linux-kernel - Re: [PATCH 07/10] thermal: exynos: simplify temp_to_code() and code_to

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Date:	Mon, 19 May 2014 11:24:24 +0530
From:	Amit Kachhap <amit.kachhap@...il.com>
To:	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Cc:	Eduardo Valentin <eduardo.valentin@...com>,
	Zhang Rui <rui.zhang@...el.com>,
	Tomasz Figa <t.figa@...sung.com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	linux-samsung-soc@...r.kernel.org, linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 07/10] thermal: exynos: simplify temp_to_code() and code_to_temp()

On 5/5/14, Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com> wrote:
> * Remove dead temp check from temp_to_code() (this function users
>   in exynos_tmu_initialize() always pass correct temperatures and
>   exynos_tmu_set_emulation() returns early for EXYNOS4210 because
>   TMU_SUPPORT_EMULATION flag is not set on this SoC).
>
> * Move temp_code check from code_to_temp() to exynos_tmu_read()
>   (code_to_temp() only user).
>
> There should be no functional changes caused by this patch.
>
> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>

Changes looks fine.
Reviewed-by: Amit Daniel Kachhap<amit.daniel@...sung.com>

> ---
>  drivers/thermal/samsung/exynos_tmu.c | 38
> +++++++++++-------------------------
>  1 file changed, 11 insertions(+), 27 deletions(-)
>
> diff --git a/drivers/thermal/samsung/exynos_tmu.c
> b/drivers/thermal/samsung/exynos_tmu.c
> index a415829..20379eb 100644
> --- a/drivers/thermal/samsung/exynos_tmu.c
> +++ b/drivers/thermal/samsung/exynos_tmu.c
> @@ -71,19 +71,7 @@ struct exynos_tmu_data {
>   */
>  static int temp_to_code(struct exynos_tmu_data *data, u8 temp)
>  {
> -	struct exynos_tmu_platform_data *pdata = data->pdata;
> -	int temp_code;
> -
> -	if (data->soc == SOC_ARCH_EXYNOS4210)
> -		/* temp should range between 25 and 125 */
> -		if (temp < 25 || temp > 125) {
> -			temp_code = -EINVAL;
> -			goto out;
> -		}
> -
> -	temp_code = temp + data->temp_error - pdata->first_point_trim;
> -out:
> -	return temp_code;
> +	return temp + data->temp_error - data->pdata->first_point_trim;
>  }
>
>  /*
> @@ -92,19 +80,7 @@ out:
>   */
>  static int code_to_temp(struct exynos_tmu_data *data, u8 temp_code)
>  {
> -	struct exynos_tmu_platform_data *pdata = data->pdata;
> -	int temp;
> -
> -	if (data->soc == SOC_ARCH_EXYNOS4210)
> -		/* temp_code should range between 75 and 175 */
> -		if (temp_code < 75 || temp_code > 175) {
> -			temp = -ENODATA;
> -			goto out;
> -		}
> -
> -	temp = temp_code - data->temp_error + pdata->first_point_trim;
> -out:
> -	return temp;
> +	return temp_code - data->temp_error + data->pdata->first_point_trim;
>  }
>
>  static int exynos_tmu_initialize(struct platform_device *pdev)
> @@ -297,8 +273,16 @@ static int exynos_tmu_read(struct exynos_tmu_data
> *data)
>  	clk_enable(data->clk);
>
>  	temp_code = readb(data->base + reg->tmu_cur_temp);
> -	temp = code_to_temp(data, temp_code);
>
> +	if (data->soc == SOC_ARCH_EXYNOS4210)
> +		/* temp_code should range between 75 and 175 */
> +		if (temp_code < 75 || temp_code > 175) {
> +			temp = -ENODATA;
> +			goto out;
> +		}
> +
> +	temp = code_to_temp(data, temp_code);
> +out:
>  	clk_disable(data->clk);
>  	mutex_unlock(&data->lock);
>
> --
> 1.8.2.3
>
> --
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