linux-kernel - [PATCH 08/12] MIPS: GIC: Implement generic irq_ack/irq

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Message-Id: <1409350479-19108-9-git-send-email-abrestic@chromium.org>
Date:	Fri, 29 Aug 2014 15:14:35 -0700
From:	Andrew Bresticker <abrestic@...omium.org>
To:	Ralf Baechle <ralf@...ux-mips.org>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>
Cc:	Andrew Bresticker <abrestic@...omium.org>,
	Jeffrey Deans <jeffrey.deans@...tec.com>,
	Markos Chandras <markos.chandras@...tec.com>,
	Paul Burton <paul.burton@...tec.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Jason Cooper <jason@...edaemon.net>, linux-mips@...ux-mips.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 08/12] MIPS: GIC: Implement generic irq_ack/irq_eoi callbacks

Implement a default gic_irq_ack() and gic_finish_irq().  These are
suitable for handling IPIs on Malta and the upcoming Danube board.

Signed-off-by: Andrew Bresticker <abrestic@...omium.org>
---
 arch/mips/kernel/irq-gic.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/arch/mips/kernel/irq-gic.c b/arch/mips/kernel/irq-gic.c
index 01fcc28..1764b01 100644
--- a/arch/mips/kernel/irq-gic.c
+++ b/arch/mips/kernel/irq-gic.c
@@ -242,6 +242,20 @@ static void gic_unmask_irq(struct irq_data *d)
 	GIC_SET_INTR_MASK(d->irq - gic_irq_base);
 }
 
+void __weak gic_irq_ack(struct irq_data *d)
+{
+	GIC_CLR_INTR_MASK(d->irq - gic_irq_base);
+
+	/* Clear edge detector */
+	if (gic_irq_flags[d->irq - gic_irq_base] & GIC_TRIG_EDGE)
+		GICWRITE(GIC_REG(SHARED, GIC_SH_WEDGE), d->irq - gic_irq_base);
+}
+
+void __weak gic_finish_irq(struct irq_data *d)
+{
+	GIC_SET_INTR_MASK(d->irq - gic_irq_base);
+}
+
 static int gic_set_type(struct irq_data *d, unsigned int type)
 {
 	unsigned int irq = d->irq - gic_irq_base;
-- 
2.1.0.rc2.206.gedb03e5

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