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fdtdec: Add API to read pci bus-range property

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Add fdtdec_get_pci_bus_range to read bus-range property
values.

Signed-off-by: Suneel Garapati <sgarapati@marvell.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Suneel Garapati 2019-10-19 15:19:35 -07:00 committed by Stefan Roese
parent 1aa3966173
commit 1db7ee464f
2 changed files with 29 additions and 0 deletions
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13
include/fdtdec.h
View File

@ -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

16
lib/fdtdec.c
View File

@ -243,6 +243,22 @@ 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,