Message-ID: <54CFD33F.3000103@codeaurora.org>
Date: Mon, 02 Feb 2015 11:42:55 -0800
From: Stephen Boyd <sboyd@codeaurora.org>
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To: Heikki Krogerus <heikki.krogerus@linux.intel.com>,
        Mike Turquette <mturquette@linaro.org>
CC: linux-kernel@vger.kernel.org
Subject: Re: [PATCH] clk: fractional-divider: support for divider bypassing
References: <1422884224-21748-1-git-send-email-heikki.krogerus@linux.intel.com>
In-Reply-To: <1422884224-21748-1-git-send-email-heikki.krogerus@linux.intel.com>
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On 02/02/15 05:37, Heikki Krogerus wrote:
> If the divider or multiplier values values are 0 in the

s/values//

> register, bypassing the divider and returning the parent
> clock rate in clk_fd_recalc_rate().
>
> Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
> ---

Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>

>  drivers/clk/clk-fractional-divider.c | 3 +++
>  1 file changed, 3 insertions(+)
>
> diff --git a/drivers/clk/clk-fractional-divider.c b/drivers/clk/clk-fractional-divider.c
> index dc91da7..34d6c51 100644
> --- a/drivers/clk/clk-fractional-divider.c
> +++ b/drivers/clk/clk-fractional-divider.c
> @@ -36,6 +36,9 @@ static unsigned long clk_fd_recalc_rate(struct clk_hw *hw,
>  	m = (val & fd->mmask) >> fd->mshift;
>  	n = (val & fd->nmask) >> fd->nshift;
>  
> +	if (!n || !m)
> +		return parent_rate;
> +
>  	ret = (u64)parent_rate * m;
>  	do_div(ret, n);
>  


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