Date:   Wed, 15 Nov 2017 07:48:44 -0800
From:   Moritz Fischer <mdf@...nel.org>
To:     Alan Tull <atull@...nel.org>
Cc:     Moritz Fischer <mdf@...nel.org>, linux-kernel@...r.kernel.org,
        linux-fpga@...r.kernel.org
Subject: Re: [PATCH v5 12/18] fpga: region: rename some functions prior to
 moving

On Tue, Oct 17, 2017 at 04:20:25PM -0500, Alan Tull wrote:
> Rename some functions that will be moved to
> of-fpga-region.c.  Also change some parameters
> and export a function to help with refactoring.
> 
> This is a step towards the larger goal of separating
> device tree support from FPGA region common code.
> 
> * fpga_region_get_manager -> of_fpga_region_get_mgr
> 
> * add 'of_' prefix to the following:
>   * fpga_region_find
>   * fpga_region_get_bridges
>   * fpga_region_notify_pre_apply
>   * fpga_region_notify_post_remove),
>   * fpga_region_probe/remove
> 
> Parameter changes:
> * of_fpga_region_find
>   change parameter to be the device node of the region.
> * of_fpga_region_get_bridges
>   change second parameter to FPGA image info.
> 
> Export of_fpga_region_find as well.
> 
> Signed-off-by: Alan Tull <atull@...nel.org>
Acked-by: Moritz Fischer <mdf@...nel.org>
> ---
> v2: split out from another patch
> v3: no changes in patch for this version of patchset
> v4: no change to this patch in this version of patchset
> v5: no change to this patch in this version of patchset
> ---
>  drivers/fpga/fpga-region.c | 60 ++++++++++++++++++++++++----------------------
>  1 file changed, 31 insertions(+), 29 deletions(-)
> 
> diff --git a/drivers/fpga/fpga-region.c b/drivers/fpga/fpga-region.c
> index 402d0b6..92ab216 100644
> --- a/drivers/fpga/fpga-region.c
> +++ b/drivers/fpga/fpga-region.c
> @@ -42,12 +42,14 @@ static int fpga_region_of_node_match(struct device *dev, const void *data)
>  }
>  
>  /**
> - * fpga_region_find - find FPGA region
> + * of_fpga_region_find - find FPGA region
>   * @np: device node of FPGA Region
> + *
>   * Caller will need to put_device(&region->dev) when done.
> + *
>   * Returns FPGA Region struct or NULL
>   */
> -static struct fpga_region *fpga_region_find(struct device_node *np)
> +static struct fpga_region *of_fpga_region_find(struct device_node *np)
>  {
>  	struct device *dev;
>  
> @@ -107,7 +109,7 @@ static void fpga_region_put(struct fpga_region *region)
>  }
>  
>  /**
> - * fpga_region_get_manager - get reference for FPGA manager
> + * of_fpga_region_get_mgr - get reference for FPGA manager
>   * @np: device node of FPGA region
>   *
>   * Get FPGA Manager from "fpga-mgr" property or from ancestor region.
> @@ -116,7 +118,7 @@ static void fpga_region_put(struct fpga_region *region)
>   *
>   * Return: fpga manager struct or IS_ERR() condition containing error code.
>   */
> -static struct fpga_manager *fpga_region_get_manager(struct device_node *np)
> +static struct fpga_manager *of_fpga_region_get_mgr(struct device_node *np)
>  {
>  	struct device_node  *mgr_node;
>  	struct fpga_manager *mgr;
> @@ -139,9 +141,9 @@ static struct fpga_manager *fpga_region_get_manager(struct device_node *np)
>  }
>  
>  /**
> - * fpga_region_get_bridges - create a list of bridges
> + * of_fpga_region_get_bridges - create a list of bridges
>   * @region: FPGA region
> - * @overlay: device node of the overlay
> + * @info: FPGA image info
>   *
>   * Create a list of bridges including the parent bridge and the bridges
>   * specified by "fpga-bridges" property.  Note that the
> @@ -154,8 +156,8 @@ static struct fpga_manager *fpga_region_get_manager(struct device_node *np)
>   * Return 0 for success (even if there are no bridges specified)
>   * or -EBUSY if any of the bridges are in use.
>   */
> -static int fpga_region_get_bridges(struct fpga_region *region,
> -				   struct device_node *overlay)
> +static int of_fpga_region_get_bridges(struct fpga_region *region,
> +				      struct fpga_image_info *info)
>  {
>  	struct device *dev = &region->dev;
>  	struct device_node *region_np = dev->of_node;
> @@ -163,7 +165,7 @@ static int fpga_region_get_bridges(struct fpga_region *region,
>  	int i, ret;
>  
>  	/* If parent is a bridge, add to list */
> -	ret = of_fpga_bridge_get_to_list(region_np->parent, region->info,
> +	ret = of_fpga_bridge_get_to_list(region_np->parent, info,
>  					 &region->bridge_list);
>  
>  	/* -EBUSY means parent is a bridge that is under use. Give up. */
> @@ -175,8 +177,8 @@ static int fpga_region_get_bridges(struct fpga_region *region,
>  		parent_br = region_np->parent;
>  
>  	/* If overlay has a list of bridges, use it. */
> -	if (of_parse_phandle(overlay, "fpga-bridges", 0))
> -		np = overlay;
> +	if (of_parse_phandle(info->overlay, "fpga-bridges", 0))
> +		np = info->overlay;
>  	else
>  		np = region_np;
>  
> @@ -227,7 +229,7 @@ int fpga_region_program_fpga(struct fpga_region *region)
>  		goto err_put_region;
>  	}
>  
> -	ret = fpga_region_get_bridges(region, info->overlay);
> +	ret = of_fpga_region_get_bridges(region, info);
>  	if (ret) {
>  		dev_err(dev, "failed to get FPGA bridges\n");
>  		goto err_unlock_mgr;
> @@ -397,7 +399,7 @@ static struct fpga_image_info *of_fpga_region_parse_ov(
>  }
>  
>  /**
> - * fpga_region_notify_pre_apply - pre-apply overlay notification
> + * of_fpga_region_notify_pre_apply - pre-apply overlay notification
>   *
>   * @region: FPGA region that the overlay was applied to
>   * @nd: overlay notification data
> @@ -410,8 +412,8 @@ static struct fpga_image_info *of_fpga_region_parse_ov(
>   *
>   * Returns 0 for success or negative error code for failure.
