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dm: core: Add ofnode function to read PCI vendor and device id

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We don't have the live-tree version of fdtdec_get_pci_vendev().
This adds the API.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Bin Meng 2018-08-03 01:14:35 -07:00 committed by Simon Glass
parent d494131bc6
commit 7b9cbaddd5
2 changed files with 49 additions and 0 deletions
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36
drivers/core/ofnode.c
View File

@ -623,6 +623,42 @@ fail:
return ret;
}
int ofnode_read_pci_vendev(ofnode node, u16 *vendor, u16 *device)
{
const char *list, *end;
int len;
list = ofnode_get_property(node, "compatible", &len);
if (!list)
return -ENOENT;
end = list + len;
while (list < end) {
len = strlen(list);
if (len >= strlen("pciVVVV,DDDD")) {
char *s = strstr(list, "pci");
/*
* check if the string is something like pciVVVV,DDDD.RR
* or just pciVVVV,DDDD
*/
if (s && s[7] == ',' &&
(s[12] == '.' || s[12] == 0)) {
s += 3;
*vendor = simple_strtol(s, NULL, 16);
s += 5;
*device = simple_strtol(s, NULL, 16);
return 0;
}
}
list += (len + 1);
}
return -ENOENT;
}
int ofnode_read_addr_cells(ofnode node)
{
if (ofnode_is_np(node))

13
include/dm/ofnode.h
View File

@ -585,6 +585,19 @@ const uint8_t *ofnode_read_u8_array_ptr(ofnode node, const char *propname,
int ofnode_read_pci_addr(ofnode node, enum fdt_pci_space type,
const char *propname, struct fdt_pci_addr *addr);
/**
* ofnode_read_pci_vendev() - look up PCI vendor and device id
*
* Look at the compatible property of a device node that represents a PCI
* device and extract pci vendor id and device id from it.
*
* @param node node to examine
* @param vendor vendor id of the pci device
* @param device device id of the pci device
* @return 0 if ok, negative on error
*/
int ofnode_read_pci_vendev(ofnode node, u16 *vendor, u16 *device);
/**
* ofnode_read_addr_cells() - Get the number of address cells for a node
*