Hi Simon,
On 28.07.20 21:01, Simon Glass wrote:
On Fri, 24 Jul 2020 at 04:09, Stefan Roese <s...@denx.de> wrote:
From: Suneel Garapati <sgarap...@marvell.com>
Add fdtdec_get_pci_bus_range to read bus-range property
values.
Signed-off-by: Suneel Garapati <sgarap...@marvell.com>
Cc: Simon Glass <s...@chromium.org>
Signed-off-by: Stefan Roese <s...@denx.de>
---
Changes in v1:
- Added return value description to function prototype in header
- Changed from using be32_to_cpup() to fdt32_to_cpu()
include/fdtdec.h | 13 +++++++++++++
lib/fdtdec.c | 16 ++++++++++++++++
2 files changed, 29 insertions(+)
Reviewed-by: Simon Glass <s...@chromium.org>
Is the address always 32-bit?
Yes, I think so. Its done in a similar way in the Linux kernel.
Thanks,
Stefan
diff --git a/include/fdtdec.h b/include/fdtdec.h
index 760b392bdf..f6759c7f8e 100644
--- a/include/fdtdec.h
+++ b/include/fdtdec.h
@@ -444,6 +444,19 @@ int fdtdec_get_pci_vendev(const void *blob, int node,
int fdtdec_get_pci_bar32(const struct udevice *dev, struct fdt_pci_addr *addr,
u32 *bar);
+/**
+ * Look at the bus range property of a device node and return the pci bus
+ * range for this node.
+ * The property must hold one fdt_pci_addr with a length.
+ * @param blob FDT blob
+ * @param node node to examine
+ * @param res the resource structure to return the bus range
+ * @return 0 if ok, negative on error
+ */
+
+int fdtdec_get_pci_bus_range(const void *blob, int node,
+ struct fdt_resource *res);
+
/**
* Look up a 32-bit integer property in a node and return it. The property
* must have at least 4 bytes of data. The value of the first cell is
diff --git a/lib/fdtdec.c b/lib/fdtdec.c
index 78576b530f..0b40fa374a 100644
--- a/lib/fdtdec.c
+++ b/lib/fdtdec.c
@@ -242,6 +242,22 @@ int fdtdec_get_pci_bar32(const struct udevice *dev, struct
fdt_pci_addr *addr,
return 0;
}
+
+int fdtdec_get_pci_bus_range(const void *blob, int node,
+ struct fdt_resource *res)
+{
+ const u32 *values;
+ int len;
+
+ values = fdt_getprop(blob, node, "bus-range", &len);
+ if (!values || len < sizeof(*values) * 2)
+ return -EINVAL;
+
+ res->start = fdt32_to_cpu(*values++);
+ res->end = fdt32_to_cpu(*values);
+
+ return 0;
+}
#endif
uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name,
--
2.27.0
Viele Grüße,
Stefan
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Phone: (+49)-8142-66989-51 Fax: (+49)-8142-66989-80 Email: s...@denx.de
