linux-kernel - Re: [PATCH v3 4/9] device property: add fwnode_property_read_string

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Message-ID: <Yj3S0g9kaykY6S+A@smile.fi.intel.com>
Date:   Fri, 25 Mar 2022 16:33:54 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Clément Léger <clement.leger@...tlin.com>
Cc:     Daniel Scally <djrscally@...il.com>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        Wolfram Sang <wsa@...nel.org>, Peter Rosin <peda@...ntia.se>,
        Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        Len Brown <lenb@...nel.org>,
        Hans de Goede <hdegoede@...hat.com>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Allan Nielsen <allan.nielsen@...rochip.com>,
        linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org,
        linux-i2c@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v3 4/9] device property: add
 fwnode_property_read_string_index()

On Fri, Mar 25, 2022 at 12:31:43PM +0100, Clément Léger wrote:
> Add fwnode_property_read_string_index() function which allows to
> retrieve a single string from an array by its index. This function is
> the equivalent of of_property_read_string_index() but for fwnode
> support.

...

> +	ret = fwnode_call_int_op(fwnode, property_read_string_array, propname,
> +				 string, 1, index);
> +	if (ret == -EINVAL && !IS_ERR_OR_NULL(fwnode) &&
> +	    !IS_ERR_OR_NULL(fwnode->secondary))
> +		ret = fwnode_call_int_op(fwnode->secondary,
> +					 property_read_string_array, propname,
> +					 string, 1, index);

This is not fully correct. See [1] for the details.
I hope to send the new version just after the merge window ends.

[1]: https://lore.kernel.org/lkml/20220308123712.18613-1-andriy.shevchenko@linux.intel.com/

-- 
With Best Regards,
Andy Shevchenko