linux-kernel - Re: [PATCH 12/13] thermal: convert tegra_thermal to use devm_thermal_zone_of_sensor

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Date:	Thu, 10 Mar 2016 16:46:55 +0800
From:	Wei Ni <wni@...dia.com>
To:	Eduardo Valentin <edubezval@...il.com>,
	Rui Zhang <rui.zhang@...el.com>
CC:	Linux PM <linux-pm@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>, <lm-sensors@...sensors.org>,
	Stephen Warren <swarren@...dotorg.org>,
	"Thierry Reding" <thierry.reding@...il.com>,
	Alexandre Courbot <gnurou@...il.com>,
	<linux-tegra@...r.kernel.org>
Subject: Re: [PATCH 12/13] thermal: convert tegra_thermal to use devm_thermal_zone_of_sensor_register



On 2016年03月10日 05:35, Eduardo Valentin wrote:
> This changes the driver to use the devm_ version
> of thermal_zone_of_sensor_register and cleans
> up the  local points and unregister calls.
> 
> Cc: Zhang Rui <rui.zhang@...el.com>
> Cc: Stephen Warren <swarren@...dotorg.org>
> Cc: Thierry Reding <thierry.reding@...il.com>
> Cc: Alexandre Courbot <gnurou@...il.com>
> Cc: linux-pm@...r.kernel.org
> Cc: linux-tegra@...r.kernel.org
> Cc: linux-kernel@...r.kernel.org
> Signed-off-by: Eduardo Valentin <edubezval@...il.com>
> ---
>  drivers/thermal/tegra_soctherm.c | 31 +++++++++----------------------
>  1 file changed, 9 insertions(+), 22 deletions(-)
> 
> diff --git a/drivers/thermal/tegra_soctherm.c b/drivers/thermal/tegra_soctherm.c
> index 74ea576..0018ccd 100644
> --- a/drivers/thermal/tegra_soctherm.c
> +++ b/drivers/thermal/tegra_soctherm.c
> @@ -168,7 +168,7 @@ struct tegra_soctherm {
>  	struct clk *clock_soctherm;
>  	void __iomem *regs;
>  
> -	struct thermal_zone_device *thermctl_tzs[4];
> +#define ZONE_NUMBER		4
>  };
>  
>  struct tsensor_shared_calibration {
> @@ -342,7 +342,7 @@ static const struct thermctl_zone_desc t124_thermctl_temp_zones[] = {
>  static int tegra_soctherm_probe(struct platform_device *pdev)
>  {
>  	struct tegra_soctherm *tegra;
> -	struct thermal_zone_device *tz;
> +	struct thermal_zone_device *z;
>  	struct tsensor_shared_calibration shared_calib;
>  	struct resource *res;
>  	unsigned int i;
> @@ -408,36 +408,29 @@ static int tegra_soctherm_probe(struct platform_device *pdev)
>  
>  	/* Initialize thermctl sensors */
>  
> -	for (i = 0; i < ARRAY_SIZE(tegra->thermctl_tzs); ++i) {
> +	for (i = 0; i < ZONE_NUMBER; ++i) {
>  		struct tegra_thermctl_zone *zone =
>  			devm_kzalloc(&pdev->dev, sizeof(*zone), GFP_KERNEL);
>  		if (!zone) {
>  			err = -ENOMEM;
> -			goto unregister_tzs;
> +			goto disable_clocks;
>  		}
>  
>  		zone->reg = tegra->regs + t124_thermctl_temp_zones[i].offset;
>  		zone->shift = t124_thermctl_temp_zones[i].shift;
>  
> -		tz = thermal_zone_of_sensor_register(&pdev->dev, i, zone,
> -						     &tegra_of_thermal_ops);
> -		if (IS_ERR(tz)) {
> -			err = PTR_ERR(tz);
> +		z = devm_thermal_zone_of_sensor_register(&pdev->dev, i, zone,

I prefer to still use "tz", it seems this line isn't over 80 characters, or we
can add newline.

> +							 &tegra_of_thermal_ops);
> +		if (IS_ERR(z)) {
> +			err = PTR_ERR(z);
>  			dev_err(&pdev->dev, "failed to register sensor: %d\n",
>  				err);
> -			goto unregister_tzs;
> +			goto disable_clocks;
>  		}
> -
> -		tegra->thermctl_tzs[i] = tz;
>  	}
>  
>  	return 0;
>  
> -unregister_tzs:
> -	while (i--)
> -		thermal_zone_of_sensor_unregister(&pdev->dev,
> -						  tegra->thermctl_tzs[i]);
> -
>  disable_clocks:
>  	clk_disable_unprepare(tegra->clock_tsensor);
>  	clk_disable_unprepare(tegra->clock_soctherm);
> @@ -448,12 +441,6 @@ disable_clocks:
>  static int tegra_soctherm_remove(struct platform_device *pdev)
>  {
>  	struct tegra_soctherm *tegra = platform_get_drvdata(pdev);
> -	unsigned int i;
> -
> -	for (i = 0; i < ARRAY_SIZE(tegra->thermctl_tzs); ++i) {
> -		thermal_zone_of_sensor_unregister(&pdev->dev,
> -						  tegra->thermctl_tzs[i]);
> -	}
>  
>  	clk_disable_unprepare(tegra->clock_tsensor);
>  	clk_disable_unprepare(tegra->clock_soctherm);
>