From mboxrd@z Thu Jan 1 00:00:00 1970 From: Vineet.Gupta1@synopsys.com (Vineet Gupta) Date: Mon, 31 Oct 2016 15:48:08 -0700 Subject: [PATCH 1/9] ARC: timer: gfrc, rtc: Read BCR to detect whether hardware exists ... In-Reply-To: <1477954096-770-1-git-send-email-vgupta@synopsys.com> References: <35bde193-8492-83e0-fb03-8385d8afd007@synopsys.com> <1477954096-770-1-git-send-email-vgupta@synopsys.com> List-ID: Message-ID: <1477954096-770-2-git-send-email-vgupta@synopsys.com> To: linux-snps-arc@lists.infradead.org ... don't rely on cpuinfo populated in arc boot code. This paves wat for moving this code in drivers/clocksource/ Signed-off-by: Vineet Gupta --- arch/arc/kernel/time.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/arch/arc/kernel/time.c b/arch/arc/kernel/time.c index f927b8dc6edd..a2db010cde18 100644 --- a/arch/arc/kernel/time.c +++ b/arch/arc/kernel/time.c @@ -118,10 +118,11 @@ static struct clocksource arc_counter_gfrc = { static int __init arc_cs_setup_gfrc(struct device_node *node) { - int exists = cpuinfo_arc700[0].extn.gfrc; + struct mcip_bcr mp; int ret; - if (WARN(!exists, "Global-64-bit-Ctr clocksource not detected")) + READ_BCR(ARC_REG_MCIP_BCR, mp); + if (WARN(!mp.gfrc, "Global-64-bit-Ctr clocksource not detected")) return -ENXIO; ret = arc_get_timer_clk(node); @@ -174,10 +175,11 @@ static struct clocksource arc_counter_rtc = { static int __init arc_cs_setup_rtc(struct device_node *node) { - int exists = cpuinfo_arc700[smp_processor_id()].extn.rtc; + struct bcr_timer timer; int ret; - if (WARN(!exists, "Local-64-bit-Ctr clocksource not detected")) + READ_BCR(ARC_REG_TIMERS_BCR, timer); + if (WARN(!timer.rtc, "Local-64-bit-Ctr clocksource not detected")) return -ENXIO; /* Local to CPU hence not usable in SMP */ -- 2.7.4