[src/trunk]: src/sys/arch/evbarm/rpi Add machdep.cpu.frequency.available node...

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

details:   https://anonhg.NetBSD.org/src/rev/039742fc454e
branches:  trunk
changeset: 837502:039742fc454e
user:      mlelstv <mlelstv%NetBSD.org@localhost>
date:      Sat Dec 08 06:53:11 2018 +0000

description:
Add machdep.cpu.frequency.available node to support estd.

While the RPI can run at many intermediate clock frequencies,
this is sufficient for estd and is known to work with every
firmware revision.

diffstat:

 sys/arch/evbarm/rpi/rpi_vcmbox.c |  15 +++++++++++++--
 1 files changed, 13 insertions(+), 2 deletions(-)

diffs (43 lines):

diff -r 1632e149254b -r 039742fc454e sys/arch/evbarm/rpi/rpi_vcmbox.c
--- a/sys/arch/evbarm/rpi/rpi_vcmbox.c  Sat Dec 08 01:47:21 2018 +0000
+++ b/sys/arch/evbarm/rpi/rpi_vcmbox.c  Sat Dec 08 06:53:11 2018 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: rpi_vcmbox.c,v 1.4 2014/10/04 13:18:34 mlelstv Exp $ */
+/* $NetBSD: rpi_vcmbox.c,v 1.5 2018/12/08 06:53:11 mlelstv Exp $ */
 
 /*-
  * Copyright (c) 2013 Jared D. McNeill <jmcneill%invisible.ca@localhost>
@@ -31,7 +31,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: rpi_vcmbox.c,v 1.4 2014/10/04 13:18:34 mlelstv Exp $");
+__KERNEL_RCSID(0, "$NetBSD: rpi_vcmbox.c,v 1.5 2018/12/08 06:53:11 mlelstv Exp $");
 
 #include <sys/param.h>
 #include <sys/types.h>
@@ -233,6 +233,7 @@
 {
        const struct sysctlnode *node, *cpunode, *freqnode;
        int error;
+       static char available[20];
 
        error = vcmbox_read_clockrate(sc, VCPROPTAG_GET_MIN_CLOCKRATE,
            VCPROP_CLK_ARM, &sc->sc_cpu_minrate);
@@ -297,6 +298,16 @@
                goto sysctl_failed;
        sc->sc_node_max = node->sysctl_num;
 
+       snprintf(available, sizeof(available), "%" PRIu32 " %" PRIu32,
+           RATE2MHZ(sc->sc_cpu_minrate), RATE2MHZ(sc->sc_cpu_maxrate));
+
+       error = sysctl_createv(&sc->sc_log, 0, &freqnode, &node,
+           CTLFLAG_PERMANENT, CTLTYPE_STRING, "available", NULL,
+           NULL, 0, available, strlen(available),
+           CTL_CREATE, CTL_EOL);
+       if (error)
+               goto sysctl_failed;
+
        return 0;
 
 sysctl_failed: