linux-kernel - Re: [PATCH v9 02/12] PCI: OF: Parse and map the IRQ when adding the PCI device.

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Message-ID: <20140814145804.GA5586@richard>
Date:	Thu, 14 Aug 2014 22:58:04 +0800
From:	Wei Yang <weiyang@...ux.vnet.ibm.com>
To:	Liviu Dudau <Liviu.Dudau@....com>
Cc:	Bjorn Helgaas <bhelgaas@...gle.com>,
	Catalin Marinas <Catalin.Marinas@....com>,
	Will Deacon <Will.Deacon@....com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Arnd Bergmann <arnd@...db.de>,
	Russell King <linux@....linux.org.uk>,
	Tanmay Inamdar <tinamdar@....com>,
	Grant Likely <grant.likely@...retlab.ca>,
	Sinan Kaya <okaya@...eaurora.org>,
	Jingoo Han <jg1.han@...sung.com>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Suravee Suthikulanit <suravee.suthikulpanit@....com>,
	linux-pci <linux-pci@...r.kernel.org>,
	linux-arch <linux-arch@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Device Tree ML <devicetree@...r.kernel.org>,
	LAKML <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v9 02/12] PCI: OF: Parse and map the IRQ when adding the
 PCI device.

On Tue, Aug 12, 2014 at 05:25:15PM +0100, Liviu Dudau wrote:
>Enhance the default implementation of pcibios_add_device() to
>parse and map the IRQ of the device if a DT binding is available.
>
>Cc: Bjorn Helgaas <bhelgaas@...gle.com>
>Cc: Grant Likely <grant.likely@...aro.org>
>Cc: Rob Herring <robh+dt@...nel.org>
>Signed-off-by: Liviu Dudau <Liviu.Dudau@....com>
>---
> drivers/pci/pci.c | 3 +++
> 1 file changed, 3 insertions(+)
>
>diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
>index 1c8592b..29d1775 100644
>--- a/drivers/pci/pci.c
>+++ b/drivers/pci/pci.c
>@@ -17,6 +17,7 @@
> #include <linux/spinlock.h>
> #include <linux/string.h>
> #include <linux/log2.h>
>+#include <linux/of_pci.h>
> #include <linux/pci-aspm.h>
> #include <linux/pm_wakeup.h>
> #include <linux/interrupt.h>
>@@ -1453,6 +1454,8 @@ EXPORT_SYMBOL(pcim_pin_device);
>  */
> int __weak pcibios_add_device(struct pci_dev *dev)
> {
>+	dev->irq = of_irq_parse_and_map_pci(dev, 0, 0);
>+
> 	return 0;
> }

Liviu,

For this, my suggestion is to add arch dependent function to setup the irq
line for pci devices. I can't find an obvious reason this won't work on other
archs, but maybe this will hurt some of them?

>
>-- 
>2.0.4
>
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-- 
Richard Yang
Help you, Help me

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