[src/trunk]: src/sys/dev/ic Allow bus glue to reserve pins for private use

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

details:   https://anonhg.NetBSD.org/src/rev/43e8b0155805
branches:  trunk
changeset: 836523:43e8b0155805
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Sun Oct 21 18:31:14 2018 +0000

description:
Allow bus glue to reserve pins for private use

diffstat:

 sys/dev/ic/pl061.c    |  7 ++++---
 sys/dev/ic/pl061var.h |  4 +++-
 2 files changed, 7 insertions(+), 4 deletions(-)

diffs (46 lines):

diff -r dc3aa7776521 -r 43e8b0155805 sys/dev/ic/pl061.c
--- a/sys/dev/ic/pl061.c        Sun Oct 21 13:41:15 2018 +0000
+++ b/sys/dev/ic/pl061.c        Sun Oct 21 18:31:14 2018 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: pl061.c,v 1.1 2018/10/15 23:50:48 jmcneill Exp $ */
+/* $NetBSD: pl061.c,v 1.2 2018/10/21 18:31:14 jmcneill Exp $ */
 
 /*
  * Copyright (c) 2018 Jonathan A. Kollasch
@@ -27,7 +27,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: pl061.c,v 1.1 2018/10/15 23:50:48 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pl061.c,v 1.2 2018/10/21 18:31:14 jmcneill Exp $");
 
 #include <sys/param.h>
 #include <sys/bus.h>
@@ -55,7 +55,8 @@
        sc->sc_gc.gp_pin_write = plgpio_pin_write;
        sc->sc_gc.gp_pin_ctl = plgpio_pin_ctl;
 
-       const uint32_t cnf = PLGPIO_READ(sc, PL061_GPIOAFSEL_REG);
+       const uint32_t cnf = PLGPIO_READ(sc, PL061_GPIOAFSEL_REG) |
+           sc->sc_reserved_mask;
 
        for (pin = 0; pin < 8; pin++) {
                sc->sc_pins[pin].pin_num = pin;
diff -r dc3aa7776521 -r 43e8b0155805 sys/dev/ic/pl061var.h
--- a/sys/dev/ic/pl061var.h     Sun Oct 21 13:41:15 2018 +0000
+++ b/sys/dev/ic/pl061var.h     Sun Oct 21 18:31:14 2018 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: pl061var.h,v 1.1 2018/10/15 23:50:48 jmcneill Exp $ */
+/* $NetBSD: pl061var.h,v 1.2 2018/10/21 18:31:14 jmcneill Exp $ */
 
 /*
  * Copyright (c) 2018 Jonathan A. Kollasch
@@ -36,6 +36,8 @@
 
        struct gpio_chipset_tag sc_gc;
        gpio_pin_t              sc_pins[8];
+
+       uint32_t                sc_reserved_mask;
 };
 
 void   plgpio_attach(struct plgpio_softc *);