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If the "frequency" property is not specified, try to use the value in 

CNTFRQ. Firmware should have already set this for us.
This commit is contained in:
jmcneill 2017-05-28 00:29:55 +00:00
parent 7780d9ea44
commit 439bf4cce8
1 changed files with 5 additions and 3 deletions
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8
sys/arch/arm/cortex/gtmr.c
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@ -1,4 +1,4 @@
/* $NetBSD: gtmr.c,v 1.16 2015/04/20 20:19:52 matt Exp $ */
/* $NetBSD: gtmr.c,v 1.17 2017/05/28 00:29:55 jmcneill Exp $ */
/*-
* Copyright (c) 2012 The NetBSD Foundation, Inc.
@ -30,7 +30,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: gtmr.c,v 1.16 2015/04/20 20:19:52 matt Exp $");
__KERNEL_RCSID(0, "$NetBSD: gtmr.c,v 1.17 2017/05/28 00:29:55 jmcneill Exp $");
#include <sys/param.h>
#include <sys/bus.h>
@ -103,7 +103,9 @@ gtmr_attach(device_t parent, device_t self, void *aux)
/*
* This runs at a fixed frequency of 1 to 50MHz.
*/
prop_dictionary_get_uint32(dict, "frequency", &sc->sc_freq);
if (!prop_dictionary_get_uint32(dict, "frequency", &sc->sc_freq))
sc->sc_freq = armreg_cnt_frq_read();
KASSERT(sc->sc_freq != 0);
humanize_number(freqbuf, sizeof(freqbuf), sc->sc_freq, "Hz", 1000);