linux-kernel - Re: [PATCH] clk: bcm2835: Correct the prediv logic

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Date:   Mon, 15 May 2017 19:47:39 +0200 (CEST)
From:   Stefan Wahren <stefan.wahren@...e.com>
To:     Lee Jones <lee@...nel.org>, Eric Anholt <eric@...olt.net>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...eaurora.org>,
        Florian Fainelli <f.fainelli@...il.com>
Cc:     Phil Elwell <phil@...pberrypi.org>, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        bcm-kernel-feedback-list@...adcom.com,
        linux-rpi-kernel@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] clk: bcm2835: Correct the prediv logic

Hi Eric,

> Eric Anholt <eric@...olt.net> hat am 15. Mai 2017 um 19:35 geschrieben:
> 
> 
> From: Phil Elwell <phil@...pberrypi.org>
> 
> If a clock has the prediv flag set, both the integer and fractional
> parts must be scaled when calculating the resulting frequency.
> 
> Signed-off-by: Phil Elwell <phil@...pberrypi.org>
> Signed-off-by: Eric Anholt <eric@...olt.net>
> ---
> 
> While this is a bugfix, I haven't put a "Fixes:" line in here to get
> it automatically backported to stable.  

sorry, i can't follow. How should this happen without "Fixes: "?

> We had trouble with the
> out-of-tree DSI panel driver, at least: Our old set_rate() didn't
> work, because the new PLL was just barely too fast to get the integer
> PLL divider we needed.  We may run into similar troubles
> elsewhere. --anholt
>