mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-30 10:39:04 +00:00
79 lines
2.4 KiB
Diff
79 lines
2.4 KiB
Diff
From 45ab9702fb47d18dca116b3a0509efa19fbcb27a Mon Sep 17 00:00:00 2001
|
|
From: Thierry Reding <thierry.reding@avionic-design.de>
|
|
Date: Thu, 16 May 2013 17:55:18 +0200
|
|
Subject: [PATCH] of/pci: Add of_pci_get_devfn() function
|
|
|
|
commit 45ab9702fb47d18dca116b3a0509efa19fbcb27a upstream.
|
|
|
|
This function can be used to parse the device and function number from a
|
|
standard 5-cell PCI resource. PCI_SLOT() and PCI_FUNC() can be used on
|
|
the returned value obtain the device and function numbers respectively.
|
|
|
|
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
|
|
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
|
|
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
|
|
---
|
|
drivers/of/of_pci.c | 34 +++++++++++++++++++++++++++++-----
|
|
include/linux/of_pci.h | 1 +
|
|
2 files changed, 30 insertions(+), 5 deletions(-)
|
|
|
|
--- a/drivers/of/of_pci.c
|
|
+++ b/drivers/of/of_pci.c
|
|
@@ -5,14 +5,15 @@
|
|
#include <asm/prom.h>
|
|
|
|
static inline int __of_pci_pci_compare(struct device_node *node,
|
|
- unsigned int devfn)
|
|
+ unsigned int data)
|
|
{
|
|
- unsigned int size;
|
|
- const __be32 *reg = of_get_property(node, "reg", &size);
|
|
+ int devfn;
|
|
|
|
- if (!reg || size < 5 * sizeof(__be32))
|
|
+ devfn = of_pci_get_devfn(node);
|
|
+ if (devfn < 0)
|
|
return 0;
|
|
- return ((be32_to_cpup(®[0]) >> 8) & 0xff) == devfn;
|
|
+
|
|
+ return devfn == data;
|
|
}
|
|
|
|
struct device_node *of_pci_find_child_device(struct device_node *parent,
|
|
@@ -40,3 +41,26 @@ struct device_node *of_pci_find_child_de
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL_GPL(of_pci_find_child_device);
|
|
+
|
|
+/**
|
|
+ * of_pci_get_devfn() - Get device and function numbers for a device node
|
|
+ * @np: device node
|
|
+ *
|
|
+ * Parses a standard 5-cell PCI resource and returns an 8-bit value that can
|
|
+ * be passed to the PCI_SLOT() and PCI_FUNC() macros to extract the device
|
|
+ * and function numbers respectively. On error a negative error code is
|
|
+ * returned.
|
|
+ */
|
|
+int of_pci_get_devfn(struct device_node *np)
|
|
+{
|
|
+ unsigned int size;
|
|
+ const __be32 *reg;
|
|
+
|
|
+ reg = of_get_property(np, "reg", &size);
|
|
+
|
|
+ if (!reg || size < 5 * sizeof(__be32))
|
|
+ return -EINVAL;
|
|
+
|
|
+ return (be32_to_cpup(reg) >> 8) & 0xff;
|
|
+}
|
|
+EXPORT_SYMBOL_GPL(of_pci_get_devfn);
|
|
--- a/include/linux/of_pci.h
|
|
+++ b/include/linux/of_pci.h
|
|
@@ -10,5 +10,6 @@ int of_irq_map_pci(const struct pci_dev
|
|
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);
|
|
|
|
#endif
|