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clocksource: dw_apb_timer_of: use clocksource_of_init

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dw_apb_timer_init used to search the devicetree for matching timer
devices, making calls to it from board files necessary.

Change the dw_apb_timer_init to work with CLOCKSOURCE_OF_DECLARE.
With this change the function gets called once for each timer node
and tracks these number of calls to attach clockevent and clocksource
devices to the nodes.

Also remove the calls to dw_apb_timer_init from all previous users, as
clocksource_of_init is the default for init_time now.

Tested on the upcoming rk3066 code.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Rob Herring <rob.herring@calxeda.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Jamie Iles <jamie@jamieiles.com>
Acked-by: Dinh Nguyen <dinguyen@altera.com>
This commit is contained in:
Heiko Stuebner
2013-06-04 11:38:42 +02:00
parent 1b4eca0f63
commit 1002148899
5 changed files with 21 additions and 26 deletions
Download Patch File Download Diff File Expand all files Collapse all files

41
drivers/clocksource/dw_apb_timer_of.c
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@@ -133,27 +133,26 @@ static void init_sched_clock(void)
setup_sched_clock(read_sched_clock, 32, sched_rate);
}
static const struct of_device_id osctimer_ids[] __initconst = {
{ .compatible = "picochip,pc3x2-timer" },
{ .compatible = "snps,dw-apb-timer-osc" },
{},
};
void __init dw_apb_timer_init(void)
static int num_called;
static void __init dw_apb_timer_init(struct device_node *timer)
{
struct device_node *event_timer, *source_timer;
switch (num_called) {
case 0:
pr_debug("%s: found clockevent timer\n", __func__);
add_clockevent(timer);
of_node_put(timer);
break;
case 1:
pr_debug("%s: found clocksource timer\n", __func__);
add_clocksource(timer);
of_node_put(timer);
init_sched_clock();
break;
default:
break;
}
event_timer = of_find_matching_node(NULL, osctimer_ids);
if (!event_timer)
panic("No timer for clockevent");
add_clockevent(event_timer);
source_timer = of_find_matching_node(event_timer, osctimer_ids);
if (!source_timer)
panic("No timer for clocksource");
add_clocksource(source_timer);
of_node_put(source_timer);
init_sched_clock();
num_called++;
}
CLOCKSOURCE_OF_DECLARE(pc3x2_timer, "picochip,pc3x2-timer", dw_apb_timer_init);
CLOCKSOURCE_OF_DECLARE(apb_timer, "snps,dw-apb-timer-osc", dw_apb_timer_init);