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From: Mike Turquette <mturquette@linaro.org>
To: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>,
	"Wolfram Sang" <wsa@the-dreams.de>,
	"Geert Uytterhoeven" <geert+renesas@glider.be>
Cc: "Stephen Boyd" <sboyd@codeaurora.org>,
	"Laurent Pinchart" <laurent.pinchart@ideasonboard.com>,
	"Ulrich Hecht" <ulrich.hecht+renesas@gmail.com>,
	"Wolfram Sang" <wsa@sang-engineering.com>,
	linux-sh@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] clk: shmobile: div6: Avoid division by zero in .round_rate()
Date: Wed, 04 Feb 2015 14:01:52 -0800	[thread overview]
Message-ID: <20150204220152.421.38508@quantum> (raw)
In-Reply-To: <54D25AAA.8070904@cogentembedded.com>

Quoting Sergei Shtylyov (2015-02-04 09:45:14)
> Hello.
> 
> On 02/04/2015 08:32 PM, Wolfram Sang wrote:
> 
> >> Anyone may call clk_round_rate() with a zero rate value, so we have to
> >> protect against that.
> 
> >> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
> 
> > Acked-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
> 
> > I agree that this should not be fixed in the core because the fixup is
> > really driver dependant.
> 
>     Dunno, zero frequency seems generally insane to me.

It is useful to find the lowest frequency a clock can support. Basically
it is a search for the floor frequency.

Regards,
Mike

> 
> WBR, Sergei
> 

  reply	other threads:[~2015-02-04 22:02 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-02-04 12:27 [PATCH] clk: shmobile: div6: Avoid division by zero in .round_rate() Geert Uytterhoeven
2015-02-04 13:31 ` Sergei Shtylyov
2015-02-04 13:50   ` Laurent Pinchart
2015-02-04 17:32 ` Wolfram Sang
2015-02-04 17:45   ` Sergei Shtylyov
2015-02-04 22:01     ` Mike Turquette [this message]
2015-02-04 22:04       ` Sergei Shtylyov
2015-02-04 22:14         ` Sergei Shtylyov
2015-02-05 17:19           ` Laurent Pinchart
2015-02-05 17:46             ` Mike Turquette
2015-02-06 11:12             ` Sergei Shtylyov
2015-02-04 22:05   ` Mike Turquette

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