linux-kernel - Re: [PATCH 2/2] devfreq: exynos4: Support initialization of freq_table and max

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Date:	Fri, 24 Aug 2012 00:22:04 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Jonghwa Lee <jonghwa3.lee@...sung.com>
Cc:	linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
	Kyungmin Park <kyungmin.park@...sung.com>,
	MyungJoo Ham <myungjoo.ham@...sung.com>,
	Mike Turquette <mturquette@...com>,
	Xiaoguang Chen <chenxg@...vell.com>
Subject: Re: [PATCH 2/2] devfreq: exynos4: Support initialization of freq_table and max_state of devfreq's profile.

On Thursday, August 16, 2012, Jonghwa Lee wrote:
> This patch initializes freq_table and max_state of devfreq's profile.
> They will be used for creating transition table.
> 
> Signed-off-by: Jonghwa Lee <jonghwa3.lee@...sung.com>

Does that depend on [1/2]?

Rafael


> ---
>  drivers/devfreq/exynos4_bus.c |   30 +++++++++++++++++++++++++++++-
>  1 files changed, 29 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/devfreq/exynos4_bus.c b/drivers/devfreq/exynos4_bus.c
> index 88ddc77..9c08855 100644
> --- a/drivers/devfreq/exynos4_bus.c
> +++ b/drivers/devfreq/exynos4_bus.c
> @@ -985,7 +985,8 @@ static __devinit int exynos4_busfreq_probe(struct platform_device *pdev)
>  	struct busfreq_data *data;
>  	struct opp *opp;
>  	struct device *dev = &pdev->dev;
> -	int err = 0;
> +	int err = 0, i;
> +	unsigned int *freq_table;
>  
>  	data = kzalloc(sizeof(struct busfreq_data), GFP_KERNEL);
>  	if (data == NULL) {
> @@ -1042,6 +1043,33 @@ static __devinit int exynos4_busfreq_probe(struct platform_device *pdev)
>  
>  	platform_set_drvdata(pdev, data);
>  
> +	switch (data->type) {
> +	case TYPE_BUSF_EXYNOS4210:
> +		freq_table = devm_kzalloc(&pdev->dev, sizeof(unsigned int) * EX4210_LV_NUM,
> +					GFP_KERNEL);
> +
> +		for (i = 0; i < EX4210_LV_NUM; i++)
> +			freq_table[i] = exynos4210_busclk_table[i].clk;
> +
> +		exynos4_devfreq_profile.max_state = EX4210_LV_NUM;
> +		break;
> +	case TYPE_BUSF_EXYNOS4x12:
> +		freq_table = devm_kzalloc(&pdev->dev, sizeof(unsigned int) * EX4x12_LV_NUM,
> +					GFP_KERNEL);
> +
> +		for (i = 0; i < EX4x12_LV_NUM; i++)
> +			freq_table[i] = exynos4x12_mifclk_table[i].clk;
> +
> +		exynos4_devfreq_profile.max_state = EX4x12_LV_NUM;
> +		break;
> +	default:
> +		dev_err(dev, "Cannot determine the device id %d\n", data->type);
> +		err = -EINVAL;
> +		goto err_opp_add;
> +	}
> +
> +	exynos4_devfreq_profile.freq_table = freq_table;
> +
>  	busfreq_mon_reset(data);
>  
>  	data->devfreq = devfreq_add_device(dev, &exynos4_devfreq_profile,
> 

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