From 8d91c1e411f55d7ea91b1183a2e9f8088fb4d5be Mon Sep 17 00:00:00 2001
From: André Fabian Silva Delgado <emulatorman@parabola.nu>
Date: Tue, 15 Dec 2015 14:52:16 -0300
Subject: Linux-libre 4.3.2-gnu

---
 arch/arm/mach-spear/time.c | 91 ++++++++++++++++++++++++++--------------------
 1 file changed, 51 insertions(+), 40 deletions(-)

(limited to 'arch/arm/mach-spear')

diff --git a/arch/arm/mach-spear/time.c b/arch/arm/mach-spear/time.c
index 26fda4ed4..9ccffc1d0 100644
--- a/arch/arm/mach-spear/time.c
+++ b/arch/arm/mach-spear/time.c
@@ -66,8 +66,6 @@
 static __iomem void *gpt_base;
 static struct clk *gpt_clk;
 
-static void clockevent_set_mode(enum clock_event_mode mode,
-				struct clock_event_device *clk_event_dev);
 static int clockevent_next_event(unsigned long evt,
 				 struct clock_event_device *clk_event_dev);
 
@@ -95,54 +93,67 @@ static void __init spear_clocksource_init(void)
 		200, 16, clocksource_mmio_readw_up);
 }
 
-static struct clock_event_device clkevt = {
-	.name = "tmr0",
-	.features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
-	.set_mode = clockevent_set_mode,
-	.set_next_event = clockevent_next_event,
-	.shift = 0,	/* to be computed */
-};
+static inline void timer_shutdown(struct clock_event_device *evt)
+{
+	u16 val = readw(gpt_base + CR(CLKEVT));
+
+	/* stop the timer */
+	val &= ~CTRL_ENABLE;
+	writew(val, gpt_base + CR(CLKEVT));
+}
+
+static int spear_shutdown(struct clock_event_device *evt)
+{
+	timer_shutdown(evt);
+
+	return 0;
+}
+
+static int spear_set_oneshot(struct clock_event_device *evt)
+{
+	u16 val;
 
-static void clockevent_set_mode(enum clock_event_mode mode,
-				struct clock_event_device *clk_event_dev)
+	/* stop the timer */
+	timer_shutdown(evt);
+
+	val = readw(gpt_base + CR(CLKEVT));
+	val |= CTRL_ONE_SHOT;
+	writew(val, gpt_base + CR(CLKEVT));
+
+	return 0;
+}
+
+static int spear_set_periodic(struct clock_event_device *evt)
 {
 	u32 period;
 	u16 val;
 
 	/* stop the timer */
+	timer_shutdown(evt);
+
+	period = clk_get_rate(gpt_clk) / HZ;
+	period >>= CTRL_PRESCALER16;
+	writew(period, gpt_base + LOAD(CLKEVT));
+
 	val = readw(gpt_base + CR(CLKEVT));
-	val &= ~CTRL_ENABLE;
+	val &= ~CTRL_ONE_SHOT;
+	val |= CTRL_ENABLE | CTRL_INT_ENABLE;
 	writew(val, gpt_base + CR(CLKEVT));
 
-	switch (mode) {
-	case CLOCK_EVT_MODE_PERIODIC:
-		period = clk_get_rate(gpt_clk) / HZ;
-		period >>= CTRL_PRESCALER16;
-		writew(period, gpt_base + LOAD(CLKEVT));
-
-		val = readw(gpt_base + CR(CLKEVT));
-		val &= ~CTRL_ONE_SHOT;
-		val |= CTRL_ENABLE | CTRL_INT_ENABLE;
-		writew(val, gpt_base + CR(CLKEVT));
-
-		break;
-	case CLOCK_EVT_MODE_ONESHOT:
-		val = readw(gpt_base + CR(CLKEVT));
-		val |= CTRL_ONE_SHOT;
-		writew(val, gpt_base + CR(CLKEVT));
-
-		break;
-	case CLOCK_EVT_MODE_UNUSED:
-	case CLOCK_EVT_MODE_SHUTDOWN:
-	case CLOCK_EVT_MODE_RESUME:
-
-		break;
-	default:
-		pr_err("Invalid mode requested\n");
-		break;
-	}
+	return 0;
 }
 
+static struct clock_event_device clkevt = {
+	.name = "tmr0",
+	.features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
+	.set_state_shutdown = spear_shutdown,
+	.set_state_periodic = spear_set_periodic,
+	.set_state_oneshot = spear_set_oneshot,
+	.tick_resume = spear_shutdown,
+	.set_next_event = clockevent_next_event,
+	.shift = 0,	/* to be computed */
+};
+
 static int clockevent_next_event(unsigned long cycles,
 				 struct clock_event_device *clk_event_dev)
 {
@@ -193,7 +204,7 @@ static void __init spear_clockevent_init(int irq)
 	setup_irq(irq, &spear_timer_irq);
 }
 
-const static struct of_device_id timer_of_match[] __initconst = {
+static const struct of_device_id const timer_of_match[] __initconst = {
 	{ .compatible = "st,spear-timer", },
 	{ },
 };
-- 
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