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net: phy: Add new read ethernet phy id function

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Add new function to get ethernet phy id from compatible property
of the mdio phy node.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: T Karthik Reddy <t.karthik.reddy@xilinx.com>
Link: https://lore.kernel.org/r/16019efb3820a50330935fdaae191cec1f101b5c.1645627539.git.michal.simek@xilinx.com
This commit is contained in:
Michal Simek 2022-02-23 15:45:40 +01:00
parent d24b3e32ab
commit db681d4929
2 changed files with 49 additions and 0 deletions
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36
drivers/core/ofnode.c
View file

@ -898,6 +898,42 @@ int ofnode_read_pci_vendev(ofnode node, u16 *vendor, u16 *device)
return -ENOENT;
}
int ofnode_read_eth_phy_id(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("ethernet-phy-idVVVV,DDDD")) {
char *s = strstr(list, "ethernet-phy-id");
/*
* check if the string is something like
* ethernet-phy-idVVVV,DDDD
*/
if (s && s[19] == '.') {
s += strlen("ethernet-phy-id");
*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

@ -894,6 +894,19 @@ int ofnode_read_pci_addr(ofnode node, enum fdt_pci_space type,
*/
int ofnode_read_pci_vendev(ofnode node, u16 *vendor, u16 *device);
/**
* ofnode_read_eth_phy_id() - look up eth phy vendor and device id
*
* Look at the compatible property of a device node that represents a eth phy
* device and extract phy vendor id and device id from it.
*
* @param node node to examine
* @param vendor vendor id of the eth phy device
* @param device device id of the eth phy device
* @return 0 if ok, negative on error
*/
int ofnode_read_eth_phy_id(ofnode node, u16 *vendor, u16 *device);
/**
* ofnode_read_addr_cells() - Get the number of address cells for a node
*