linux-kernel - [PATCH 2/2] of: treat PCI config space as IORESOURCE

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Date:	Sat, 31 May 2014 01:36:41 +0100
From:	Liviu Dudau <Liviu.Dudau@....com>
To:	Bjorn Helgaas <bhelgaas@...gle.com>
Cc:	Kumar Gala <galak@...eaurora.org>,
	Rob Herring <robherring2@...il.com>,
	Rob Herring <robh+dt@...nel.org>,
	Grant Likely <grant.likely@...aro.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	linux-arm-msm <linux-arm-msm@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Kishon Vijay Abraham I <kishon@...com>
Subject: [PATCH 2/2] of: treat PCI config space as IORESOURCE_MEM type with special flags.

If we have a PCI config space specified in something like a ranges
property we should treat it as memory type resource. Use the
IORESOURCE_ECFG bit to distinguish the config space from standard
IORESOURCE_MEM resources.

Signed-off-by: Kumar Gama <galak@...eaurora.org>
[Updated commit log and added IORESOURCE_ECFG bit]
Signed-off-by: Liviu Dudau <Liviu.Dudau@....com>
---
 drivers/of/address.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/of/address.c b/drivers/of/address.c
index 2fcfbae..877e9e5 100644
--- a/drivers/of/address.c
+++ b/drivers/of/address.c
@@ -123,6 +123,9 @@ static unsigned int of_bus_pci_get_flags(const __be32 *addr)
 	u32 w = be32_to_cpup(addr);
 
 	switch((w >> 24) & 0x03) {
+	case 0x00: /* cfg space */
+		flags |= IORESOURCE_MEM | IORESOURCE_PCI_ECFG;
+		break;
 	case 0x01:
 		flags |= IORESOURCE_IO;
 		break;
-- 
1.9.2

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