redonkable/alistair23-linux
redonkable/alistair23-linux
1
0
Fork 0
Code Releases Activity

ARM/ixp4xx/timer: Migrate to new 'set-state' interface

Browse source 
Migrate ixp4xx driver to the new 'set-state' interface provided by
clockevents core, the earlier 'set-mode' interface is marked obsolete
now.

This also enables us to implement callbacks for new states of clockevent
devices, for example: ONESHOT_STOPPED.

NOTE: ixp4xx_set_{oneshot|periodic} don't perform read operation on
'IXP4XX_OSRT1' register anymore.

Cc: Imre Kaloz <kaloz@openwrt.org>
Acked-by: Krzysztof Hałasa <khalasa@piap.pl>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
This commit is contained in:
Viresh Kumar 2015-02-27 13:39:52 +05:30
parent 3200579faf
commit cea50eeef1
1 changed files with 40 additions and 28 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

68
arch/arm/mach-ixp4xx/common.c
View file

@ -521,43 +521,55 @@ static int ixp4xx_set_next_event(unsigned long evt,
return 0; return 0;
} }
static void ixp4xx_set_mode(enum clock_event_mode mode, static int ixp4xx_shutdown(struct clock_event_device *evt)
struct clock_event_device *evt)
{ {
unsigned long opts = *IXP4XX_OSRT1 & IXP4XX_OST_RELOAD_MASK; unsigned long opts = *IXP4XX_OSRT1 & IXP4XX_OST_RELOAD_MASK;
unsigned long osrt = *IXP4XX_OSRT1 & ~IXP4XX_OST_RELOAD_MASK; unsigned long osrt = *IXP4XX_OSRT1 & ~IXP4XX_OST_RELOAD_MASK;
switch (mode) { opts &= ~IXP4XX_OST_ENABLE;
case CLOCK_EVT_MODE_PERIODIC: *IXP4XX_OSRT1 = osrt | opts;
osrt = IXP4XX_LATCH & ~IXP4XX_OST_RELOAD_MASK; return 0;
opts = IXP4XX_OST_ENABLE; }
break;
case CLOCK_EVT_MODE_ONESHOT: static int ixp4xx_set_oneshot(struct clock_event_device *evt)
/* period set by 'set next_event' */ {
osrt = 0; unsigned long opts = IXP4XX_OST_ENABLE | IXP4XX_OST_ONE_SHOT;
opts = IXP4XX_OST_ENABLE | IXP4XX_OST_ONE_SHOT; unsigned long osrt = 0;
break;
case CLOCK_EVT_MODE_SHUTDOWN: /* period set by 'set next_event' */
opts &= ~IXP4XX_OST_ENABLE; *IXP4XX_OSRT1 = osrt | opts;
break; return 0;
case CLOCK_EVT_MODE_RESUME: }
opts |= IXP4XX_OST_ENABLE;
break; static int ixp4xx_set_periodic(struct clock_event_device *evt)
case CLOCK_EVT_MODE_UNUSED: {
default: unsigned long opts = IXP4XX_OST_ENABLE;
osrt = opts = 0; unsigned long osrt = IXP4XX_LATCH & ~IXP4XX_OST_RELOAD_MASK;
break;
}
*IXP4XX_OSRT1 = osrt | opts; *IXP4XX_OSRT1 = osrt | opts;
return 0;
}
static int ixp4xx_resume(struct clock_event_device *evt)
{
unsigned long opts = *IXP4XX_OSRT1 & IXP4XX_OST_RELOAD_MASK;
unsigned long osrt = *IXP4XX_OSRT1 & ~IXP4XX_OST_RELOAD_MASK;
opts |= IXP4XX_OST_ENABLE;
*IXP4XX_OSRT1 = osrt | opts;
return 0;
} }
static struct clock_event_device clockevent_ixp4xx = { static struct clock_event_device clockevent_ixp4xx = {
.name = "ixp4xx timer1", .name = "ixp4xx timer1",
.features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT, .features = CLOCK_EVT_FEAT_PERIODIC |
.rating = 200, CLOCK_EVT_FEAT_ONESHOT,
.set_mode = ixp4xx_set_mode, .rating = 200,
.set_next_event = ixp4xx_set_next_event, .set_state_shutdown = ixp4xx_shutdown,
.set_state_periodic = ixp4xx_set_periodic,
.set_state_oneshot = ixp4xx_set_oneshot,
.tick_resume = ixp4xx_resume,
.set_next_event = ixp4xx_set_next_event,
}; };
static void __init ixp4xx_clockevent_init(void) static void __init ixp4xx_clockevent_init(void)