linux-kernel - Re: [PATCH v2 05/14] clk: imx: pfdv2: determine best parent rate

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Message-ID: <20200310060434.GH15729@dragon>
Date:   Tue, 10 Mar 2020 14:04:35 +0800
From:   Shawn Guo <shawnguo@...nel.org>
To:     peng.fan@....com
Cc:     s.hauer@...gutronix.de, sboyd@...nel.org, robh+dt@...nel.org,
        viresh.kumar@...aro.org, rjw@...ysocki.net, kernel@...gutronix.de,
        festevam@...il.com, linux-imx@....com, Anson.Huang@....com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        abel.vesa@....com
Subject: Re: [PATCH v2 05/14] clk: imx: pfdv2: determine best parent rate

On Wed, Feb 19, 2020 at 03:59:48PM +0800, peng.fan@....com wrote:
> From: Peng Fan <peng.fan@....com>
> 
> pfdv2 is only used in i.MX7ULP. To get best pfd output, the i.MX7ULP
> Datasheet defines two best PLL rate and pfd frac.
> 
> Per Datasheel
> All PLLs on i.MX 7ULP either have VCO base frequency of
> 480 MHz or 528 MHz. So when determine best rate, we also
> determine best parent rate which could match the requirement.
> 
> For some reason the current parent might not be 480MHz or 528MHz,
> so we still take current parent rate as a choice.
> 
> And we also enable flag CLK_SET_RATE_PARENT to let parent rate
> to be configured.
> 
> Signed-off-by: Peng Fan <peng.fan@....com>

Applied, thanks.