linux-kernel - Re: [PATCH] clk: qcom: Use parent rate when set rate to pixel RCG clock

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Date:	Fri, 26 Jun 2015 16:16:16 +0530
From:	Archit Taneja <architt@...eaurora.org>
To:	Hai Li <hali@...eaurora.org>, linux-kernel@...r.kernel.org,
	sboyd@...eaurora.org
CC:	mturquette@...aro.org, georgi.djakov@...aro.org,
	tomeu.vizoso@...labora.com
Subject: Re: [PATCH] clk: qcom: Use parent rate when set rate to pixel RCG
 clock



On 06/26/2015 04:05 AM, Hai Li wrote:
> Since the parent rate has been recalculated, pixel RCG clock
> should rely on it to find the correct M/N values during set_rate,
> instead of calling __clk_round_rate() to its parent again.

Tested-by: Archit Taneja <architt@...eaurora.org>

>
> Signed-off-by: Hai Li <hali@...eaurora.org>
> ---
>   drivers/clk/qcom/clk-rcg2.c | 3 ++-
>   1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/clk/qcom/clk-rcg2.c b/drivers/clk/qcom/clk-rcg2.c
> index 4d3e2f7..b344899 100644
> --- a/drivers/clk/qcom/clk-rcg2.c
> +++ b/drivers/clk/qcom/clk-rcg2.c
> @@ -615,10 +615,11 @@ static int clk_pixel_set_rate(struct clk_hw *hw, unsigned long rate,
>   	if (!parent)
>   		return -EINVAL;
>
> +	src_rate = parent_rate;
> +
>   	for (; frac->num; frac++) {
>   		request = (rate * frac->den) / frac->num;
>
> -		src_rate = __clk_round_rate(parent, request);
>   		if ((src_rate < (request - delta)) ||
>   			(src_rate > (request + delta)))
>   			continue;
>

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