linux-kernel - RE: [PATCH v2 3/4] clk: samsung: clk-pll: Add support for pll

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Message-ID: <015601dad271$bcd53e00$367fba00$@samsung.com>
Date: Wed, 10 Jul 2024 08:04:47 +0530
From: "Alim Akhtar" <alim.akhtar@...sung.com>
To: "'sunyeal.hong'" <sunyeal.hong@...sung.com>, "'Krzysztof Kozlowski'"
	<krzk@...nel.org>, "'Sylwester Nawrocki'" <s.nawrocki@...sung.com>,
	"'Chanwoo Choi'" <cw00.choi@...sung.com>, "'Michael Turquette'"
	<mturquette@...libre.com>, "'Stephen Boyd'" <sboyd@...nel.org>, "'Rob
 Herring'" <robh@...nel.org>, "'Conor Dooley'" <conor+dt@...nel.org>
Cc: <linux-samsung-soc@...r.kernel.org>, <linux-clk@...r.kernel.org>,
	<devicetree@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v2 3/4] clk: samsung: clk-pll: Add support for pll_531x

Hello Sunyeal,

> -----Original Message-----
> From: sunyeal.hong <sunyeal.hong@...sung.com>
> Sent: Wednesday, July 10, 2024 7:50 AM
> To: 'Alim Akhtar' <alim.akhtar@...sung.com>; 'Krzysztof Kozlowski'
> <krzk@...nel.org>; 'Sylwester Nawrocki' <s.nawrocki@...sung.com>;
> 'Chanwoo Choi' <cw00.choi@...sung.com>; 'Michael Turquette'
> <mturquette@...libre.com>; 'Stephen Boyd' <sboyd@...nel.org>; 'Rob
> Herring' <robh@...nel.org>; 'Conor Dooley' <conor+dt@...nel.org>
> Cc: linux-samsung-soc@...r.kernel.org; linux-clk@...r.kernel.org;
> devicetree@...r.kernel.org; linux-arm-kernel@...ts.infradead.org; linux-
> kernel@...r.kernel.org
> Subject: RE: [PATCH v2 3/4] clk: samsung: clk-pll: Add support for pll_531x
> 
> Hello Alim,
> 
> > -----Original Message-----
> > From: Alim Akhtar <alim.akhtar@...sung.com>
> > Sent: Monday, July 8, 2024 8:58 PM
> > To: 'Sunyeal Hong' <sunyeal.hong@...sung.com>; 'Krzysztof Kozlowski'
> > <krzk@...nel.org>; 'Sylwester Nawrocki' <s.nawrocki@...sung.com>;
> > 'Chanwoo Choi' <cw00.choi@...sung.com>; 'Michael Turquette'
> > <mturquette@...libre.com>; 'Stephen Boyd' <sboyd@...nel.org>; 'Rob
> > Herring' <robh@...nel.org>; 'Conor Dooley' <conor+dt@...nel.org>
> > Cc: linux-samsung-soc@...r.kernel.org; linux-clk@...r.kernel.org;
> > devicetree@...r.kernel.org; linux-arm-kernel@...ts.infradead.org;
> > linux- kernel@...r.kernel.org
> > Subject: RE: [PATCH v2 3/4] clk: samsung: clk-pll: Add support for
> > pll_531x
> >
> > Hello Sunyeal,
> >
> > > -----Original Message-----
> > > From: Sunyeal Hong <sunyeal.hong@...sung.com>
> > > Sent: Monday, July 8, 2024 4:44 AM
> > > To: Krzysztof Kozlowski <krzk@...nel.org>; Sylwester Nawrocki
> > > <s.nawrocki@...sung.com>; Chanwoo Choi
> <cw00.choi@...sung.com>; Alim
> > > Akhtar <alim.akhtar@...sung.com>; Michael Turquette
> > > <mturquette@...libre.com>; Stephen Boyd <sboyd@...nel.org>; Rob
> > > Herring <robh@...nel.org>; Conor Dooley <conor+dt@...nel.org>
> > > Cc: linux-samsung-soc@...r.kernel.org; linux-clk@...r.kernel.org;
> > > devicetree@...r.kernel.org; linux-arm-kernel@...ts.infradead.org;
> > > linux- kernel@...r.kernel.org; Sunyeal Hong
> > > <sunyeal.hong@...sung.com>
> > > Subject: [PATCH v2 3/4] clk: samsung: clk-pll: Add support for
> > > pll_531x
> > >
> > > pll531x PLL is used in Exynos Auto v920 SoC for shared pll.
> > > pll531x: Integer/fractional PLL with mid frequency FVCO (800 to 3120
> > > MHz)
> > >
> > > PLL531x
> > > FOUT = (MDIV + F/2^32-F[31]) * FIN/(PDIV x 2^SDIV)
> > >
> > Any reason for not mentioning equation for integer PLL?
> >
> If the F value is 0, it operates as an integer PLL.
Thanks for clarification, it is good to mention the same in the commit message. 

[snip]
> > > --
> > > 2.45.2
> >
>