linux-kernel - Re: [PATCH] base: soc: set machine name in soc_device

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Message-ID: <ZBP14wghbJPCnAFJ@kroah.com>
Date:   Fri, 17 Mar 2023 06:08:51 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Heiner Kallweit <hkallweit1@...il.com>
Cc:     "Rafael J. Wysocki" <rafael@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] base: soc: set machine name in soc_device_register if
 empty

On Thu, Mar 16, 2023 at 09:35:59PM +0100, Heiner Kallweit wrote:
> Several SoC drivers use the same of-based mechanism to populate the machine
> name. Therefore move this to the core and try to populate the machine name
> in soc_device_register if it's not set yet.
> 
> Signed-off-by: Heiner Kallweit <hkallweit1@...il.com>
> ---
>  drivers/base/soc.c | 15 +++++++++++++++
>  1 file changed, 15 insertions(+)
> 
> diff --git a/drivers/base/soc.c b/drivers/base/soc.c
> index 0fb1d4ab9..8dec5228f 100644
> --- a/drivers/base/soc.c
> +++ b/drivers/base/soc.c
> @@ -7,6 +7,7 @@
>  
>  #include <linux/sysfs.h>
>  #include <linux/init.h>
> +#include <linux/of.h>
>  #include <linux/stat.h>
>  #include <linux/slab.h>
>  #include <linux/idr.h>
> @@ -110,6 +111,18 @@ static void soc_release(struct device *dev)
>  	kfree(soc_dev);
>  }
>  
> +static void soc_device_set_machine(struct soc_device_attribute *soc_dev_attr)
> +{
> +	struct device_node *np;
> +
> +	if (soc_dev_attr->machine)
> +		return;
> +
> +	np = of_find_node_by_path("/");
> +	of_property_read_string(np, "model", &soc_dev_attr->machine);
> +	of_node_put(np);
> +}
> +
>  static struct soc_device_attribute *early_soc_dev_attr;
>  
>  struct soc_device *soc_device_register(struct soc_device_attribute *soc_dev_attr)
> @@ -118,6 +131,8 @@ struct soc_device *soc_device_register(struct soc_device_attribute *soc_dev_attr
>  	const struct attribute_group **soc_attr_groups;
>  	int ret;
>  
> +	soc_device_set_machine(soc_dev_attr);
> +

Does this mean some SoC drivers should also be changed at the same time
if they are trying to do this?

And is "model" the correct of property for this?  I thought that devices
also had "model" as a valid entry, is this documented somewhere in the
DTS schema that I couldn't find?

thanks,

greg k-h