From mboxrd@z Thu Jan  1 00:00:00 1970
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From: Heiko Stuebner <heiko@sntech.de>
To: Elaine Zhang <zhangqing@rock-chips.com>
Cc: mturquette@baylibre.com, sboyd@codeaurora.org, linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org, linux-arm-kernel@lists.infradead.org, huangtao@rock-chips.com, cl@rock-chips.com, xxx@rock-chips.com, xf@rock-chips.com
Subject: Re: [PATCH 1/2] clk: fractional-divider: allow overriding of approximation
Date: Tue, 08 Aug 2017 17:58:22 +0200
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References: <1500624187-12165-1-git-send-email-zhangqing@rock-chips.com> <5990882.df1suBpf8V@phil> <5453089.AIzWDZk3ey@phil>
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Am Dienstag, 1. August 2017, 18:21:22 CEST schrieb Heiko Stuebner:
> From: Elaine Zhang <zhangqing@rock-chips.com>
> 
> Fractional dividers may have special requirements concerning numerator
> and denominator selection that differ from just getting the best
> approximation.
> 
> For example on Rockchip socs the denominator must be at least 20 times
> larger than the numerator to generate precise clock frequencies.
> 
> Therefore add the ability to provide custom approximation functions.
> 
> Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>

applied for 4.14 with Stephen's Ack


Heiko