ARM/lpc32xx/timer: Migrate to new 'set-state' interface

Migrate lpc32xx 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: Roland Stigge <stigge@antcom.de>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>

1 files changed, 14 insertions, 26 deletions

diff --git a/arch/arm/mach-lpc32xx/timer.c b/arch/arm/mach-lpc32xx/timer.c
index 4e5837299c04..ff3499d1fb1a 100644
--- a/arch/arm/mach-lpc32xx/timer.c
+++ b/arch/arm/mach-lpc32xx/timer.c
@@ -43,36 +43,24 @@ static int lpc32xx_clkevt_next_event(unsigned long delta,
         return 0;
 }
 
-static void lpc32xx_clkevt_mode(enum clock_event_mode mode,
-    struct clock_event_device *dev)
+static int lpc32xx_shutdown(struct clock_event_device *evt)
 {
-        switch (mode) {
-        case CLOCK_EVT_MODE_PERIODIC:
-                WARN_ON(1);
-                break;
-
-        case CLOCK_EVT_MODE_ONESHOT:
-        case CLOCK_EVT_MODE_SHUTDOWN:
-                /*
-                 * Disable the timer. When using oneshot, we must also
-                 * disable the timer to wait for the first call to
-                 * set_next_event().
-                 */
-                __raw_writel(0, LPC32XX_TIMER_TCR(LPC32XX_TIMER0_BASE));
-                break;
-
-        case CLOCK_EVT_MODE_UNUSED:
-        case CLOCK_EVT_MODE_RESUME:
-                break;
-        }
+        /*
+         * Disable the timer. When using oneshot, we must also
+         * disable the timer to wait for the first call to
+         * set_next_event().
+         */
+        __raw_writel(0, LPC32XX_TIMER_TCR(LPC32XX_TIMER0_BASE));
+        return 0;
 }
 
 static struct clock_event_device lpc32xx_clkevt = {
-        .name           = "lpc32xx_clkevt",
-        .features       = CLOCK_EVT_FEAT_ONESHOT,
-        .rating         = 300,
-        .set_next_event = lpc32xx_clkevt_next_event,
-        .set_mode       = lpc32xx_clkevt_mode,
+        .name                   = "lpc32xx_clkevt",
+        .features               = CLOCK_EVT_FEAT_ONESHOT,
+        .rating                 = 300,
+        .set_next_event         = lpc32xx_clkevt_next_event,
+        .set_state_shutdown     = lpc32xx_shutdown,
+        .set_state_oneshot      = lpc32xx_shutdown,
 };
 
 static irqreturn_t lpc32xx_timer_interrupt(int irq, void *dev_id)