From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Subject: Re: [PATCH v3 2/4] ACPI / scan: Create platform device for fwnodes
 with multiple i2c devices
Date: Tue, 07 Aug 2018 14:19:40 +0300
Message-ID: <00e16cb09c171b536449b61124473291f2b30d0b.camel@linux.intel.com>
References: <20180807080539.17811-1-hdegoede@redhat.com>
         <20180807080539.17811-3-hdegoede@redhat.com>
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To: Hans de Goede <hdegoede@redhat.com>, "Rafael J . Wysocki" <rjw@rjwysocki.net>, Len Brown <lenb@kernel.org>, Mika Westerberg <mika.westerberg@linux.intel.com>, Darren Hart <dvhart@infradead.org>, Wolfram Sang <wsa@the-dreams.de>
Cc: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>, linux-acpi@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-kernel@vger.kernel.org, Heikki Krogerus <heikki.krogerus@linux.intel.com>, John Garry <john.garry@huawei.com>, linux-i2c@vger.kernel.org
List-Id: linux-acpi@vger.kernel.org

On Tue, 2018-08-07 at 10:05 +0200, Hans de Goede wrote:
> Some devices have multiple I2cSerialBus resources and for things to
> work
> an i2c-client must be instantiated for each, each with its own
> i2c_device_id.
> 
> Normally we only instantiate an i2c-client for the first resource,
> using
> the ACPI HID as id.
> 
> This commit adds a list of HIDs of devices, which need multiple i2c-
> clients
> instantiated from a single fwnode, to
> acpi_device_enumeration_by_parent and
> makes acpi_device_enumeration_by_parent return false for these devices
> so
> that a platform device will be instantiated.
> 
> This allows the drivers/platform/x86/i2c-multi-instantiate.c driver,
> which
> knows which i2c_device_id to use for each resource, to bind to the
> fwnode
> and initiate an i2c-client for each resource.
> 

> +	/*
> +	 * These devices have multiple I2cSerialBus resources and an
> i2c-client
> +	 * must be instantiated for each, each with its own
> i2c_device_id.
> +	 * Normally we only instantiate an i2c-client for the first
> resource,
> +	 * using the ACPI HID as id. These special cases are handled by
> the
> +	 * drivers/platform/x86/i2c-multi-instantiate.c driver, which
> knows
> +	 * which i2c_device_id to use for each resource.
> +	 */
> +	static const struct acpi_device_id i2c_multi_instantiate_ids[] =
> {
> +		{"BSG1160", 0},
> +		{"", 0},
> +	};

Style nits:
- can we move it outside of function?
- terminator better without comma
- is this existing style in the file and / or files in this folder for
IDs? (I mean unnecessary 0:s and empty string?

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