Date:	Fri, 26 Feb 2016 16:35:26 +0200
From:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:	Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>
Cc:	Lee Jones <lee.jones@...aro.org>,
	Mika Westerberg <mika.westerberg@...ux.intel.com>,
	Thierry Reding <treding@...dia.com>,
	linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org
Subject: Re: [PATCH] device property: don't bother the drivers with struct
 property_set

On Fri, 2016-02-26 at 13:20 +0200, Heikki Krogerus wrote:
> Since device_add_property_set() now always takes a copy of
> the property_set, and also since the fwnode type is always
> hard coded to be FWNODE_PDATA, there is no need for the
> drivers to deliver the entire struct property_set. The
> function can just create the instance of it on its own and
> bind the properties from the drivers to it on the spot.
> 
> This renames device_add_property_set() to
> device_add_properties(). The function now takes struct
> property_entry as its parameter instead of struct
> property_set.

Rationale IIUC is the eliminating of an extra structure definition in
users.

FWIW:
Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>


> 
> Signed-off-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
> ---
>  arch/arm/mach-tegra/board-paz00.c |  6 +-----
>  drivers/base/platform.c           | 19 ++++++++++---------
>  drivers/base/property.c           | 35 ++++++++++++++++++++++-------
> ------
>  drivers/mfd/intel-lpss-acpi.c     |  6 +-----
>  drivers/mfd/intel-lpss-pci.c      | 14 +++-----------
>  drivers/mfd/intel-lpss.c          |  2 +-
>  drivers/mfd/intel-lpss.h          |  2 +-
>  drivers/mfd/mfd-core.c            |  4 ++--
>  include/linux/mfd/core.h          |  2 +-
>  include/linux/platform_device.h   |  4 ++--
>  include/linux/property.h          | 15 +++------------
>  11 files changed, 47 insertions(+), 62 deletions(-)
> 
> Hi Rafael,
> 
> This depends on Johannes' wireless next tree:
> git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next.git
> 
> 
> diff --git a/arch/arm/mach-tegra/board-paz00.c b/arch/arm/mach-
> tegra/board-paz00.c
> index 52db8bf..7478f6f 100644
> --- a/arch/arm/mach-tegra/board-paz00.c
> +++ b/arch/arm/mach-tegra/board-paz00.c
> @@ -29,10 +29,6 @@ static struct property_entry __initdata
> wifi_rfkill_prop[] = {
>  	{ },
>  };
>  
> -static struct property_set __initdata wifi_rfkill_pset = {
> -	.properties = wifi_rfkill_prop,
> -};
> -
>  static struct platform_device wifi_rfkill_device = {
>  	.name	= "rfkill_gpio",
>  	.id	= -1,
> @@ -49,7 +45,7 @@ static struct gpiod_lookup_table wifi_gpio_lookup =
> {
>  
>  void __init tegra_paz00_wifikill_init(void)
>  {
> -	platform_device_add_properties(&wifi_rfkill_device,
> &wifi_rfkill_pset);
> +	platform_device_add_properties(&wifi_rfkill_device,
> wifi_rfkill_prop);
>  	gpiod_add_lookup_table(&wifi_gpio_lookup);
>  	platform_device_register(&wifi_rfkill_device);
>  }
> diff --git a/drivers/base/platform.c b/drivers/base/platform.c
> index f437afa..6482d47 100644
> --- a/drivers/base/platform.c
> +++ b/drivers/base/platform.c
> @@ -322,16 +322,16 @@ EXPORT_SYMBOL_GPL(platform_device_add_data);
>  /**
>   * platform_device_add_properties - add built-in properties to a
> platform device
>   * @pdev: platform device to add properties to
> - * @pset: properties to add
> + * @properties: null terminated array of properties to add
>   *
> - * The function will take deep copy of the properties in @pset and
> attach
> - * the copy to the platform device. The memory associated with
> properties
> - * will be freed when the platform device is released.
