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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/microblaze
parent4b4b20852d1009c5e8bc357b22353b62e3a241c7 (diff)
parent34c720a915857f168b98ab03f97b33784286e4ad (diff)
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/microblaze')
-rw-r--r--arch/microblaze/kernel/timer.c49
1 files changed, 37 insertions, 12 deletions
diff --git a/arch/microblaze/kernel/timer.c b/arch/microblaze/kernel/timer.c
index 67e2ef48d2d0..5bbf38b916ef 100644
--- a/arch/microblaze/kernel/timer.c
+++ b/arch/microblaze/kernel/timer.c
@@ -170,7 +170,7 @@ static struct irqaction timer_irqaction = {
.dev_id = &clockevent_xilinx_timer,
};
-static __init void xilinx_clockevent_init(void)
+static __init int xilinx_clockevent_init(void)
{
clockevent_xilinx_timer.mult =
div_sc(timer_clock_freq, NSEC_PER_SEC,
@@ -181,6 +181,8 @@ static __init void xilinx_clockevent_init(void)
clockevent_delta2ns(1, &clockevent_xilinx_timer);
clockevent_xilinx_timer.cpumask = cpumask_of(0);
clockevents_register_device(&clockevent_xilinx_timer);
+
+ return 0;
}
static u64 xilinx_clock_read(void)
@@ -229,8 +231,14 @@ static struct clocksource clocksource_microblaze = {
static int __init xilinx_clocksource_init(void)
{
- if (clocksource_register_hz(&clocksource_microblaze, timer_clock_freq))
- panic("failed to register clocksource");
+ int ret;
+
+ ret = clocksource_register_hz(&clocksource_microblaze,
+ timer_clock_freq);
+ if (ret) {
+ pr_err("failed to register clocksource");
+ return ret;
+ }
/* stop timer1 */
write_fn(read_fn(timer_baseaddr + TCSR1) & ~TCSR_ENT,
@@ -239,16 +247,16 @@ static int __init xilinx_clocksource_init(void)
write_fn(TCSR_TINT|TCSR_ENT|TCSR_ARHT, timer_baseaddr + TCSR1);
/* register timecounter - for ftrace support */
- init_xilinx_timecounter();
- return 0;
+ return init_xilinx_timecounter();
}
-static void __init xilinx_timer_init(struct device_node *timer)
+static int __init xilinx_timer_init(struct device_node *timer)
{
struct clk *clk;
static int initialized;
u32 irq;
u32 timer_num = 1;
+ int ret;
if (initialized)
return;
@@ -258,7 +266,7 @@ static void __init xilinx_timer_init(struct device_node *timer)
timer_baseaddr = of_iomap(timer, 0);
if (!timer_baseaddr) {
pr_err("ERROR: invalid timer base address\n");
- BUG();
+ return -ENXIO;
}
write_fn = timer_write32;
@@ -271,11 +279,15 @@ static void __init xilinx_timer_init(struct device_node *timer)
}
irq = irq_of_parse_and_map(timer, 0);
+ if (irq <= 0) {
+ pr_err("Failed to parse and map irq");
+ return -EINVAL;
+ }
of_property_read_u32(timer, "xlnx,one-timer-only", &timer_num);
if (timer_num) {
- pr_emerg("Please enable two timers in HW\n");
- BUG();
+ pr_err("Please enable two timers in HW\n");
+ return -EINVAL;
}
pr_info("%s: irq=%d\n", timer->full_name, irq);
@@ -297,14 +309,27 @@ static void __init xilinx_timer_init(struct device_node *timer)
freq_div_hz = timer_clock_freq / HZ;
- setup_irq(irq, &timer_irqaction);
+ ret = setup_irq(irq, &timer_irqaction);
+ if (ret) {
+ pr_err("Failed to setup IRQ");
+ return ret;
+ }
+
#ifdef CONFIG_HEART_BEAT
microblaze_setup_heartbeat();
#endif
- xilinx_clocksource_init();
- xilinx_clockevent_init();
+
+ ret = xilinx_clocksource_init();
+ if (ret)
+ return ret;
+
+ ret = xilinx_clockevent_init();
+ if (ret)
+ return ret;
sched_clock_register(xilinx_clock_read, 32, timer_clock_freq);
+
+ return 0;
}
CLOCKSOURCE_OF_DECLARE(xilinx_timer, "xlnx,xps-timer-1.00.a",