linux-kernel - [PATCH] gpio: pl061: add support for wakeup configuration

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Message-Id: <1448644755-29183-1-git-send-email-sudeep.holla@arm.com>
Date:	Fri, 27 Nov 2015 17:19:15 +0000
From:	Sudeep Holla <sudeep.holla@....com>
To:	Linus Walleij <linus.walleij@...aro.org>,
	linux-gpio@...r.kernel.org
Cc:	Sudeep Holla <sudeep.holla@....com>, linux-kernel@...r.kernel.org,
	Alexandre Courbot <gnurou@...il.com>
Subject: [PATCH] gpio: pl061: add support for wakeup configuration

The PL061 supports interrupts and those can be wakeup interrupts. We
need to provide support for configuring those interrupts as wakeup
sources.

This patch adds irq_set_wake callback for PL061 so that GPIO interrupts
can be configured as wakeup.

Cc: Linus Walleij <linus.walleij@...aro.org>
Cc: Alexandre Courbot <gnurou@...il.com>
Signed-off-by: Sudeep Holla <sudeep.holla@....com>
---
 drivers/gpio/gpio-pl061.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/gpio/gpio-pl061.c b/drivers/gpio/gpio-pl061.c
index 4d4b37676702..8b1cbd5767f9 100644
--- a/drivers/gpio/gpio-pl061.c
+++ b/drivers/gpio/gpio-pl061.c
@@ -14,6 +14,7 @@
 #include <linux/module.h>
 #include <linux/io.h>
 #include <linux/ioport.h>
+#include <linux/interrupt.h>
 #include <linux/irq.h>
 #include <linux/irqchip/chained_irq.h>
 #include <linux/bitops.h>
@@ -269,12 +270,20 @@ static void pl061_irq_ack(struct irq_data *d)
 	spin_unlock(&chip->lock);
 }
 
+static int pl061_irq_set_wake(struct irq_data *d, unsigned int state)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+
+	return irq_set_irq_wake(gc->irq_parent, state);
+}
+
 static struct irq_chip pl061_irqchip = {
 	.name		= "pl061",
 	.irq_ack	= pl061_irq_ack,
 	.irq_mask	= pl061_irq_mask,
 	.irq_unmask	= pl061_irq_unmask,
 	.irq_set_type	= pl061_irq_type,
+	.irq_set_wake	= pl061_irq_set_wake,
 };
 
 static int pl061_probe(struct amba_device *adev, const struct amba_id *id)
-- 
1.9.1

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