2600 hpll calculate formula

> -----Original Message-----
> From: Joel Stanley <joel@....id.au>
> Sent: Wednesday, September 15, 2021 11:07 AM
> To: Ryan Chen <ryan_chen@...eedtech.com>
> Cc: Stephen Boyd <sboyd@...nel.org>; Claudiu.Beznea@...rochip.com;
> andrew@...id.au; linux-clk@...r.kernel.org; linux-kernel@...r.kernel.org;
> mturquette@...libre.com
> Subject: Re: [PATCHv2] clk:aspeed:Fix AST2600 hpll calculate formula
> 
> On Wed, 15 Sept 2021 at 02:52, Ryan Chen <ryan_chen@...eedtech.com>
> wrote:
> >
> > > -----Original Message-----
> > > From: Stephen Boyd <sboyd@...nel.org>
> > > Sent: Wednesday, September 15, 2021 9:17 AM
> > > To: Claudiu.Beznea@...rochip.com; Ryan Chen
> > > <ryan_chen@...eedtech.com>; andrew@...id.au; joel@....id.au;
> > > linux-clk@...r.kernel.org; linux-kernel@...r.kernel.org;
> > > mturquette@...libre.com
> > > Subject: RE: [PATCHv2] clk:aspeed:Fix AST2600 hpll calculate formula
> > >
> > > Quoting Ryan Chen (2021-09-12 22:31:46)
> > > > > > +               if (hwstrap & BIT(10))
> > > > > > +                       m = 0x5F;
> > > > > > +               else {
> > > > > > +                       if (hwstrap & BIT(8))
> > > > >
> > > > > You may write it directly:
> > > > >                 else if (hwstrap & BIT(8))
> > > > >
> > > > Hello,
> > > >         Like I commit message M = SCU500[10] ? 0x5F : SCU500[8] ?
> 0xBF :
> > > SCU200[12:0]
> > > >         it need keep from register read, if BIT(8)/BIT(10) not 1.
> > > >
> > >
> > > I don't get it. The review comment was that the else { if (...) can
> > > be collapsed into an else if (..) What does commit message have to do with
> it?
> > Sorry for confuse.
> > Or do you mean like following modification?
> >
> >                if (hwstrap & BIT(10))
> >                        m = 0x5F;
> >                else if (hwstrap & BIT(8))
> >                        m = 0xBF;
> 
> Yep!
> 
> Take a look at my review of v1. I wrote it out there.
Got it will modify by this.