git: 53b5393319dd - main - uart_snps: Register a device xref for UARTs

The branch main has been updated by khng:

URL: https://cgit.FreeBSD.org/src/commit/?id=53b5393319dd7b54d63e8bf9aa82e48618552ecb

commit 53b5393319dd7b54d63e8bf9aa82e48618552ecb
Author:     Ka Ho Ng <khng@FreeBSD.org>
AuthorDate: 2024-04-12 16:56:42 +0000
Commit:     Ka Ho Ng <khng@FreeBSD.org>
CommitDate: 2024-04-12 17:04:23 +0000

    uart_snps: Register a device xref for UARTs
    
    This is useful for other drivers to be able to find the UART (such as
    the case of UARTs where hardware flow control lines are handled by
    another device.)
    
    Sponsored by:   Juniper Networks, Inc.
    MFC after:      1 week
    Reviewed by:    imp
    Differential Revision:  https://reviews.freebsd.org/D44532
---
 sys/dev/uart/uart_dev_snps.c | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/sys/dev/uart/uart_dev_snps.c b/sys/dev/uart/uart_dev_snps.c
index b6efd1948b3e..6067920e3c2a 100644
--- a/sys/dev/uart/uart_dev_snps.c
+++ b/sys/dev/uart/uart_dev_snps.c
@@ -223,6 +223,22 @@ snps_probe(device_t dev)
 	return (BUS_PROBE_VENDOR);
 }
 
+static int
+snps_attach(device_t dev)
+{
+	phandle_t node;
+	int ret;
+
+	ret = uart_bus_attach(dev);
+	if (ret == 0) {
+		node = ofw_bus_get_node(dev);
+		/* Set up phandle to dev mapping */
+		OF_device_register_xref(OF_xref_from_node(node), dev);
+	}
+
+	return (ret);
+}
+
 static int
 snps_detach(device_t dev)
 {
@@ -269,7 +285,7 @@ snps_detach(device_t dev)
 static device_method_t snps_bus_methods[] = {
 	/* Device interface */
 	DEVMETHOD(device_probe,		snps_probe),
-	DEVMETHOD(device_attach,	uart_bus_attach),
+	DEVMETHOD(device_attach,	snps_attach),
 	DEVMETHOD(device_detach, 	snps_detach),
 	DEVMETHOD_END
 };