linux-kernel - [PATCH v3 3/4] ARM: mvebu: Allow using the GIC for wakeup in standby mode

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Message-Id: <1435924553-22428-4-git-send-email-gregory.clement@free-electrons.com>
Date:	Fri,  3 Jul 2015 13:55:52 +0200
From:	Gregory CLEMENT <gregory.clement@...e-electrons.com>
To:	Jason Cooper <jason@...edaemon.net>, Andrew Lunn <andrew@...n.ch>,
	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
	Gregory CLEMENT <gregory.clement@...e-electrons.com>
Cc:	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	Ezequiel Garcia <ezequiel.garcia@...e-electrons.com>,
	linux-arm-kernel@...ts.infradead.org,
	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	Boris BREZILLON <boris.brezillon@...e-electrons.com>,
	Lior Amsalem <alior@...vell.com>,
	Tawfik Bayouk <tawfik@...vell.com>,
	Nadav Haklai <nadavh@...vell.com>, linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v3 3/4] ARM: mvebu: Allow using the GIC for wakeup in standby mode

On the Armada 375/38x/39x SoCs, in standby mode the SoCs stay powered
and it is possible to wake-up from any interrupt sources. This patch
adds flag to the GIC irqchip driver to let linux know this.

Signed-off-by: Gregory CLEMENT <gregory.clement@...e-electrons.com>
---
 arch/arm/mach-mvebu/board-v7.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/arm/mach-mvebu/board-v7.c b/arch/arm/mach-mvebu/board-v7.c
index e5911defccac..b789f7037445 100644
--- a/arch/arm/mach-mvebu/board-v7.c
+++ b/arch/arm/mach-mvebu/board-v7.c
@@ -18,6 +18,7 @@
 #include <linux/of_address.h>
 #include <linux/of_fdt.h>
 #include <linux/of_platform.h>
+#include <linux/irq.h>
 #include <linux/io.h>
 #include <linux/clocksource.h>
 #include <linux/dma-mapping.h>
@@ -26,6 +27,7 @@
 #include <linux/signal.h>
 #include <linux/slab.h>
 #include <linux/irqchip.h>
+#include <linux/irqchip/arm-gic.h>
 #include <asm/hardware/cache-l2x0.h>
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
@@ -129,6 +131,13 @@ static int armada_375_external_abort_wa(unsigned long addr, unsigned int fsr,
 
 static void __init mvebu_init_irq(void)
 {
+	struct device_node *np;
+
+	np = of_find_compatible_node(NULL, NULL, "arm,cortex-a9-gic");
+	if (np)
+		gic_set_irqchip_flags(IRQCHIP_SKIP_SET_WAKE |
+				      IRQCHIP_MASK_ON_SUSPEND);
+	of_node_put(np);
 	irqchip_init();
 	mvebu_scu_enable();
 	coherency_init();
-- 
2.1.0

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