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clocksource/drivers/moxart: Convert init function to return error

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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>
This commit is contained in:
Daniel Lezcano 2016-06-06 17:57:38 +02:00
parent d8152bf85d
commit b7357e656c
1 changed files with 27 additions and 14 deletions
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41
drivers/clocksource/moxart_timer.c
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@ -119,34 +119,45 @@ static struct irqaction moxart_timer_irq = {
.dev_id = &moxart_clockevent,
};
static void __init moxart_timer_init(struct device_node *node)
static int __init moxart_timer_init(struct device_node *node)
{
int ret, irq;
unsigned long pclk;
struct clk *clk;
base = of_iomap(node, 0);
if (!base)
panic("%s: of_iomap failed\n", node->full_name);
if (!base) {
pr_err("%s: of_iomap failed\n", node->full_name);
return -ENXIO;
}
irq = irq_of_parse_and_map(node, 0);
if (irq <= 0)
panic("%s: irq_of_parse_and_map failed\n", node->full_name);
if (irq <= 0) {
pr_err("%s: irq_of_parse_and_map failed\n", node->full_name);
return -EINVAL;
}
ret = setup_irq(irq, &moxart_timer_irq);
if (ret)
panic("%s: setup_irq failed\n", node->full_name);
if (ret) {
pr_err("%s: setup_irq failed\n", node->full_name);
return ret;
}
clk = of_clk_get(node, 0);
if (IS_ERR(clk))
panic("%s: of_clk_get failed\n", node->full_name);
if (IS_ERR(clk)) {
pr_err("%s: of_clk_get failed\n", node->full_name);
return PTR_ERR(clk);
}
pclk = clk_get_rate(clk);
if (clocksource_mmio_init(base + TIMER2_BASE + REG_COUNT,
"moxart_timer", pclk, 200, 32,
clocksource_mmio_readl_down))
panic("%s: clocksource_mmio_init failed\n", node->full_name);
ret = clocksource_mmio_init(base + TIMER2_BASE + REG_COUNT,
"moxart_timer", pclk, 200, 32,
clocksource_mmio_readl_down);
if (ret) {
pr_err("%s: clocksource_mmio_init failed\n", node->full_name);
return ret;
}
clock_count_per_tick = DIV_ROUND_CLOSEST(pclk, HZ);
@ -164,5 +175,7 @@ static void __init moxart_timer_init(struct device_node *node)
*/
clockevents_config_and_register(&moxart_clockevent, pclk,
0x4, 0xfffffffe);
return 0;
}
CLOCKSOURCE_OF_DECLARE(moxart, "moxa,moxart-timer", moxart_timer_init);
CLOCKSOURCE_OF_DECLARE_RET(moxart, "moxa,moxart-timer", moxart_timer_init);