linux-kernel - Re: [PATCH v5 09/12] Driver core: Unified interface for firmware node properties

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Date:	Mon, 20 Oct 2014 01:31:07 +0200
From:	"Rafael J. Wysocki" <rjw@...ysocki.net>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Grant Likely <grant.likely@...aro.org>,
	Arnd Bergmann <arnd@...db.de>,
	Mika Westerberg <mika.westerberg@...ux.intel.com>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	Aaron Lu <aaron.lu@...el.com>, devicetree@...r.kernel.org,
	Linus Walleij <linus.walleij@...aro.org>,
	Alexandre Courbot <gnurou@...il.com>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Bryan Wu <cooloney@...il.com>,
	Darren Hart <dvhart@...ux.intel.com>,
	Mark Rutland <mark.rutland@....com>
Subject: Re: [PATCH v5 09/12] Driver core: Unified interface for firmware node properties

On Monday, October 20, 2014 06:14:34 AM Greg Kroah-Hartman wrote:
> On Fri, Oct 17, 2014 at 02:14:53PM +0200, Rafael J. Wysocki wrote:
> > From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> > 
> > Add new generic routines are provided for retrieving properties from
> > device description objects in the platform firmware in case there are
> > no struct device objects for them (either those objects have not been
> > created yet or they do not exist at all).
> > 
> > The following functions are provided:
> > 
> > fwnode_property_present()
> > fwnode_property_read_u8()
> > fwnode_property_read_u16()
> > fwnode_property_read_u32()
> > fwnode_property_read_u64()
> > fwnode_property_read_string()
> > fwnode_property_read_u8_array()
> > fwnode_property_read_u16_array()
> > fwnode_property_read_u32_array()
> > fwnode_property_read_u64_array()
> > fwnode_property_read_string_array()
> > 
> > in analogy with the corresponding functions for struct device added
> > previously.  For all of them, the first argument is a pointer to struct
> > fwnode_handle (new type) that allows a device description object
> > (depending on what platform firmware interface is in use) to be
> > obtained.
> > 
> > Add a new macro device_for_each_child_node() for iterating over the
> > children of the device description object associated with a given
> > device and a new function device_get_child_node_count() returning the
> > number of a given device's child nodes.
> > 
> > The interface covers both ACPI and Device Trees.
> > 
> > Suggested-by: Grant Likely <grant.likely@...aro.org>
> > Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> 
> Acked-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

Thanks!

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