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Index: sys/dev/spibus/spigen.c
===================================================================
--- sys/dev/spibus/spigen.c
+++ sys/dev/spibus/spigen.c
@@ -64,6 +64,7 @@
struct spigen_softc {
device_t sc_dev;
struct cdev *sc_cdev;
+ struct cdev *sc_adev; /* alias device */
struct mtx sc_mtx;
uint32_t sc_command_length_max; /* cannot change while mmapped */
uint32_t sc_data_length_max; /* cannot change while mmapped */
@@ -186,11 +187,39 @@
{
struct spigen_softc *sc;
const int unit = device_get_unit(dev);
+ int cs, res;
+ struct make_dev_args mda;
+
+ spibus_get_cs(dev, &cs);
+ cs &= ~SPIBUS_CS_HIGH; /* trim 'cs high' bit */
sc = device_get_softc(dev);
sc->sc_dev = dev;
- sc->sc_cdev = make_dev(&spigen_cdevsw, unit,
- UID_ROOT, GID_OPERATOR, 0660, "spigen%d", unit);
+
+ make_dev_args_init(&mda);
+ mda.mda_flags = 0; /* see make_dev in kern_conf.c */
+ mda.mda_devsw = &spigen_cdevsw;
+ mda.mda_cr = NULL; /* see make_dev in kern_conf.c */
+ mda.mda_uid = UID_ROOT;
+ mda.mda_gid = GID_OPERATOR;
+ mda.mda_mode = 0660;
+ mda.mda_unit = unit;
+
+ res = make_dev_s(&mda, &(sc->sc_cdev), "spigen%d", unit);
+ if (res) {
+ return res;
+ }
+
+ res = make_dev_alias_p(0, &(sc->sc_adev), sc->sc_cdev, "spigen%d.%d",
+ device_get_unit(device_get_parent(dev)), cs);
+ if (res) {
+ if (sc->sc_cdev) { /* TODO: should I just rely on 'detach' to do this? */
+ destroy_dev(sc->sc_cdev);
+ sc->sc_cdev = NULL;
+ }
+ return res;
+ }
+
sc->sc_cdev->si_drv1 = dev;
sc->sc_command_length_max = PAGE_SIZE;
sc->sc_data_length_max = PAGE_SIZE;
@@ -429,8 +458,11 @@
mtx_destroy(&sc->sc_mtx);
- if (sc->sc_cdev)
- destroy_dev(sc->sc_cdev);
+ if (sc->sc_adev)
+ destroy_dev(sc->sc_adev);
+
+ if (sc->sc_cdev)
+ destroy_dev(sc->sc_cdev);
return (0);
}

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