openwrt/target/linux/ramips/patches-3.10/0100-MIPS-use-set_mode-to-enable-disable-the-cevt-r4k-irq.patch

From 1be15a87eea5f26fb24b6aac332530cd3e2d984e Mon Sep 17 00:00:00 2001
From: John Crispin <[email protected]>
Date: Sun, 14 Jul 2013 23:08:11 +0200
Subject: [PATCH 100/133] MIPS: use set_mode() to enable/disable the cevt-r4k
 irq

Signed-off-by: John Crispin <[email protected]>
---
 arch/mips/kernel/cevt-r4k.c |   39 ++++++++++++++++++++++++++-------------
 1 file changed, 26 insertions(+), 13 deletions(-)

--- a/arch/mips/kernel/cevt-r4k.c
+++ b/arch/mips/kernel/cevt-r4k.c
@@ -38,12 +38,6 @@ static int mips_next_event(unsigned long
 
 #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;
 
@@ -90,9 +84,38 @@ struct irqaction c0_compare_irqaction =
 	.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)
 {
+
 }
 
 /*
@@ -215,12 +238,14 @@ int __cpuinit r4k_clockevent_init(void)
 #endif
 	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;
 }