lkml.org 
[lkml]   [2016]   [Nov]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v2 03/10] ARC: timer: gfrc, rtc: Read BCR to detect whether hardware exists ...
Date
... 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>
---
arch/arc/kernel/time.c | 18 +++++++++++++-----
1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/arch/arc/kernel/time.c b/arch/arc/kernel/time.c
index 71bcdc1f9bd0..d2335ca49c80 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)
--
2.7.4
\
 
 \ /
  Last update: 2016-11-03 22:33    [W:0.108 / U:0.472 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site