linux-kernel - Re: [PATCH v3 2/3] device property: Implement device_is

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Date:   Tue, 13 Jun 2023 22:10:13 +0300
From:   Serge Semin <fancer.lancer@...il.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-acpi@...r.kernel.org, Hans de Goede <hdegoede@...hat.com>,
        Jens Axboe <axboe@...nel.dk>,
        Damien Le Moal <dlemoal@...nel.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Len Brown <lenb@...nel.org>,
        Daniel Scally <djrscally@...il.com>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>
Subject: Re: [PATCH v3 2/3] device property: Implement device_is_compatible()

On Mon, Jun 12, 2023 at 07:10:10PM +0300, Andy Shevchenko wrote:
> Some users want to use the struct device pointer to see if the
> device is compatible in terms of Open Firmware specifications,
> i.e. if it has a 'compatible' property and it matches to the
> given value. Provide inline helper for the users.
> 
> Reviewed-by: Sakari Ailus <sakari.ailus@...ux.intel.com>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>


C/P v2: IMO much useful wrapper. Thanks for the patch.
Reviewed-by: Serge Semin <fancer.lancer@...il.com>

-Serge(y)

> ---
>  include/linux/property.h | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
> 
> diff --git a/include/linux/property.h b/include/linux/property.h
> index 3df7e10156d8..0251138c7c88 100644
> --- a/include/linux/property.h
> +++ b/include/linux/property.h
> @@ -90,6 +90,18 @@ bool fwnode_device_is_compatible(const struct fwnode_handle *fwnode, const char
>  	return fwnode_property_match_string(fwnode, "compatible", compat) >= 0;
>  }
>  
> +/**
> + * device_is_compatible - match 'compatible' property of the device with a given string
> + * @dev: Pointer to the struct device
> + * @compat: The string to match 'compatible' property with
> + *
> + * Returns: true if matches, otherwise false.
> + */
> +static inline bool device_is_compatible(const struct device *dev, const char *compat)
> +{
> +	return fwnode_device_is_compatible(dev_fwnode(dev), compat);
> +}
> +
>  int fwnode_property_get_reference_args(const struct fwnode_handle *fwnode,
>  				       const char *prop, const char *nargs_prop,
>  				       unsigned int nargs, unsigned int index,
> -- 
> 2.40.0.1.gaa8946217a0b
> 
>