openwrtv4/target/linux/brcm63xx/patches-3.18/030-MIPS-Always-use-IRQ-domains-for-CPU-IRQs.patch

From 0f84c305351c993e4307e1e8c128d44760314e31 Mon Sep 17 00:00:00 2001
From: Andrew Bresticker <abrestic@chromium.org>
Date: Thu, 18 Sep 2014 14:47:07 -0700
Subject: [PATCH 1/3] MIPS: Always use IRQ domains for CPU IRQs

Use an IRQ domain for the 8 CPU IRQs in both the DT and non-DT cases.

Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
Reviewed-by: Qais Yousef <qais.yousef@imgtec.com>
Tested-by: Qais Yousef <qais.yousef@imgtec.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Andrew Bresticker <abrestic@chromium.org>
Cc: Jeffrey Deans <jeffrey.deans@imgtec.com>
Cc: Markos Chandras <markos.chandras@imgtec.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: Qais Yousef <qais.yousef@imgtec.com>
Cc: Jonas Gorski <jogo@openwrt.org>
Cc: John Crispin <blogic@openwrt.org>
Cc: David Daney <ddaney.cavm@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/7799/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
---
 arch/mips/Kconfig          |    1 +
 arch/mips/kernel/irq_cpu.c |   36 +++++++++++-------------------------
 2 files changed, 12 insertions(+), 25 deletions(-)

--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -1056,6 +1056,7 @@ config MIPS_HUGE_TLB_SUPPORT
 
 config IRQ_CPU
 	bool
+	select IRQ_DOMAIN
 
 config IRQ_CPU_RM7K
 	bool
--- a/arch/mips/kernel/irq_cpu.c
+++ b/arch/mips/kernel/irq_cpu.c
@@ -98,28 +98,6 @@ static struct irq_chip mips_mt_cpu_irq_c
 	.irq_enable	= unmask_mips_irq,
 };
 
-void __init mips_cpu_irq_init(void)
-{
-	int irq_base = MIPS_CPU_IRQ_BASE;
-	int i;
-
-	/* Mask interrupts. */
-	clear_c0_status(ST0_IM);
-	clear_c0_cause(CAUSEF_IP);
-
-	/* Software interrupts are used for MT/CMT IPI */
-	for (i = irq_base; i < irq_base + 2; i++)
-		irq_set_chip_and_handler(i, cpu_has_mipsmt ?
-					 &mips_mt_cpu_irq_controller :
-					 &mips_cpu_irq_controller,
-					 handle_percpu_irq);
-
-	for (i = irq_base + 2; i < irq_base + 8; i++)
-		irq_set_chip_and_handler(i, &mips_cpu_irq_controller,
-					 handle_percpu_irq);
-}
-
-#ifdef CONFIG_IRQ_DOMAIN
 static int mips_cpu_intc_map(struct irq_domain *d, unsigned int irq,
 			     irq_hw_number_t hw)
 {
@@ -142,8 +120,7 @@ static const struct irq_domain_ops mips_
 	.xlate = irq_domain_xlate_onecell,
 };
 
-int __init mips_cpu_intc_init(struct device_node *of_node,
-			      struct device_node *parent)
+static void __init __mips_cpu_irq_init(struct device_node *of_node)
 {
 	struct irq_domain *domain;
 
@@ -155,7 +132,16 @@ int __init mips_cpu_intc_init(struct dev
 				       &mips_cpu_intc_irq_domain_ops, NULL);
 	if (!domain)
 		panic("Failed to add irqdomain for MIPS CPU");
+}
 
+void __init mips_cpu_irq_init(void)
+{
+	__mips_cpu_irq_init(NULL);
+}
+
+int __init mips_cpu_intc_init(struct device_node *of_node,
+			      struct device_node *parent)
+{
+	__mips_cpu_irq_init(of_node);
 	return 0;
 }
-#endif /* CONFIG_IRQ_DOMAIN */