[src/trunk]: src/sys/dev/fdt Support rescan and child detachment

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

details:   https://anonhg.NetBSD.org/src/rev/ffa8cb6be962
branches:  trunk
changeset: 433607:ffa8cb6be962
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Sun Sep 23 19:32:03 2018 +0000

description:
Support rescan and child detachment

diffstat:

 sys/dev/fdt/fdtbus.c |  35 ++++++++++++++++++++++++++++++-----
 1 files changed, 30 insertions(+), 5 deletions(-)

diffs (84 lines):

diff -r 9063bbd47212 -r ffa8cb6be962 sys/dev/fdt/fdtbus.c
--- a/sys/dev/fdt/fdtbus.c      Sun Sep 23 19:07:10 2018 +0000
+++ b/sys/dev/fdt/fdtbus.c      Sun Sep 23 19:32:03 2018 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: fdtbus.c,v 1.23 2018/09/09 21:14:04 jmcneill Exp $ */
+/* $NetBSD: fdtbus.c,v 1.24 2018/09/23 19:32:03 jmcneill Exp $ */
 
 /*-
  * Copyright (c) 2015 Jared D. McNeill <jmcneill%invisible.ca@localhost>
@@ -27,7 +27,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: fdtbus.c,v 1.23 2018/09/09 21:14:04 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: fdtbus.c,v 1.24 2018/09/23 19:32:03 jmcneill Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -70,6 +70,9 @@
 
 static int     fdt_match(device_t, cfdata_t, void *);
 static void    fdt_attach(device_t, device_t, void *);
+static int     fdt_rescan(device_t, const char *, const int *);
+static void    fdt_childdet(device_t, device_t);
+
 static int     fdt_scan_submatch(device_t, cfdata_t, const int *, void *);
 static void    fdt_scan(struct fdt_softc *, int);
 static void    fdt_add_node(struct fdt_node *);
@@ -78,8 +81,8 @@
 static const char * const fdtbus_compatible[] =
     { "simple-bus", "simple-mfd", NULL };
 
-CFATTACH_DECL_NEW(simplebus, sizeof(struct fdt_softc),
-    fdt_match, fdt_attach, NULL, NULL);
+CFATTACH_DECL2_NEW(simplebus, sizeof(struct fdt_softc),
+    fdt_match, fdt_attach, NULL, NULL, fdt_rescan, fdt_childdet);
 
 static int
 fdt_match(device_t parent, cfdata_t cf, void *aux)
@@ -112,7 +115,6 @@
        const struct fdt_attach_args *faa = aux;
        const int phandle = faa->faa_phandle;
        const char *descr;
-       int pass;
 
        sc->sc_dev = self;
        sc->sc_phandle = phandle;
@@ -134,6 +136,15 @@
                return;
 
        /* Scan devices */
+       fdt_rescan(self, NULL, NULL);
+}
+
+static int
+fdt_rescan(device_t self, const char *ifattr, const int *locs)
+{
+       struct fdt_softc *sc = device_private(self);
+       int pass;
+
        pass = 0;
        fdt_need_rescan = false;
        do {
@@ -145,6 +156,20 @@
                        pass++;
                }
        } while (pass <= FDTCF_PASS_DEFAULT);
+
+       return 0;
+}
+
+static void
+fdt_childdet(device_t parent, device_t child)
+{
+       struct fdt_node *node;
+
+       TAILQ_FOREACH(node, &fdt_nodes, n_nodes)
+               if (node->n_dev == child) {
+                       node->n_dev = NULL;
+                       break;
+               }
 }
 
 static void