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

The init function does not return any error, it prints a message, returns and
lets 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 17:58:03 +02:00
parent 0cc7afc6e0
commit e1d2b9f024
1 changed files with 18 additions and 8 deletions
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26
drivers/clocksource/mxs_timer.c
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@ -226,10 +226,10 @@ static int __init mxs_clocksource_init(struct clk *timer_clk)
return 0; return 0;
} }
static void __init mxs_timer_init(struct device_node *np) static int __init mxs_timer_init(struct device_node *np)
{ {
struct clk *timer_clk; struct clk *timer_clk;
int irq; int irq, ret;
mxs_timrot_base = of_iomap(np, 0); mxs_timrot_base = of_iomap(np, 0);
WARN_ON(!mxs_timrot_base); WARN_ON(!mxs_timrot_base);
@ -237,10 +237,12 @@ static void __init mxs_timer_init(struct device_node *np)
timer_clk = of_clk_get(np, 0); timer_clk = of_clk_get(np, 0);
if (IS_ERR(timer_clk)) { if (IS_ERR(timer_clk)) {
pr_err("%s: failed to get clk\n", __func__); pr_err("%s: failed to get clk\n", __func__);
return; return PTR_ERR(timer_clk);
} }
clk_prepare_enable(timer_clk); ret = clk_prepare_enable(timer_clk);
if (ret)
return ret;
/* /*
* Initialize timers to a known state * Initialize timers to a known state
@ -278,11 +280,19 @@ static void __init mxs_timer_init(struct device_node *np)
mxs_timrot_base + HW_TIMROT_FIXED_COUNTn(1)); mxs_timrot_base + HW_TIMROT_FIXED_COUNTn(1));
/* init and register the timer to the framework */ /* init and register the timer to the framework */
mxs_clocksource_init(timer_clk); ret = mxs_clocksource_init(timer_clk);
mxs_clockevent_init(timer_clk); if (ret)
return ret;
ret = mxs_clockevent_init(timer_clk);
if (ret)
return ret;
/* Make irqs happen */ /* Make irqs happen */
irq = irq_of_parse_and_map(np, 0); irq = irq_of_parse_and_map(np, 0);
setup_irq(irq, &mxs_timer_irq); if (irq <= 0)
return -EINVAL;
return setup_irq(irq, &mxs_timer_irq);
} }
CLOCKSOURCE_OF_DECLARE(mxs, "fsl,timrot", mxs_timer_init); CLOCKSOURCE_OF_DECLARE_RET(mxs, "fsl,timrot", mxs_timer_init);