dm: core: Add API to read PCI bus-range property
Add dev_read_pci_bus_range() to read bus-range property values
Signed-off-by: Stefan Roese <sr@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/core/read.c b/drivers/core/read.c
index 8bb456b..86f3f88 100644
--- a/drivers/core/read.c
+++ b/drivers/core/read.c
@@ -10,6 +10,7 @@
#include <mapmem.h>
#include <asm/types.h>
#include <asm/io.h>
+#include <linux/ioport.h>
int dev_read_u32(const struct udevice *dev, const char *propname, u32 *outp)
{
@@ -359,3 +360,19 @@
{
return ofnode_get_child_count(dev_ofnode(dev));
}
+
+int dev_read_pci_bus_range(const struct udevice *dev,
+ struct resource *res)
+{
+ const u32 *values;
+ int len;
+
+ values = dev_read_prop(dev, "bus-range", &len);
+ if (!values || len < sizeof(*values) * 2)
+ return -EINVAL;
+
+ res->start = *values++;
+ res->end = *values;
+
+ return 0;
+}