>   */
> -static int fpga_region_notify_pre_apply(struct fpga_region *region,
> -					struct of_overlay_notify_data *nd)
> +static int of_fpga_region_notify_pre_apply(struct fpga_region *region,
> +					   struct of_overlay_notify_data *nd)
>  {
>  	struct device *dev = &region->dev;
>  	struct fpga_image_info *info;
> @@ -441,7 +443,7 @@ static int fpga_region_notify_pre_apply(struct fpga_region *region,
>  }
>  
>  /**
> - * fpga_region_notify_post_remove - post-remove overlay notification
> + * of_fpga_region_notify_post_remove - post-remove overlay notification
>   *
>   * @region: FPGA region that was targeted by the overlay that was removed
>   * @nd: overlay notification data
> @@ -449,8 +451,8 @@ static int fpga_region_notify_pre_apply(struct fpga_region *region,
>   * Called after an overlay has been removed if the overlay's target was a
>   * FPGA region.
>   */
> -static void fpga_region_notify_post_remove(struct fpga_region *region,
> -					   struct of_overlay_notify_data *nd)
> +static void of_fpga_region_notify_post_remove(struct fpga_region *region,
> +					      struct of_overlay_notify_data *nd)
>  {
>  	fpga_bridges_disable(&region->bridge_list);
>  	fpga_bridges_put(&region->bridge_list);
> @@ -493,18 +495,18 @@ static int of_fpga_region_notify(struct notifier_block *nb,
>  		return NOTIFY_OK;
>  	}
>  
> -	region = fpga_region_find(nd->target);
> +	region = of_fpga_region_find(nd->target);
>  	if (!region)
>  		return NOTIFY_OK;
>  
>  	ret = 0;
>  	switch (action) {
>  	case OF_OVERLAY_PRE_APPLY:
> -		ret = fpga_region_notify_pre_apply(region, nd);
> +		ret = of_fpga_region_notify_pre_apply(region, nd);
>  		break;
>  
>  	case OF_OVERLAY_POST_REMOVE:
> -		fpga_region_notify_post_remove(region, nd);
> +		of_fpga_region_notify_post_remove(region, nd);
>  		break;
>  	}
>  
> @@ -520,7 +522,7 @@ static struct notifier_block fpga_region_of_nb = {
>  	.notifier_call = of_fpga_region_notify,
>  };
>  
> -static int fpga_region_probe(struct platform_device *pdev)
> +static int of_fpga_region_probe(struct platform_device *pdev)
>  {
>  	struct device *dev = &pdev->dev;
>  	struct device_node *np = dev->of_node;
> @@ -528,7 +530,7 @@ static int fpga_region_probe(struct platform_device *pdev)
>  	struct fpga_manager *mgr;
>  	int id, ret = 0;
>  
> -	mgr = fpga_region_get_manager(np);
> +	mgr = of_fpga_region_get_mgr(np);
>  	if (IS_ERR(mgr))
>  		return -EPROBE_DEFER;
>  
> @@ -580,7 +582,7 @@ static int fpga_region_probe(struct platform_device *pdev)
>  	return ret;
>  }
>  
> -static int fpga_region_remove(struct platform_device *pdev)
> +static int of_fpga_region_remove(struct platform_device *pdev)
>  {
>  	struct fpga_region *region = platform_get_drvdata(pdev);
>  
> @@ -590,9 +592,9 @@ static int fpga_region_remove(struct platform_device *pdev)
>  	return 0;
>  }
>  
> -static struct platform_driver fpga_region_driver = {
> -	.probe = fpga_region_probe,
> -	.remove = fpga_region_remove,
> +static struct platform_driver of_fpga_region_driver = {
> +	.probe = of_fpga_region_probe,
> +	.remove = of_fpga_region_remove,
>  	.driver = {
>  		.name	= "fpga-region",
>  		.of_match_table = of_match_ptr(fpga_region_of_match),
> @@ -625,7 +627,7 @@ static int __init fpga_region_init(void)
>  	if (ret)
>  		goto err_class;
>  
> -	ret = platform_driver_register(&fpga_region_driver);
> +	ret = platform_driver_register(&of_fpga_region_driver);
>  	if (ret)
>  		goto err_plat;
>  
> @@ -641,7 +643,7 @@ static int __init fpga_region_init(void)
>  
>  static void __exit fpga_region_exit(void)
>  {
> -	platform_driver_unregister(&fpga_region_driver);
> +	platform_driver_unregister(&of_fpga_region_driver);
>  	of_overlay_notifier_unregister(&fpga_region_of_nb);
>  	class_destroy(fpga_region_class);
>  	ida_destroy(&fpga_region_ida);
> -- 
> 2.7.4
> 

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