> + * The function will take deep copy of @properties and attach the
> copy to the
> + * platform device. The memory associated with properties will be
> freed when the
> + * platform device is released.
>   */
>  int platform_device_add_properties(struct platform_device *pdev,
> -				   const struct property_set *pset)
> +				   struct property_entry
> *properties)
>  {
> -	return device_add_property_set(&pdev->dev, pset);
> +	return device_add_properties(&pdev->dev, properties);
>  }
>  EXPORT_SYMBOL_GPL(platform_device_add_properties);
>  
> @@ -447,7 +447,7 @@ void platform_device_del(struct platform_device
> *pdev)
>  				release_resource(r);
>  		}
>  
> -		device_remove_property_set(&pdev->dev);
> +		device_remove_properties(&pdev->dev);
>  	}
>  }
>  EXPORT_SYMBOL_GPL(platform_device_del);
> @@ -526,8 +526,9 @@ struct platform_device
> *platform_device_register_full(
>  	if (ret)
>  		goto err;
>  
> -	if (pdevinfo->pset) {
> -		ret = platform_device_add_properties(pdev, pdevinfo-
> >pset);
> +	if (pdevinfo->properties) {
> +		ret = platform_device_add_properties(pdev,
> +						     pdevinfo-
> >properties);
>  		if (ret)
>  			goto err;
>  	}
> diff --git a/drivers/base/property.c b/drivers/base/property.c
> index 167f0a9..8442033 100644
> --- a/drivers/base/property.c
> +++ b/drivers/base/property.c
> @@ -19,6 +19,11 @@
>  #include <linux/etherdevice.h>
>  #include <linux/phy.h>
>  
> +struct property_set {
> +	struct fwnode_handle fwnode;
> +	struct property_entry *properties;
> +};
> +
>  static inline bool is_pset_node(struct fwnode_handle *fwnode)
>  {
>  	return fwnode && fwnode->type == FWNODE_PDATA;
> @@ -797,14 +802,14 @@ static struct property_set *pset_copy_set(const
> struct property_set *pset)
>  }
>  
>  /**
> - * device_remove_property_set - Remove properties from a device
> object.
> + * device_remove_properties - Remove properties from a device
> object.
>   * @dev: Device whose properties to remove.
>   *
>   * The function removes properties previously associated to the
> device
> - * secondary firmware node with device_add_property_set(). Memory
> allocated
> + * secondary firmware node with device_add_properties(). Memory
> allocated
>   * to the properties will also be released.
>   */
> -void device_remove_property_set(struct device *dev)
> +void device_remove_properties(struct device *dev)
>  {
>  	struct fwnode_handle *fwnode;
>  
> @@ -822,24 +827,28 @@ void device_remove_property_set(struct device
> *dev)
>  		pset_free_set(to_pset_node(fwnode));
>  	set_secondary_fwnode(dev, NULL);
>  }
> -EXPORT_SYMBOL_GPL(device_remove_property_set);
> +EXPORT_SYMBOL_GPL(device_remove_properties);
>  
>  /**
> - * device_add_property_set - Add a collection of properties to a
> device object.
> + * device_add_properties - Add a collection of properties to a
> device object.
>   * @dev: Device to add properties to.
> - * @pset: Collection of properties to add.
> + * @properties: Collection of properties to add.
>   *
> - * Associate a collection of device properties represented by @pset
> with @dev
> - * as its secondary firmware node. The function takes a copy of
> @pset.
> + * Associate a collection of device properties represented by
> @properties with
> + * @dev as its secondary firmware node. The function takes a copy of
> + * @properties.
