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MIPS: cevt-txx9: Migrate to new 'set-state' interface 

Migrate cevt-txx9 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.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Deng-Cheng Zhu <dengcheng.zhu@imgtec.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: linux-mips@linux-mips.org
Cc: linaro-kernel@lists.linaro.org
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Patchwork: https://patchwork.linux-mips.org/patch/10607/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Viresh Kumar 2015-07-06 16:42:00 +05:30 committed by Ralf Baechle
parent 57e148cabb
commit d199da550d
1 changed files with 51 additions and 30 deletions
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81
arch/mips/kernel/cevt-txx9.c
View File

@ -85,36 +85,54 @@ static void txx9tmr_stop_and_clear(struct txx9_tmr_reg __iomem *tmrptr)
__raw_writel(0, &tmrptr->tisr);
}
static void txx9tmr_set_mode(enum clock_event_mode mode,
struct clock_event_device *evt)
static int txx9tmr_set_state_periodic(struct clock_event_device *evt)
{
struct txx9_clock_event_device *txx9_cd =
container_of(evt, struct txx9_clock_event_device, cd);
struct txx9_tmr_reg __iomem *tmrptr = txx9_cd->tmrptr;
txx9tmr_stop_and_clear(tmrptr);
switch (mode) {
case CLOCK_EVT_MODE_PERIODIC:
__raw_writel(TXx9_TMITMR_TIIE | TXx9_TMITMR_TZCE,
&tmrptr->itmr);
/* start timer */
__raw_writel(((u64)(NSEC_PER_SEC / HZ) * evt->mult) >>
evt->shift,
&tmrptr->cpra);
__raw_writel(TCR_BASE | TXx9_TMTCR_TCE, &tmrptr->tcr);
break;
case CLOCK_EVT_MODE_SHUTDOWN:
case CLOCK_EVT_MODE_UNUSED:
__raw_writel(0, &tmrptr->itmr);
break;
case CLOCK_EVT_MODE_ONESHOT:
__raw_writel(TXx9_TMITMR_TIIE, &tmrptr->itmr);
break;
case CLOCK_EVT_MODE_RESUME:
__raw_writel(TIMER_CCD, &tmrptr->ccdr);
__raw_writel(0, &tmrptr->itmr);
break;
}
__raw_writel(TXx9_TMITMR_TIIE | TXx9_TMITMR_TZCE, &tmrptr->itmr);
/* start timer */
__raw_writel(((u64)(NSEC_PER_SEC / HZ) * evt->mult) >> evt->shift,
&tmrptr->cpra);
__raw_writel(TCR_BASE | TXx9_TMTCR_TCE, &tmrptr->tcr);
return 0;
}
static int txx9tmr_set_state_oneshot(struct clock_event_device *evt)
{
struct txx9_clock_event_device *txx9_cd =
container_of(evt, struct txx9_clock_event_device, cd);
struct txx9_tmr_reg __iomem *tmrptr = txx9_cd->tmrptr;
txx9tmr_stop_and_clear(tmrptr);
__raw_writel(TXx9_TMITMR_TIIE, &tmrptr->itmr);
return 0;
}
static int txx9tmr_set_state_shutdown(struct clock_event_device *evt)
{
struct txx9_clock_event_device *txx9_cd =
container_of(evt, struct txx9_clock_event_device, cd);
struct txx9_tmr_reg __iomem *tmrptr = txx9_cd->tmrptr;
txx9tmr_stop_and_clear(tmrptr);
__raw_writel(0, &tmrptr->itmr);
return 0;
}
static int txx9tmr_tick_resume(struct clock_event_device *evt)
{
struct txx9_clock_event_device *txx9_cd =
container_of(evt, struct txx9_clock_event_device, cd);
struct txx9_tmr_reg __iomem *tmrptr = txx9_cd->tmrptr;
txx9tmr_stop_and_clear(tmrptr);
__raw_writel(TIMER_CCD, &tmrptr->ccdr);
__raw_writel(0, &tmrptr->itmr);
return 0;
}
static int txx9tmr_set_next_event(unsigned long delta,
@ -133,12 +151,15 @@ static int txx9tmr_set_next_event(unsigned long delta,
static struct txx9_clock_event_device txx9_clock_event_device = {
.cd = {
.name = "TXx9",
.features = CLOCK_EVT_FEAT_PERIODIC |
CLOCK_EVT_FEAT_ONESHOT,
.rating = 200,
.set_mode = txx9tmr_set_mode,
.set_next_event = txx9tmr_set_next_event,
.name = "TXx9",
.features = CLOCK_EVT_FEAT_PERIODIC |
CLOCK_EVT_FEAT_ONESHOT,
.rating = 200,
.set_state_shutdown = txx9tmr_set_state_shutdown,
.set_state_periodic = txx9tmr_set_state_periodic,
.set_state_oneshot = txx9tmr_set_state_oneshot,
.tick_resume = txx9tmr_tick_resume,
.set_next_event = txx9tmr_set_next_event,
},
};