linux-kernel - Re: [PATCH v2 04/10] pinctrl: sunxi: Prepare for building SoC specific drivers as modules

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Date:	Sun, 17 May 2015 16:19:22 +0200
From:	Maxime Ripard <maxime.ripard@...e-electrons.com>
To:	Jens Kuske <jenskuske@...il.com>
Cc:	Emilio López <emilio@...pez.com.ar>,
	Mike Turquette <mturquette@...aro.org>,
	Linus Walleij <linus.walleij@...aro.org>,
	Rob Herring <robh+dt@...nel.org>, Chen-Yu Tsai <wens@...e.org>,
	Vishnu Patekar <vishnupatekar0510@...il.com>,
	Hans de Goede <hdegoede@...hat.com>,
	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, linux-sunxi@...glegroups.com
Subject: Re: [PATCH v2 04/10] pinctrl: sunxi: Prepare for building SoC
 specific drivers as modules

On Fri, May 15, 2015 at 06:38:54PM +0200, Jens Kuske wrote:
> Add a remove function and export the init and remove function
> to allow us to build the SoC specific drivers as modules.
> 
> Signed-off-by: Jens Kuske <jenskuske@...il.com>
> ---
>  drivers/pinctrl/sunxi/pinctrl-sunxi.c | 25 +++++++++++++++++++------
>  drivers/pinctrl/sunxi/pinctrl-sunxi.h |  2 ++
>  2 files changed, 21 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/pinctrl/sunxi/pinctrl-sunxi.c b/drivers/pinctrl/sunxi/pinctrl-sunxi.c
> index f8e171b..4ef6b3d 100644
> --- a/drivers/pinctrl/sunxi/pinctrl-sunxi.c
> +++ b/drivers/pinctrl/sunxi/pinctrl-sunxi.c
> @@ -856,7 +856,6 @@ int sunxi_pinctrl_init(struct platform_device *pdev,
>  	struct sunxi_pinctrl *pctl;
>  	struct resource *res;
>  	int i, ret, last_pin;
> -	struct clk *clk;
>  
>  	pctl = devm_kzalloc(&pdev->dev, sizeof(*pctl), GFP_KERNEL);
>  	if (!pctl)
> @@ -954,13 +953,13 @@ int sunxi_pinctrl_init(struct platform_device *pdev,
>  			goto gpiochip_error;
>  	}
>  
> -	clk = devm_clk_get(&pdev->dev, NULL);
> -	if (IS_ERR(clk)) {
> -		ret = PTR_ERR(clk);
> +	pctl->clk = devm_clk_get(&pdev->dev, NULL);
> +	if (IS_ERR(pctl->clk)) {
> +		ret = PTR_ERR(pctl->clk);
>  		goto gpiochip_error;
>  	}
>  
> -	ret = clk_prepare_enable(clk);
> +	ret = clk_prepare_enable(pctl->clk);
>  	if (ret)
>  		goto gpiochip_error;
>  
> @@ -1015,10 +1014,24 @@ int sunxi_pinctrl_init(struct platform_device *pdev,
>  	return 0;
>  
>  clk_error:
> -	clk_disable_unprepare(clk);
> +	clk_disable_unprepare(pctl->clk);
>  gpiochip_error:
>  	gpiochip_remove(pctl->chip);
>  pinctrl_error:
>  	pinctrl_unregister(pctl->pctl_dev);
>  	return ret;
>  }
> +EXPORT_SYMBOL(sunxi_pinctrl_init);
> +
> +int sunxi_pinctrl_remove(struct platform_device *pdev)
> +{
> +	struct sunxi_pinctrl *pctl = platform_get_drvdata(pdev);
> +
> +	gpiochip_remove(pctl->chip);
> +	pinctrl_unregister(pctl->pctl_dev);
> +
> +	clk_disable_unprepare(pctl->clk);

We should also remove the domain and the interrupt mapping here.

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

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