ARM/w90x900/time: Migrate to new 'set-state' interface

Migrate w90x900 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.

Cc: Wan ZongShun <mcuos.com@gmail.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>

diff --git a/arch/arm/mach-w90x900/time.c b/arch/arm/mach-w90x900/time.c
index 9230d3725599c0baeb6bd9e3b46f3b5b29b0bcfe..cd1966ec9143bb850bae972a4d0c6f0990f161a2 100644 (file)
--- a/arch/arm/mach-w90x900/time.c
+++ b/arch/arm/mach-w90x900/time.c
@@ -48,31 +48,32 @@
 
 static unsigned int timer0_load;
 
-static void nuc900_clockevent_setmode(enum clock_event_mode mode,
-               struct clock_event_device *clk)
+static int nuc900_clockevent_shutdown(struct clock_event_device *evt)
 {
-       unsigned int val;
+       unsigned int val = __raw_readl(REG_TCSR0) & ~(0x03 << 27);
 
-       val = __raw_readl(REG_TCSR0);
-       val &= ~(0x03 << 27);
+       __raw_writel(val, REG_TCSR0);
+       return 0;
+}
+
+static int nuc900_clockevent_set_oneshot(struct clock_event_device *evt)
+{
+       unsigned int val = __raw_readl(REG_TCSR0) & ~(0x03 << 27);
 
-       switch (mode) {
-       case CLOCK_EVT_MODE_PERIODIC:
-               __raw_writel(timer0_load, REG_TICR0);
-               val |= (PERIOD | COUNTEN | INTEN | PRESCALE);
-               break;
+       val |= (ONESHOT | COUNTEN | INTEN | PRESCALE);
 
-       case CLOCK_EVT_MODE_ONESHOT:
-               val |= (ONESHOT | COUNTEN | INTEN | PRESCALE);
-               break;
+       __raw_writel(val, REG_TCSR0);
+       return 0;
+}
 
-       case CLOCK_EVT_MODE_UNUSED:
-       case CLOCK_EVT_MODE_SHUTDOWN:
-       case CLOCK_EVT_MODE_RESUME:
-               break;
-       }
+static int nuc900_clockevent_set_periodic(struct clock_event_device *evt)
+{
+       unsigned int val = __raw_readl(REG_TCSR0) & ~(0x03 << 27);
 
+       __raw_writel(timer0_load, REG_TICR0);
+       val |= (PERIOD | COUNTEN | INTEN | PRESCALE);
        __raw_writel(val, REG_TCSR0);
+       return 0;
 }
 
 static int nuc900_clockevent_setnextevent(unsigned long evt,
@@ -90,11 +91,15 @@ static int nuc900_clockevent_setnextevent(unsigned long evt,
 }
 
 static struct clock_event_device nuc900_clockevent_device = {
-       .name           = "nuc900-timer0",
-       .features       = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
-       .set_mode       = nuc900_clockevent_setmode,
-       .set_next_event = nuc900_clockevent_setnextevent,
-       .rating         = 300,
+       .name                   = "nuc900-timer0",
+       .features               = CLOCK_EVT_FEAT_PERIODIC |
+                                 CLOCK_EVT_FEAT_ONESHOT,
+       .set_state_shutdown     = nuc900_clockevent_shutdown,
+       .set_state_periodic     = nuc900_clockevent_set_periodic,
+       .set_state_oneshot      = nuc900_clockevent_set_oneshot,
+       .tick_resume            = nuc900_clockevent_shutdown,
+       .set_next_event         = nuc900_clockevent_setnextevent,
+       .rating                 = 300,
 };
 
 /*IRQ handler for the timer*/