linux-kernel - Problems with commit 9ec36cafe4 (of/irq: do irq resolution in platform_get

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Message-ID: <20140617181034.GA25854@roeck-us.net>
Date:	Tue, 17 Jun 2014 11:10:34 -0700
From:	Guenter Roeck <linux@...ck-us.net>
To:	Rob Herring <robh@...nel.org>, linux-kernel@...r.kernel.org
Cc:	Samuel Ortiz <sameo@...ux.intel.com>,
	Lee Jones <lee.jones@...aro.org>
Subject: Problems with commit 9ec36cafe4 (of/irq: do irq resolution in
 platform_get_irq) and mfd client devices

Hi,

I have an mfd master and client drivers on a system which has devicetree
enabled. The mfd master driver passes interrupts to the clients using 
mfd cells and 'struct resource'. The client driver is a platform driver
which retrieves the irq using platform_get_irq().

After commit 9ec36cafe (of/irq: do irq resolution in platform_get_irq),
this code no longer works. This is because platform_get_irq() does no
longer call platform_get_resource() if OF is enabled and if dev->of_node
is not NULL (it is not NULL because there is other [static] information
which is passed to the client with devicetree data). 

Any idea how to solve this problem ? How do I now pass a virtual interrupt
from an mfd master to its clients if devicetree is enabled ?

Thanks,
Guenter
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