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authorViresh Kumar <viresh.kumar@linaro.org>2015-02-27 13:39:52 +0530
committerViresh Kumar <viresh.kumar@linaro.org>2015-07-17 08:22:59 +0530
commite2efda24804234c83e17172a2525641dd6b690bc (patch)
tree0095aa4c2a7c5bf791e52e57a3bd162f5cea3ced /arch/arm/mach-gemini
parent947d9cf53f5c9c4dfbbffe68f07dd4d02da2093d (diff)
downloadlinux-e2efda24804234c83e17172a2525641dd6b690bc.tar.bz2
ARM/gemini/time: Migrate to new 'set-state' interface
Migrate gemini 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. Acked-by: Hans Ulli Kroll <ulli.kroll@googlemail.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Diffstat (limited to 'arch/arm/mach-gemini')
-rw-r--r--arch/arm/mach-gemini/time.c69
1 files changed, 34 insertions, 35 deletions
diff --git a/arch/arm/mach-gemini/time.c b/arch/arm/mach-gemini/time.c
index 0a63c4d25b64..b57d367d21f1 100644
--- a/arch/arm/mach-gemini/time.c
+++ b/arch/arm/mach-gemini/time.c
@@ -59,49 +59,48 @@ static int gemini_timer_set_next_event(unsigned long cycles,
return 0;
}
-static void gemini_timer_set_mode(enum clock_event_mode mode,
- struct clock_event_device *evt)
+static int gemini_timer_shutdown(struct clock_event_device *evt)
+{
+ u32 cr;
+
+ /*
+ * Disable also for oneshot: the set_next() call will arm the timer
+ * instead.
+ */
+ cr = readl(TIMER_CR(IO_ADDRESS(GEMINI_TIMER_BASE)));
+ cr &= ~TIMER_2_CR_ENABLE;
+ cr &= ~TIMER_2_CR_INT;
+ writel(cr, TIMER_CR(IO_ADDRESS(GEMINI_TIMER_BASE)));
+ return 0;
+}
+
+static int gemini_timer_set_periodic(struct clock_event_device *evt)
{
u32 period = DIV_ROUND_CLOSEST(tick_rate, HZ);
u32 cr;
- switch (mode) {
- case CLOCK_EVT_MODE_PERIODIC:
- /* Start the timer */
- writel(period,
- TIMER_COUNT(IO_ADDRESS(GEMINI_TIMER2_BASE)));
- writel(period,
- TIMER_LOAD(IO_ADDRESS(GEMINI_TIMER2_BASE)));
- cr = readl(TIMER_CR(IO_ADDRESS(GEMINI_TIMER_BASE)));
- cr |= TIMER_2_CR_ENABLE;
- cr |= TIMER_2_CR_INT;
- writel(cr, TIMER_CR(IO_ADDRESS(GEMINI_TIMER_BASE)));
- break;
- case CLOCK_EVT_MODE_ONESHOT:
- case CLOCK_EVT_MODE_UNUSED:
- case CLOCK_EVT_MODE_SHUTDOWN:
- case CLOCK_EVT_MODE_RESUME:
- /*
- * Disable also for oneshot: the set_next() call will
- * arm the timer instead.
- */
- cr = readl(TIMER_CR(IO_ADDRESS(GEMINI_TIMER_BASE)));
- cr &= ~TIMER_2_CR_ENABLE;
- cr &= ~TIMER_2_CR_INT;
- writel(cr, TIMER_CR(IO_ADDRESS(GEMINI_TIMER_BASE)));
- break;
- default:
- break;
- }
+ /* Start the timer */
+ writel(period, TIMER_COUNT(IO_ADDRESS(GEMINI_TIMER2_BASE)));
+ writel(period, TIMER_LOAD(IO_ADDRESS(GEMINI_TIMER2_BASE)));
+ cr = readl(TIMER_CR(IO_ADDRESS(GEMINI_TIMER_BASE)));
+ cr |= TIMER_2_CR_ENABLE;
+ cr |= TIMER_2_CR_INT;
+ writel(cr, TIMER_CR(IO_ADDRESS(GEMINI_TIMER_BASE)));
+ return 0;
}
/* Use TIMER2 as clock event */
static struct clock_event_device gemini_clockevent = {
- .name = "TIMER2",
- .rating = 300, /* Reasonably fast and accurate clock event */
- .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
- .set_next_event = gemini_timer_set_next_event,
- .set_mode = gemini_timer_set_mode,
+ .name = "TIMER2",
+ /* Reasonably fast and accurate clock event */
+ .rating = 300,
+ .features = CLOCK_EVT_FEAT_PERIODIC |
+ CLOCK_EVT_FEAT_ONESHOT,
+ .set_next_event = gemini_timer_set_next_event,
+ .set_state_shutdown = gemini_timer_shutdown,
+ .set_state_periodic = gemini_timer_set_periodic,
+ .set_state_oneshot = gemini_timer_shutdown,
+ .tick_resume = gemini_timer_shutdown,
};
/*