ARM: mxc: Add dummy_get_cycles to avoid access before init is done
this is needed to use get_cycles with sched_clock. Accessing timer without enabled clk will result in crash Signed-off-by: Jan Weitzel <j.weitzel@phytec.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
parent
350ac9ddce
commit
93b20e4fdb
|
@ -105,6 +105,11 @@ static void gpt_irq_acknowledge(void)
|
|||
__raw_writel(V2_TSTAT_OF1, timer_base + V2_TSTAT);
|
||||
}
|
||||
|
||||
static cycle_t dummy_get_cycles(struct clocksource *cs)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static cycle_t mx1_2_get_cycles(struct clocksource *cs)
|
||||
{
|
||||
return __raw_readl(timer_base + MX1_2_TCN);
|
||||
|
@ -118,7 +123,7 @@ static cycle_t v2_get_cycles(struct clocksource *cs)
|
|||
static struct clocksource clocksource_mxc = {
|
||||
.name = "mxc_timer1",
|
||||
.rating = 200,
|
||||
.read = mx1_2_get_cycles,
|
||||
.read = dummy_get_cycles,
|
||||
.mask = CLOCKSOURCE_MASK(32),
|
||||
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
|
||||
};
|
||||
|
@ -129,6 +134,8 @@ static int __init mxc_clocksource_init(struct clk *timer_clk)
|
|||
|
||||
if (timer_is_v2())
|
||||
clocksource_mxc.read = v2_get_cycles;
|
||||
else
|
||||
clocksource_mxc.read = mx1_2_get_cycles;
|
||||
|
||||
clocksource_register_hz(&clocksource_mxc, c);
|
||||
|
||||
|
|
Loading…
Reference in a new issue