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path: root/target/linux/ramips/patches-3.8/0052-MIPS-use-set_mode-to-enable-disable-the-cevt-r4k-irq.patch
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From b9afea3f5cf6c2da3b88f2902c4377e9c5b22a6d Mon Sep 17 00:00:00 2001
From: John Crispin <blogic@openwrt.org>
Date: Fri, 3 May 2013 00:04:58 +0200
Subject: [PATCH 52/79] MIPS: use set_mode() to enable/disable the cevt-r4k
 irq

Signed-off-by: John Crispin <blogic@openwrt.org>
---
 arch/mips/kernel/cevt-r4k.c |   39 ++++++++++++++++++++++++++-------------
 1 file changed, 26 insertions(+), 13 deletions(-)

diff --git a/arch/mips/kernel/cevt-r4k.c b/arch/mips/kernel/cevt-r4k.c
index 7532392..afc08e4 100644
--- a/arch/mips/kernel/cevt-r4k.c
+++ b/arch/mips/kernel/cevt-r4k.c
@@ -39,12 +39,6 @@ static int mips_next_event(unsigned long delta,
 
 #endif /* CONFIG_MIPS_MT_SMTC */
 
-void mips_set_clock_mode(enum clock_event_mode mode,
-				struct clock_event_device *evt)
-{
-	/* Nothing to do ...  */
-}
-
 DEFINE_PER_CPU(struct clock_event_device, mips_clockevent_device);
 int cp0_timer_irq_installed;
 
@@ -89,6 +83,32 @@ struct irqaction c0_compare_irqaction = {
 	.name = "timer",
 };
 
+void mips_set_clock_mode(enum clock_event_mode mode,
+				struct clock_event_device *evt)
+{
+	switch (mode) {
+	case CLOCK_EVT_MODE_ONESHOT:
+		if (cp0_timer_irq_installed)
+			break;
+
+		cp0_timer_irq_installed = 1;
+
+		setup_irq(evt->irq, &c0_compare_irqaction);
+		break;
+
+	case CLOCK_EVT_MODE_SHUTDOWN:
+		if (!cp0_timer_irq_installed)
+			break;
+
+		cp0_timer_irq_installed = 0;
+		free_irq(evt->irq, &c0_compare_irqaction);
+		break;
+
+	default:
+		pr_err("Unhandeled mips clock_mode\n");
+		break;
+	}
+}
 
 void mips_event_handler(struct clock_event_device *dev)
 {
@@ -208,13 +228,6 @@ int __cpuinit r4k_clockevent_init(void)
 
 	clockevents_register_device(cd);
 
-	if (cp0_timer_irq_installed)
-		return 0;
-
-	cp0_timer_irq_installed = 1;
-
-	setup_irq(irq, &c0_compare_irqaction);
-
 	return 0;
 }
 
-- 
1.7.10.4