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authorDaniel Lezcano <daniel.lezcano@linaro.org>2016-06-06 18:00:38 +0200
committerDaniel Lezcano <daniel.lezcano@linaro.org>2016-06-28 10:19:28 +0200
commitfbe4b3566ddcde4b0708330651cbd982e555f4eb (patch)
tree6e950b4fa9165952dc355a3f47e52fa08669c50b
parent4e2afeb9e653d4201039f06c02a37312bc38c3b8 (diff)
downloadlinux-fbe4b3566ddcde4b0708330651cbd982e555f4eb.tar.gz
clocksource/drivers/orion: Convert init function to return error
The init functions do not return any error. They behave as the following: - panic, thus leading to a kernel crash while another timer may work and make the system boot up correctly or - print an error and let the caller unaware if the state of the system Change that by converting the init functions to return an error conforming to the CLOCKSOURCE_OF_RET prototype. Proper error handling (rollback, errno value) will be changed later case by case, thus this change just return back an error or success in the init function. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
-rw-r--r--drivers/clocksource/time-orion.c52
1 files changed, 37 insertions, 15 deletions
diff --git a/drivers/clocksource/time-orion.c b/drivers/clocksource/time-orion.c
index 0ece7427b497..5fdeb5dcc4cf 100644
--- a/drivers/clocksource/time-orion.c
+++ b/drivers/clocksource/time-orion.c
@@ -104,25 +104,36 @@ static struct irqaction orion_clkevt_irq = {
.handler = orion_clkevt_irq_handler,
};
-static void __init orion_timer_init(struct device_node *np)
+static int __init orion_timer_init(struct device_node *np)
{
struct clk *clk;
- int irq;
+ int irq, ret;
/* timer registers are shared with watchdog timer */
timer_base = of_iomap(np, 0);
- if (!timer_base)
- panic("%s: unable to map resource\n", np->name);
+ if (!timer_base) {
+ pr_err("%s: unable to map resource\n", np->name);
+ return -ENXIO;
+ }
clk = of_clk_get(np, 0);
- if (IS_ERR(clk))
- panic("%s: unable to get clk\n", np->name);
- clk_prepare_enable(clk);
+ if (IS_ERR(clk)) {
+ pr_err("%s: unable to get clk\n", np->name);
+ return PTR_ERR(clk);
+ }
+
+ ret = clk_prepare_enable(clk);
+ if (ret) {
+ pr_err("Failed to prepare clock");
+ return ret;
+ }
/* we are only interested in timer1 irq */
irq = irq_of_parse_and_map(np, 1);
- if (irq <= 0)
- panic("%s: unable to parse timer1 irq\n", np->name);
+ if (irq <= 0) {
+ pr_err("%s: unable to parse timer1 irq\n", np->name);
+ return -EINVAL;
+ }
/* setup timer0 as free-running clocksource */
writel(~0, timer_base + TIMER0_VAL);
@@ -130,19 +141,30 @@ static void __init orion_timer_init(struct device_node *np)
atomic_io_modify(timer_base + TIMER_CTRL,
TIMER0_RELOAD_EN | TIMER0_EN,
TIMER0_RELOAD_EN | TIMER0_EN);
- clocksource_mmio_init(timer_base + TIMER0_VAL, "orion_clocksource",
- clk_get_rate(clk), 300, 32,
- clocksource_mmio_readl_down);
+
+ ret = clocksource_mmio_init(timer_base + TIMER0_VAL, "orion_clocksource",
+ clk_get_rate(clk), 300, 32,
+ clocksource_mmio_readl_down);
+ if (ret) {
+ pr_err("Failed to initialize mmio timer");
+ return ret;
+ }
+
sched_clock_register(orion_read_sched_clock, 32, clk_get_rate(clk));
/* setup timer1 as clockevent timer */
- if (setup_irq(irq, &orion_clkevt_irq))
- panic("%s: unable to setup irq\n", np->name);
+ ret = setup_irq(irq, &orion_clkevt_irq);
+ if (ret) {
+ pr_err("%s: unable to setup irq\n", np->name);
+ return ret;
+ }
ticks_per_jiffy = (clk_get_rate(clk) + HZ/2) / HZ;
orion_clkevt.cpumask = cpumask_of(0);
orion_clkevt.irq = irq;
clockevents_config_and_register(&orion_clkevt, clk_get_rate(clk),
ORION_ONESHOT_MIN, ORION_ONESHOT_MAX);
+
+ return 0;
}
-CLOCKSOURCE_OF_DECLARE(orion_timer, "marvell,orion-timer", orion_timer_init);
+CLOCKSOURCE_OF_DECLARE_RET(orion_timer, "marvell,orion-timer", orion_timer_init);