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| author | Vineet Gupta <vgupta@synopsys.com> | 2016-10-31 21:02:31 +0100 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2016-11-30 20:54:25 +0100 |
| commit | ec7cb87bf998448471d1ff735abf156211da0874 (patch) | |
| tree | 97b6d6960fb5b008a71bfd5a2f4cd46d75e9bf3e /arch/arc | |
| parent | ARC: timer: gfrc, rtc: deuglify big endian code (diff) | |
| download | linux-ec7cb87bf998448471d1ff735abf156211da0874.tar.xz linux-ec7cb87bf998448471d1ff735abf156211da0874.zip | |
ARC: timer: gfrc, rtc: Read BCR to detect whether hardware exists ...
... don't rely on cpuinfo populated in arc boot code. This paves way for
moving this code in drivers/clocksource/
And while at it, convert the WARN() to pr_warn() as sugested by Daniel
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc')
| -rw-r--r-- | arch/arc/kernel/time.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/arch/arc/kernel/time.c b/arch/arc/kernel/time.c index 8d66bb446209..d3f3750a0d2d 100644 --- a/arch/arc/kernel/time.c +++ b/arch/arc/kernel/time.c @@ -111,11 +111,14 @@ 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 (!mp.gfrc) { + pr_warn("Global-64-bit-Ctr clocksource not detected"); return -ENXIO; + } ret = arc_get_timer_clk(node); if (ret) @@ -163,15 +166,20 @@ 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 (!timer.rtc) { + pr_warn("Local-64-bit-Ctr clocksource not detected"); return -ENXIO; + } /* Local to CPU hence not usable in SMP */ - if (WARN(IS_ENABLED(CONFIG_SMP), "Local-64-bit-Ctr not usable in SMP")) + if (IS_ENABLED(CONFIG_SMP)) { + pr_warn("Local-64-bit-Ctr not usable in SMP"); return -EINVAL; + } ret = arc_get_timer_clk(node); if (ret) |