openwrtv4/target/linux/ramips/patches-3.18/0017-MIPS-use-set_mode-to-enable-disable-the-cevt-r4k-irq.patch

From f8da5caf65926d44581d4e7914b28ceab3d28a7c Mon Sep 17 00:00:00 2001
From: John Crispin <blogic@openwrt.org>
Date: Sun, 14 Jul 2013 23:08:11 +0200
Subject: [PATCH 17/57] 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 |   37 +++++++++++++++++++++++++++++++------
 1 file changed, 31 insertions(+), 6 deletions(-)

--- a/arch/mips/kernel/cevt-r4k.c
+++ b/arch/mips/kernel/cevt-r4k.c
@@ -29,12 +29,6 @@
 	return res;
 }
 
-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;
 
@@ -75,9 +69,38 @@
 	.name = "timer",
 };
 
+void mips_set_clock_mode(enum clock_event_mode mode,
+				struct clock_event_device *evt)
+{
+#ifdef CONFIG_CEVT_SYSTICK_QUIRK
+	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;
+	}
+#endif
+}
 
 void mips_event_handler(struct clock_event_device *dev)
 {
+
 }
 
 /*
@@ -198,12 +221,14 @@
 
 	clockevents_register_device(cd);
 
+#ifndef CONFIG_CEVT_SYSTICK_QUIRK
 	if (cp0_timer_irq_installed)
 		return 0;
 
 	cp0_timer_irq_installed = 1;
 
 	setup_irq(irq, &c0_compare_irqaction);
+#endif
 
 	return 0;
 }
--- a/arch/mips/ralink/Kconfig
+++ b/arch/mips/ralink/Kconfig
@@ -1,11 +1,16 @@
 if RALINK
 
+config CEVT_SYSTICK_QUIRK
+	bool
+	default n
+
 config CLKEVT_RT3352
 	bool
 	depends on SOC_RT305X || SOC_MT7620
 	default y
 	select CLKSRC_OF
 	select CLKSRC_MMIO
+	select CEVT_SYSTICK_QUIRK
 
 config IRQ_INTC
 	bool