Re: [PATCH v2 1/6] pinctrl: berlin: regmap as an extra argument of berlin_pinctrl_probe()

[Antoine Tenart <antoine.tenart@free-electrons.com>]

Hi Jisheng,

Thanks for providing this!

On Mon, Sep 21, 2015 at 06:04:15PM +0800, Jisheng Zhang wrote:
> Let berlin_pinctrl_probe() accepts an extra argument: regmap, this is to
> prepare for the next berlin4ct support, where we won't use simple-mfd
> any more.

Just a question here: why don't we have instead one
berlin_pinctrl_probe() and one berlin_pinctrl_probe_regmap(), both
calling a static probe function in berlin.c, to avoid duplicating code?

Antoine

> Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
> ---
>  drivers/pinctrl/berlin/berlin-bg2.c   | 10 +++++++++-
>  drivers/pinctrl/berlin/berlin-bg2cd.c | 10 +++++++++-
>  drivers/pinctrl/berlin/berlin-bg2q.c  | 10 +++++++++-
>  drivers/pinctrl/berlin/berlin.c       |  9 +--------
>  drivers/pinctrl/berlin/berlin.h       |  1 +
>  5 files changed, 29 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/pinctrl/berlin/berlin-bg2.c b/drivers/pinctrl/berlin/berlin-bg2.c
> index 274c553..4aede2e 100644
> --- a/drivers/pinctrl/berlin/berlin-bg2.c
> +++ b/drivers/pinctrl/berlin/berlin-bg2.c
> @@ -10,6 +10,7 @@
>   * warranty of any kind, whether express or implied.
>   */
>  
> +#include <linux/mfd/syscon.h>
>  #include <linux/module.h>
>  #include <linux/of_device.h>
>  #include <linux/platform_device.h>
> @@ -233,8 +234,15 @@ static int berlin2_pinctrl_probe(struct platform_device *pdev)
>  {
>  	const struct of_device_id *match =
>  		of_match_device(berlin2_pinctrl_match, &pdev->dev);
> +	struct device *dev = &pdev->dev;
> +	struct device_node *parent_np = of_get_parent(dev->of_node);
> +	struct regmap *regmap = syscon_node_to_regmap(parent_np);
>  
> -	return berlin_pinctrl_probe(pdev, match->data);
> +	of_node_put(parent_np);
> +	if (IS_ERR(regmap))
> +		return PTR_ERR(regmap);
> +
> +	return berlin_pinctrl_probe(pdev, regmap, match->data);
>  }
>  
>  static struct platform_driver berlin2_pinctrl_driver = {
> diff --git a/drivers/pinctrl/berlin/berlin-bg2cd.c b/drivers/pinctrl/berlin/berlin-bg2cd.c
> index 0cb793a..6378dd8 100644
> --- a/drivers/pinctrl/berlin/berlin-bg2cd.c
> +++ b/drivers/pinctrl/berlin/berlin-bg2cd.c
> @@ -10,6 +10,7 @@
>   * warranty of any kind, whether express or implied.
>   */
>  
> +#include <linux/mfd/syscon.h>
>  #include <linux/module.h>
>  #include <linux/of_device.h>
>  #include <linux/platform_device.h>
> @@ -176,8 +177,15 @@ static int berlin2cd_pinctrl_probe(struct platform_device *pdev)
>  {
>  	const struct of_device_id *match =
>  		of_match_device(berlin2cd_pinctrl_match, &pdev->dev);
> +	struct device *dev = &pdev->dev;
> +	struct device_node *parent_np = of_get_parent(dev->of_node);
> +	struct regmap *regmap = syscon_node_to_regmap(parent_np);
>  
> -	return berlin_pinctrl_probe(pdev, match->data);
> +	of_node_put(parent_np);
> +	if (IS_ERR(regmap))
> +		return PTR_ERR(regmap);
> +
> +	return berlin_pinctrl_probe(pdev, regmap, match->data);
>  }
>  
>  static struct platform_driver berlin2cd_pinctrl_driver = {
> diff --git a/drivers/pinctrl/berlin/berlin-bg2q.c b/drivers/pinctrl/berlin/berlin-bg2q.c
> index a466054..907bdf0 100644
> --- a/drivers/pinctrl/berlin/berlin-bg2q.c
> +++ b/drivers/pinctrl/berlin/berlin-bg2q.c
> @@ -10,6 +10,7 @@
>   * warranty of any kind, whether express or implied.
>   */
>  
> +#include <linux/mfd/syscon.h>
>  #include <linux/module.h>
>  #include <linux/of_device.h>
>  #include <linux/platform_device.h>
> @@ -395,8 +396,15 @@ static int berlin2q_pinctrl_probe(struct platform_device *pdev)
>  {
>  	const struct of_device_id *match =
>  		of_match_device(berlin2q_pinctrl_match, &pdev->dev);
> +	struct device *dev = &pdev->dev;
> +	struct device_node *parent_np = of_get_parent(dev->of_node);
> +	struct regmap *regmap = syscon_node_to_regmap(parent_np);
>  
> -	return berlin_pinctrl_probe(pdev, match->data);
> +	of_node_put(parent_np);
> +	if (IS_ERR(regmap))
> +		return PTR_ERR(regmap);
> +
> +	return berlin_pinctrl_probe(pdev, regmap, match->data);
>  }
>  
>  static struct platform_driver berlin2q_pinctrl_driver = {
> diff --git a/drivers/pinctrl/berlin/berlin.c b/drivers/pinctrl/berlin/berlin.c
> index f495806..0557bbe 100644
> --- a/drivers/pinctrl/berlin/berlin.c
> +++ b/drivers/pinctrl/berlin/berlin.c
> @@ -11,7 +11,6 @@
>   */
>  
>  #include <linux/io.h>
> -#include <linux/mfd/syscon.h>
>  #include <linux/module.h>
>  #include <linux/of.h>
>  #include <linux/of_address.h>
> @@ -293,19 +292,13 @@ static struct pinctrl_desc berlin_pctrl_desc = {
>  };
>  
>  int berlin_pinctrl_probe(struct platform_device *pdev,
> +			 struct regmap *regmap,
>  			 const struct berlin_pinctrl_desc *desc)
>  {
>  	struct device *dev = &pdev->dev;
> -	struct device_node *parent_np = of_get_parent(dev->of_node);
>  	struct berlin_pinctrl *pctrl;
> -	struct regmap *regmap;
>  	int ret;
>  
> -	regmap = syscon_node_to_regmap(parent_np);
> -	of_node_put(parent_np);
> -	if (IS_ERR(regmap))
> -		return PTR_ERR(regmap);
> -
>  	pctrl = devm_kzalloc(dev, sizeof(*pctrl), GFP_KERNEL);
>  	if (!pctrl)
>  		return -ENOMEM;
> diff --git a/drivers/pinctrl/berlin/berlin.h b/drivers/pinctrl/berlin/berlin.h
> index e1aa841..bf5781a 100644
> --- a/drivers/pinctrl/berlin/berlin.h
> +++ b/drivers/pinctrl/berlin/berlin.h
> @@ -56,6 +56,7 @@ struct berlin_pinctrl_function {
>  #define BERLIN_PINCTRL_FUNCTION_UNKNOWN		{}
>  
>  int berlin_pinctrl_probe(struct platform_device *pdev,
> +			 struct regmap *regmap,
>  			 const struct berlin_pinctrl_desc *desc);
>  
>  #endif /* __PINCTRL_BERLIN_H */
> -- 
> 2.5.3
> 

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