Merge remote-tracking branch 'dt-rh/for-next'

[karo-tx-linux.git] / drivers / of / of_pci.c

diff --git a/drivers/of/of_pci.c b/drivers/of/of_pci.c
index ea7c2b6dfc56191876e56b7602934b1c11e963e9..ff27177f49edbdd3105b319c7deee29ed48da869 100644 (file)
--- a/drivers/of/of_pci.c
+++ b/drivers/of/of_pci.c
@@ -5,6 +5,7 @@
 #include <linux/of_device.h>
 #include <linux/of_pci.h>
 #include <linux/slab.h>
+#include <asm-generic/pci-bridge.h>
 
 static inline int __of_pci_pci_compare(struct device_node *node,
                                       unsigned int data)
@@ -117,6 +118,31 @@ int of_get_pci_domain_nr(struct device_node *node)
 }
 EXPORT_SYMBOL_GPL(of_get_pci_domain_nr);
 
+/**
+ * of_pci_check_probe_only - Setup probe only mode if linux,pci-probe-only
+ *                           is present and valid
+ */
+void of_pci_check_probe_only(void)
+{
+       u32 val;
+       int ret;
+
+       ret = of_property_read_u32(of_chosen, "linux,pci-probe-only", &val);
+       if (ret) {
+               if (ret == -ENODATA || ret == -EOVERFLOW)
+                       pr_warn("linux,pci-probe-only without valid value, ignoring\n");
+               return;
+       }
+
+       if (val)
+               pci_add_flags(PCI_PROBE_ONLY);
+       else
+               pci_clear_flags(PCI_PROBE_ONLY);
+
+       pr_info("PCI: PROBE_ONLY %sabled\n", val ? "en" : "dis");
+}
+EXPORT_SYMBOL_GPL(of_pci_check_probe_only);
+
 /**
  * of_pci_dma_configure - Setup DMA configuration
  * @dev: ptr to pci_dev struct of the PCI device