[src/trunk]: src/sys Add device_attached_to_iattr(), which return true if the...

[thorpej <thorpej%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/db9ac5a69078
branches:  trunk
changeset: 951516:db9ac5a69078
user:      thorpej <thorpej%NetBSD.org@localhost>
date:      Thu Feb 04 23:29:16 2021 +0000

description:
Add device_attached_to_iattr(), which return true if the device
attached to the specified interface attribute.

diffstat:

 sys/kern/subr_device.c |  26 +++++++++++++++++++++++---
 sys/sys/device.h       |   3 ++-
 2 files changed, 25 insertions(+), 4 deletions(-)

diffs (70 lines):

diff -r a7f74950c07e -r db9ac5a69078 sys/kern/subr_device.c
--- a/sys/kern/subr_device.c    Thu Feb 04 22:55:36 2021 +0000
+++ b/sys/kern/subr_device.c    Thu Feb 04 23:29:16 2021 +0000
@@ -1,7 +1,7 @@
-/*     $NetBSD: subr_device.c,v 1.4 2021/01/28 15:53:46 thorpej Exp $  */
+/*     $NetBSD: subr_device.c,v 1.5 2021/02/04 23:29:16 thorpej Exp $  */
 
 /*
- * Copyright (c) 2006 The NetBSD Foundation, Inc.
+ * Copyright (c) 2006, 2021 The NetBSD Foundation, Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -27,7 +27,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: subr_device.c,v 1.4 2021/01/28 15:53:46 thorpej Exp $");
+__KERNEL_RCSID(0, "$NetBSD: subr_device.c,v 1.5 2021/02/04 23:29:16 thorpej Exp $");
 
 #include <sys/param.h>
 #include <sys/device.h>
@@ -39,6 +39,7 @@
 /*
  * Accessor functions for the device_t type.
  */
+
 devclass_t
 device_class(device_t dev)
 {
@@ -182,3 +183,22 @@
 
        return strcmp(dev->dv_cfdriver->cd_name, dname) == 0;
 }
+
+/*
+ * device_attached_to_iattr:
+ *
+ *     Returns true if the device attached to the specified interface
+ *     attribute.
+ */
+bool
+device_attached_to_iattr(device_t dev, const char *iattr)
+{
+       cfdata_t cfdata = device_cfdata(dev);
+       const struct cfparent *pspec;
+
+       if (cfdata == NULL || (pspec = cfdata->cf_pspec) == NULL) {
+               return false;
+       }
+
+       return strcmp(pspec->cfp_iattr, iattr) == 0;
+}
diff -r a7f74950c07e -r db9ac5a69078 sys/sys/device.h
--- a/sys/sys/device.h  Thu Feb 04 22:55:36 2021 +0000
+++ b/sys/sys/device.h  Thu Feb 04 23:29:16 2021 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: device.h,v 1.164 2021/01/27 04:54:08 thorpej Exp $ */
+/* $NetBSD: device.h,v 1.165 2021/02/04 23:29:16 thorpej Exp $ */
 
 /*
  * Copyright (c) 1996, 2000 Christopher G. Demetriou
@@ -544,6 +544,7 @@
                                         void (*)(device_t, devactive_t));
 
 bool           device_is_a(device_t, const char *);
+bool           device_attached_to_iattr(device_t, const char *);
 
 device_t       device_find_by_xname(const char *);
 device_t       device_find_by_driver_unit(const char *, int);