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usb: onboard-hub: Use the ofnode to check if the peer-hub was probed

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Currently the check in usb_onboard_hub_bind is relying on specific
compatible string for the Michrochip USB5744. Replace this with
more generic approach that will allow to add new types of devices
to the of_match table. Because the driver only needs to bind one
"half" of the hub, the peer-hub node is used to find out if it
was already done. In case peer-hub was bound, -ENODEV is returned.

Reviewed-by: Quentin Schulz <quentin.schulz@cherry.de>
Signed-off-by: Lukasz Czechowski <lukasz.czechowski@thaumatec.com>
This commit is contained in:
Lukasz Czechowski 2025-07-22 11:55:33 +02:00 committed by Tom Rini
parent 5a8dd2e0c8
commit a4446e13db
1 changed files with 10 additions and 5 deletions
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15
common/usb_onboard_hub.c
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@ -10,6 +10,7 @@
#include <asm/gpio.h>
#include <dm.h>
#include <dm/device_compat.h>
#include <dm/uclass-internal.h>
#include <i2c.h>
#include <linux/delay.h>
#include <power/regulator.h>
@ -179,8 +180,8 @@ err:
static int usb_onboard_hub_bind(struct udevice *dev)
{
struct ofnode_phandle_args phandle;
const void *fdt = gd->fdt_blob;
int ret, off;
struct udevice *peerdev;
int ret;
ret = dev_read_phandle_with_args(dev, "peer-hub", NULL, 0, 0, &phandle);
if (ret == -ENOENT) {
@ -193,10 +194,14 @@ static int usb_onboard_hub_bind(struct udevice *dev)
return ret;
}
off = ofnode_to_offset(phandle.node);
ret = fdt_node_check_compatible(fdt, off, "usb424,5744");
if (!ret)
ret = uclass_find_device_by_ofnode(UCLASS_USB_HUB, phandle.node, &peerdev);
if (ret) {
dev_dbg(dev, "binding before peer-hub %s\n",
ofnode_get_name(phandle.node));
return 0;
}
dev_dbg(dev, "peer-hub %s has been bound\n", peerdev->name);
return -ENODEV;
}