linux-kernel - Re: [PATCH] clk: imx: Fix fractional clock set rate computation

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Message-ID: <154835746984.136743.9264573972712062567@swboyd.mtv.corp.google.com>
Date:   Thu, 24 Jan 2019 11:17:49 -0800
From:   Stephen Boyd <sboyd@...nel.org>
To:     Abel Vesa <abel.vesa@....com>, Lucas Stach <l.stach@...gutronix.de>
Cc:     Abel Vesa <abel.vesa@....com>, Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <fabio.estevam@....com>,
        dl-linux-imx <linux-imx@....com>,
        Michael Turquette <mturquette@...libre.com>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        "open list:COMMON CLK FRAMEWORK" <linux-clk@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] clk: imx: Fix fractional clock set rate computation

Quoting Abel Vesa (2019-01-18 04:54:13)
> Before multiplying by PLL_FRAC_DENOM, the temp64 needs to be
>  temp64 = rate * 2 - divfi * parent_rate * 8, instead of:
>  temp64 = (rate * 2 - divfi) * parent_rate
> 
> Fixes: 6209624b9a5c1e ("clk: imx: Add fractional PLL output clock")
> Signed-off-by: Abel Vesa <abel.vesa@....com>
> ---

Applied to clk-fixes