From: Thierry Reding <thierry.reding@avionic-design.de>
To: Grant Likely <grant.likely@secretlab.ca>,
Rob Herring <rob.herring@calxeda.com>,
Stephen Warren <swarren@wwwdotorg.org>,
Bjorn Helgaas <bhelgaas@google.com>
Cc: Russell King <linux@arm.linux.org.uk>,
Andrew Murray <andrew.murray@arm.com>,
Jason Gunthorpe <jgunthorpe@obsidianresearch.com>,
Arnd Bergmann <arnd@arndb.de>,
Thomas Petazzoni <thomas.petazzoni@free-electrons.com>,
devicetree-discuss@lists.ozlabs.org,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-tegra@vger.kernel.org, linux-pci@vger.kernel.org
Subject: [PATCH v3 03/12] of/pci: Add of_pci_parse_bus_range() function
Date: Wed, 3 Apr 2013 16:45:09 +0200 [thread overview]
Message-ID: <1365000318-28256-4-git-send-email-thierry.reding@avionic-design.de> (raw)
In-Reply-To: <1365000318-28256-1-git-send-email-thierry.reding@avionic-design.de>
This function can be used to parse a bus-range property as specified by
device nodes representing PCI bridges.
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
---
drivers/of/of_pci.c | 25 +++++++++++++++++++++++++
include/linux/of_pci.h | 1 +
2 files changed, 26 insertions(+)
diff --git a/drivers/of/of_pci.c b/drivers/of/of_pci.c
index 4dd7b9b..42c687a 100644
--- a/drivers/of/of_pci.c
+++ b/drivers/of/of_pci.c
@@ -64,3 +64,28 @@ int of_pci_get_devfn(struct device_node *np)
return (be32_to_cpup(reg) >> 8) & 0xff;
}
EXPORT_SYMBOL_GPL(of_pci_get_devfn);
+
+/**
+ * of_pci_parse_bus_range() - parse the bus-range property of a PCI device
+ * @node: device node
+ * @res: address to a struct resource to return the bus-range
+ *
+ * Returns 0 on success or a negative error-code on failure.
+ */
+int of_pci_parse_bus_range(struct device_node *node, struct resource *res)
+{
+ const __be32 *values;
+ int len;
+
+ values = of_get_property(node, "bus-range", &len);
+ if (!values || len < sizeof(*values) * 2)
+ return -EINVAL;
+
+ res->name = node->name;
+ res->start = be32_to_cpup(values++);
+ res->end = be32_to_cpup(values);
+ res->flags = IORESOURCE_BUS;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(of_pci_parse_bus_range);
diff --git a/include/linux/of_pci.h b/include/linux/of_pci.h
index 91ec484..7a04826 100644
--- a/include/linux/of_pci.h
+++ b/include/linux/of_pci.h
@@ -11,5 +11,6 @@ struct device_node;
struct device_node *of_pci_find_child_device(struct device_node *parent,
unsigned int devfn);
int of_pci_get_devfn(struct device_node *np);
+int of_pci_parse_bus_range(struct device_node *node, struct resource *res);
#endif
--
1.8.2
next prev parent reply other threads:[~2013-04-03 14:45 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-03 14:45 [PATCH v3 00/12] Rewrite Tegra PCIe driver Thierry Reding
2013-04-03 14:45 ` [PATCH v3 01/12] of/pci: Provide support for parsing PCI DT ranges property Thierry Reding
2013-04-03 14:45 ` [PATCH v3 02/12] of/pci: Add of_pci_get_devfn() function Thierry Reding
2013-04-03 14:45 ` Thierry Reding [this message]
2013-04-03 14:45 ` [PATCH v3 04/12] PCI: Introduce new MSI chip infrastructure Thierry Reding
2013-04-03 14:45 ` [PATCH v3 05/12] ARM: tegra: Move tegra_pcie_xclk_clamp() to PMC Thierry Reding
2013-04-03 14:45 ` [PATCH v3 06/12] ARM: tegra: Move pmc.h to include/linux/tegra-pmc.h Thierry Reding
2013-04-03 14:45 ` [PATCH v3 07/12] PCI: tegra: Move PCIe driver to drivers/pci/host Thierry Reding
2013-04-04 21:28 ` Stephen Warren
2013-04-04 21:30 ` Stephen Warren
2013-04-05 6:03 ` Thierry Reding
2013-04-10 22:46 ` Stephen Warren
2013-04-05 7:37 ` Thierry Reding
2013-04-05 7:53 ` Thierry Reding
2013-04-10 23:05 ` Stephen Warren
2013-04-15 18:28 ` Stephen Warren
2013-06-12 12:30 ` Thierry Reding
2013-06-12 16:09 ` Stephen Warren
2013-06-12 21:23 ` Thierry Reding
2013-04-03 14:45 ` [PATCH v3 08/12] ARM: tegra: tamonten: Add PCIe support Thierry Reding
2013-04-03 14:45 ` [PATCH v3 09/12] ARM: tegra: tec: " Thierry Reding
2013-04-03 14:45 ` [PATCH v3 10/12] ARM: tegra: harmony: Initialize PCIe from DT Thierry Reding
2013-04-03 14:45 ` [PATCH v3 11/12] ARM: tegra: trimslice: " Thierry Reding
2013-04-03 14:45 ` [PATCH v3 12/12] ARM: tegra: Update default configuration (PCIe) Thierry Reding
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