>   */
> -int device_add_property_set(struct device *dev, const struct
> property_set *pset)
> +int device_add_properties(struct device *dev,
> +			  struct property_entry *properties)
>  {
> -	struct property_set *p;
> +	struct property_set *p, pset;
>  
> -	if (!pset)
> +	if (!properties)
>  		return -EINVAL;
>  
> -	p = pset_copy_set(pset);
> +	pset.properties = properties;
> +
> +	p = pset_copy_set(&pset);
>  	if (IS_ERR(p))
>  		return PTR_ERR(p);
>  
> @@ -847,7 +856,7 @@ int device_add_property_set(struct device *dev,
> const struct property_set *pset)
>  	set_secondary_fwnode(dev, &p->fwnode);
>  	return 0;
>  }
> -EXPORT_SYMBOL_GPL(device_add_property_set);
> +EXPORT_SYMBOL_GPL(device_add_properties);
>  
>  /**
>   * device_get_next_child_node - Return the next child node handle
> for a device
> diff --git a/drivers/mfd/intel-lpss-acpi.c b/drivers/mfd/intel-lpss-
> acpi.c
> index 06f00d6..8e94ad2 100644
> --- a/drivers/mfd/intel-lpss-acpi.c
> +++ b/drivers/mfd/intel-lpss-acpi.c
> @@ -31,13 +31,9 @@ static struct property_entry spt_i2c_properties[]
> = {
>  	{ },
>  };
>  
> -static struct property_set spt_i2c_pset = {
> -	.properties = spt_i2c_properties,
> -};
> -
>  static const struct intel_lpss_platform_info spt_i2c_info = {
>  	.clk_rate = 120000000,
> -	.pset = &spt_i2c_pset,
> +	.properties = spt_i2c_properties,
>  };
>  
>  static const struct intel_lpss_platform_info bxt_info = {
> diff --git a/drivers/mfd/intel-lpss-pci.c b/drivers/mfd/intel-lpss-
> pci.c
> index afc7af9..5855cce 100644
> --- a/drivers/mfd/intel-lpss-pci.c
> +++ b/drivers/mfd/intel-lpss-pci.c
> @@ -71,13 +71,9 @@ static struct property_entry spt_i2c_properties[]
> = {
>  	{ },
>  };
>  
> -static struct property_set spt_i2c_pset = {
> -	.properties = spt_i2c_properties,
> -};
> -
>  static const struct intel_lpss_platform_info spt_i2c_info = {
>  	.clk_rate = 120000000,
> -	.pset = &spt_i2c_pset,
> +	.properties = spt_i2c_properties,
>  };
>  
>  static struct property_entry uart_properties[] = {
> @@ -87,14 +83,10 @@ static struct property_entry uart_properties[] =
> {
>  	{ },
>  };
>  
> -static struct property_set uart_pset = {
> -	.properties = uart_properties,
> -};
> -
>  static const struct intel_lpss_platform_info spt_uart_info = {
>  	.clk_rate = 120000000,
>  	.clk_con_id = "baudclk",
> -	.pset = &uart_pset,
> +	.properties = uart_properties,
>  };
>  
>  static const struct intel_lpss_platform_info bxt_info = {
> @@ -104,7 +96,7 @@ static const struct intel_lpss_platform_info
> bxt_info = {
>  static const struct intel_lpss_platform_info bxt_uart_info = {
>  	.clk_rate = 100000000,
>  	.clk_con_id = "baudclk",
> -	.pset = &uart_pset,
> +	.properties = uart_properties,
>  };
>  
>  static const struct intel_lpss_platform_info bxt_i2c_info = {
> diff --git a/drivers/mfd/intel-lpss.c b/drivers/mfd/intel-lpss.c
> index 1bbbe87..6352aab 100644
> --- a/drivers/mfd/intel-lpss.c
> +++ b/drivers/mfd/intel-lpss.c
> @@ -407,7 +407,7 @@ int intel_lpss_probe(struct device *dev,
>  	if (ret)
>  		return ret;
>  
> -	lpss->cell->pset = info->pset;
> +	lpss->cell->properties = info->properties;
>  
>  	intel_lpss_init_dev(lpss);
>  
> diff --git a/drivers/mfd/intel-lpss.h b/drivers/mfd/intel-lpss.h
> index 0dcea9e..d064973 100644
> --- a/drivers/mfd/intel-lpss.h
