linux-kernel - Re: [PATCH 1/2] clk: fractional-divider: allow overriding of approximation

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Message-ID: <20170807230230.GY2146@codeaurora.org>
Date:   Mon, 7 Aug 2017 16:02:30 -0700
From:   Stephen Boyd <sboyd@...eaurora.org>
To:     Heiko Stuebner <heiko@...ech.de>
Cc:     Elaine Zhang <zhangqing@...k-chips.com>, mturquette@...libre.com,
        linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-rockchip@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, huangtao@...k-chips.com,
        cl@...k-chips.com, xxx@...k-chips.com, xf@...k-chips.com
Subject: Re: [PATCH 1/2] clk: fractional-divider: allow overriding of
 approximation

On 08/01, Heiko Stuebner wrote:
> From: Elaine Zhang <zhangqing@...k-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@...k-chips.com>
> ---

Acked-by: Stephen Boyd <sboyd@...eaurora.org>

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