PCI: Move Open Firmware devspec attribute to PCI common code

Move the devspec OF attribute to PCI common code's set of device attributes
since it's not architecture dependent.  As a side effect microblaze and
powerpc no longer need to use pcibios_add_platform_entries().

[bhelgaas: fold in #include for compile error]
Link: https://lkml.kernel.org/r/alpine.LFD.2.11.1404141101500.1529@denkbrett
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 18 insertions, 0 deletions

diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index 4e0acefb7565..3db1c7ff5dd3 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -29,6 +29,7 @@
 #include <linux/slab.h>
 #include <linux/vgaarb.h>
 #include <linux/pm_runtime.h>
+#include <linux/of.h>
 #include "pci.h"
 
 static int sysfs_initialized;   /* = 0 */
@@ -416,6 +417,20 @@ static ssize_t d3cold_allowed_show(struct device *dev,
 static DEVICE_ATTR_RW(d3cold_allowed);
 #endif
 
+#ifdef CONFIG_OF
+static ssize_t devspec_show(struct device *dev,
+                            struct device_attribute *attr, char *buf)
+{
+        struct pci_dev *pdev = to_pci_dev(dev);
+        struct device_node *np = pci_device_to_OF_node(pdev);
+
+        if (np == NULL || np->full_name == NULL)
+                return 0;
+        return sprintf(buf, "%s", np->full_name);
+}
+static DEVICE_ATTR_RO(devspec);
+#endif
+
 #ifdef CONFIG_PCI_IOV
 static ssize_t sriov_totalvfs_show(struct device *dev,
                                    struct device_attribute *attr,
@@ -521,6 +536,9 @@ static struct attribute *pci_dev_attrs[] = {
 #if defined(CONFIG_PM_RUNTIME) && defined(CONFIG_ACPI)
         &dev_attr_d3cold_allowed.attr,
 #endif
+#ifdef CONFIG_OF
+        &dev_attr_devspec.attr,
+#endif
         NULL,
 };