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authorThomas Gleixner <tglx@linutronix.de>2016-07-07 15:41:13 +0200
committerThomas Gleixner <tglx@linutronix.de>2016-07-07 15:41:13 +0200
commit3d93f42d449ace8e2dd8e2ec9790fdce31a14c9c (patch)
tree16abfc89c51a2cf0116eb692a591faf897e04297 /arch/nios2
parentMerge branch 'timers/fast-wheel' into timers/core (diff)
parentclocksource/drivers/cadence_ttc: fix a return value in case of error (diff)
downloadlinux-3d93f42d449ace8e2dd8e2ec9790fdce31a14c9c.tar.xz
linux-3d93f42d449ace8e2dd8e2ec9790fdce31a14c9c.zip
Merge branch 'clockevents/4.8' of http://git.linaro.org/people/daniel.lezcano/linux into timers/core
Pull the clockevents/clocksource tree from Daniel Lezcano: - Convert the clocksource-probe init functions to return a value in order to prepare the consolidation of the drivers using the DT. It is a big patchset but went through 01.org (kbuild bot), linux next and kernel-ci (continuous integration) (Daniel Lezcano) - Fix a bad error handling by returning the right value for cadence_ttc (Christophe Jaillet) - Fix typo in the Kconfig for the Samsung pwm (Alexandre Belloni) - Change functions to static for armada-370-xp and digicolor (Ben Dooks) - Add support for the rk3399 SoC timer by adding bindings and a slight change in the base address. Take the opportunity to add the DYNIRQ flag (Huang Tao) - Fix endian accessors for the Samsung pwm timer (Matthew Leach) - Add Oxford Semiconductor RPS Dual Timer driver (Neil Armstrong) - Add a kernel parameter to swich on/off the event stream feature of the arch arm timer (Will Deacon)
Diffstat (limited to 'arch/nios2')
-rw-r--r--arch/nios2/kernel/time.c63
1 files changed, 44 insertions, 19 deletions
diff --git a/arch/nios2/kernel/time.c b/arch/nios2/kernel/time.c
index e835dda2bfe2..d9563ddb337e 100644
--- a/arch/nios2/kernel/time.c
+++ b/arch/nios2/kernel/time.c
@@ -206,15 +206,21 @@ irqreturn_t timer_interrupt(int irq, void *dev_id)
return IRQ_HANDLED;
}
-static void __init nios2_timer_get_base_and_freq(struct device_node *np,
+static int __init nios2_timer_get_base_and_freq(struct device_node *np,
void __iomem **base, u32 *freq)
{
*base = of_iomap(np, 0);
- if (!*base)
- panic("Unable to map reg for %s\n", np->name);
+ if (!*base) {
+ pr_crit("Unable to map reg for %s\n", np->name);
+ return -ENXIO;
+ }
+
+ if (of_property_read_u32(np, "clock-frequency", freq)) {
+ pr_crit("Unable to get %s clock frequency\n", np->name);
+ return -EINVAL;
+ }
- if (of_property_read_u32(np, "clock-frequency", freq))
- panic("Unable to get %s clock frequency\n", np->name);
+ return 0;
}
static struct nios2_clockevent_dev nios2_ce = {
@@ -231,17 +237,21 @@ static struct nios2_clockevent_dev nios2_ce = {
},
};
-static __init void nios2_clockevent_init(struct device_node *timer)
+static __init int nios2_clockevent_init(struct device_node *timer)
{
void __iomem *iobase;
u32 freq;
- int irq;
+ int irq, ret;
- nios2_timer_get_base_and_freq(timer, &iobase, &freq);
+ ret = nios2_timer_get_base_and_freq(timer, &iobase, &freq);
+ if (ret)
+ return ret;
irq = irq_of_parse_and_map(timer, 0);
- if (!irq)
- panic("Unable to parse timer irq\n");
+ if (!irq) {
+ pr_crit("Unable to parse timer irq\n");
+ return -EINVAL;
+ }
nios2_ce.timer.base = iobase;
nios2_ce.timer.freq = freq;
@@ -253,25 +263,35 @@ static __init void nios2_clockevent_init(struct device_node *timer)
/* clear pending interrupt */
timer_writew(&nios2_ce.timer, 0, ALTERA_TIMER_STATUS_REG);
- if (request_irq(irq, timer_interrupt, IRQF_TIMER, timer->name,
- &nios2_ce.ced))
- panic("Unable to setup timer irq\n");
+ ret = request_irq(irq, timer_interrupt, IRQF_TIMER, timer->name,
+ &nios2_ce.ced);
+ if (ret) {
+ pr_crit("Unable to setup timer irq\n");
+ return ret;
+ }
clockevents_config_and_register(&nios2_ce.ced, freq, 1, ULONG_MAX);
+
+ return 0;
}
-static __init void nios2_clocksource_init(struct device_node *timer)
+static __init int nios2_clocksource_init(struct device_node *timer)
{
unsigned int ctrl;
void __iomem *iobase;
u32 freq;
+ int ret;
- nios2_timer_get_base_and_freq(timer, &iobase, &freq);
+ ret = nios2_timer_get_base_and_freq(timer, &iobase, &freq);
+ if (ret)
+ return ret;
nios2_cs.timer.base = iobase;
nios2_cs.timer.freq = freq;
- clocksource_register_hz(&nios2_cs.cs, freq);
+ ret = clocksource_register_hz(&nios2_cs.cs, freq);
+ if (ret)
+ return ret;
timer_writew(&nios2_cs.timer, USHRT_MAX, ALTERA_TIMER_PERIODL_REG);
timer_writew(&nios2_cs.timer, USHRT_MAX, ALTERA_TIMER_PERIODH_REG);
@@ -282,6 +302,8 @@ static __init void nios2_clocksource_init(struct device_node *timer)
/* Calibrate the delay loop directly */
lpj_fine = freq / HZ;
+
+ return 0;
}
/*
@@ -289,22 +311,25 @@ static __init void nios2_clocksource_init(struct device_node *timer)
* more instances, the second one gets used as clocksource and all
* others are unused.
*/
-static void __init nios2_time_init(struct device_node *timer)
+static int __init nios2_time_init(struct device_node *timer)
{
static int num_called;
+ int ret;
switch (num_called) {
case 0:
- nios2_clockevent_init(timer);
+ ret = nios2_clockevent_init(timer);
break;
case 1:
- nios2_clocksource_init(timer);
+ ret = nios2_clocksource_init(timer);
break;
default:
break;
}
num_called++;
+
+ return ret;
}
void read_persistent_clock(struct timespec *ts)