Add dev_read_pci_bus_range() to read bus-range property values
Signed-off-by: Stefan Roese <s...@denx.de>
Cc: Simon Glass <s...@chromium.org>
---
Changes in v2:
- New patch
drivers/core/read.c | 17 +++++++++++++++++
include/dm/read.h | 12 ++++++++++++
2 files changed, 29 insertions(+)
diff --git a/drivers/core/read.c b/drivers/core/read.c
index 8bb456bc3f..86f3f88170 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 @@ int dev_get_child_count(const struct udevice *dev)
{
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;
+}
diff --git a/include/dm/read.h b/include/dm/read.h
index 487ec9e9c9..ac7ec5dd79 100644
--- a/include/dm/read.h
+++ b/include/dm/read.h
@@ -680,6 +680,18 @@ int dev_read_alias_highest_id(const char *stem);
*/
int dev_get_child_count(const struct udevice *dev);
+/**
+ * dev_read_pci_bus_range - Read PCI bus-range resource
+ *
+ * Look at the bus range property of a device node and return the pci bus
+ * range for this node.
+ *
+ * @dev: device to examine
+ * @res returns the resource
+ * @return 0 if ok, negative on error
+ */
+int dev_read_pci_bus_range(const struct udevice *dev, struct resource *res);
+
#else /* CONFIG_DM_DEV_READ_INLINE is enabled */
static inline int dev_read_u32(const struct udevice *dev,
--
2.28.0