> +++ b/drivers/mfd/intel-lpss.h
> @@ -23,7 +23,7 @@ struct intel_lpss_platform_info {
>  	int irq;
>  	unsigned long clk_rate;
>  	const char *clk_con_id;
> -	struct property_set *pset;
> +	struct property_entry *properties;
>  };
>  
>  int intel_lpss_probe(struct device *dev,
> diff --git a/drivers/mfd/mfd-core.c b/drivers/mfd/mfd-core.c
> index 88bd1b1..fc1c1fc 100644
> --- a/drivers/mfd/mfd-core.c
> +++ b/drivers/mfd/mfd-core.c
> @@ -193,8 +193,8 @@ static int mfd_add_device(struct device *parent,
> int id,
>  			goto fail_alias;
>  	}
>  
> -	if (cell->pset) {
> -		ret = platform_device_add_properties(pdev, cell-
> >pset);
> +	if (cell->properties) {
> +		ret = platform_device_add_properties(pdev, cell-
> >properties);
>  		if (ret)
>  			goto fail_alias;
>  	}
> diff --git a/include/linux/mfd/core.h b/include/linux/mfd/core.h
> index 1a5a87f..ba9d79f 100644
> --- a/include/linux/mfd/core.h
> +++ b/include/linux/mfd/core.h
> @@ -73,7 +73,7 @@ struct mfd_cell {
>  	size_t			pdata_size;
>  
>  	/* device properties passed to the sub devices drivers */
> -	const struct property_set *pset;
> +	struct property_entry *properties;
>  
>  	/*
>  	 * Device Tree compatible string
> diff --git a/include/linux/platform_device.h
> b/include/linux/platform_device.h
> index 03b7555..66dca60 100644
> --- a/include/linux/platform_device.h
> +++ b/include/linux/platform_device.h
> @@ -73,7 +73,7 @@ struct platform_device_info {
>  		size_t size_data;
>  		u64 dma_mask;
>  
> -		const struct property_set *pset;
> +		struct property_entry *properties;
>  };
>  extern struct platform_device *platform_device_register_full(
>  		const struct platform_device_info *pdevinfo);
> @@ -172,7 +172,7 @@ extern int platform_device_add_resources(struct
> platform_device *pdev,
>  extern int platform_device_add_data(struct platform_device *pdev,
>  				    const void *data, size_t size);
>  extern int platform_device_add_properties(struct platform_device
> *pdev,
> -					  const struct property_set
> *pset);
> +					  struct property_entry
> *properties);
>  extern int platform_device_add(struct platform_device *pdev);
>  extern void platform_device_del(struct platform_device *pdev);
>  extern void platform_device_put(struct platform_device *pdev);
> diff --git a/include/linux/property.h b/include/linux/property.h
> index b51fcd3..ecab11e 100644
> --- a/include/linux/property.h
> +++ b/include/linux/property.h
> @@ -238,18 +238,9 @@ struct property_entry {
>  	.name = _name_,				\
>  }
>  
> -/**
> - * struct property_set - Collection of "built-in" device properties.
> - * @fwnode: Handle to be pointed to by the fwnode field of struct
> device.
> - * @properties: Array of properties terminated with a null entry.
> - */
> -struct property_set {
> -	struct fwnode_handle fwnode;
> -	struct property_entry *properties;
> -};
> -
> -int device_add_property_set(struct device *dev, const struct
> property_set *pset);
> -void device_remove_property_set(struct device *dev);
> +int device_add_properties(struct device *dev,
> +			  struct property_entry *properties);
> +void device_remove_properties(struct device *dev);
>  
>  bool device_dma_supported(struct device *dev);
>  

-- 
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Intel Finland Oy

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